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CVE-2024-30156 (GCVE-0-2024-30156)
Vulnerability from cvelistv5 – Published: 2024-03-24 00:00 – Updated: 2024-11-21 19:12- n/a
- CWE-770 - Allocation of Resources Without Limits or Throttling
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RHSA-2024:2820
Vulnerability from csaf_redhat - Published: 2024-05-13 01:26 - Updated: 2026-06-28 12:43A flaw was found in the Varnish cache server, with HTTP/2 support enabled, that may allow a Denial of Service type of attack. A malicious actor can cause the server to run out of credits during the HTTP/2 connection control flow. As a consequence, the server will stop to properly process the active HTTP streams, retaining the already allocated resources, leading to resource starvation.
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-9.2.0.Z.EUS:varnish-0:6.6.2-3.el9_2.2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.2.0.Z.EUS:varnish-0:6.6.2-3.el9_2.2.i686 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.2.0.Z.EUS:varnish-0:6.6.2-3.el9_2.2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.2.0.Z.EUS:varnish-0:6.6.2-3.el9_2.2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.2.0.Z.EUS:varnish-0:6.6.2-3.el9_2.2.src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.2.0.Z.EUS:varnish-0:6.6.2-3.el9_2.2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.2.0.Z.EUS:varnish-docs-0:6.6.2-3.el9_2.2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.2.0.Z.EUS:varnish-docs-0:6.6.2-3.el9_2.2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.2.0.Z.EUS:varnish-docs-0:6.6.2-3.el9_2.2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.2.0.Z.EUS:varnish-docs-0:6.6.2-3.el9_2.2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.2.0.Z.EUS:varnish-devel-0:6.6.2-3.el9_2.2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.2.0.Z.EUS:varnish-devel-0:6.6.2-3.el9_2.2.i686 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.2.0.Z.EUS:varnish-devel-0:6.6.2-3.el9_2.2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.2.0.Z.EUS:varnish-devel-0:6.6.2-3.el9_2.2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.2.0.Z.EUS:varnish-devel-0:6.6.2-3.el9_2.2.x86_64 | — |
Vendor Fix
fix
Workaround
|
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "varnish: HTTP/2 Broken Window Attack may result in denial of service"
}
]
}
RHSA-2024:2938
Vulnerability from csaf_redhat - Published: 2024-05-21 10:05 - Updated: 2026-06-28 12:43A flaw was found in the Varnish cache server, with HTTP/2 support enabled, that may allow a Denial of Service type of attack. A malicious actor can cause the server to run out of credits during the HTTP/2 connection control flow. As a consequence, the server will stop to properly process the active HTTP streams, retaining the already allocated resources, leading to resource starvation.
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-8.4.0.Z.AUS:varnish-0:6.0.6-2.module+el8.4.0+21799+2c737c67.5.src::varnish:6 | — |
Vendor Fix
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|
| Unresolved product id: AppStream-8.4.0.Z.AUS:varnish-0:6.0.6-2.module+el8.4.0+21799+2c737c67.5.x86_64::varnish:6 | — |
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|
| Unresolved product id: AppStream-8.4.0.Z.AUS:varnish-devel-0:6.0.6-2.module+el8.4.0+21799+2c737c67.5.x86_64::varnish:6 | — |
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| Unresolved product id: AppStream-8.4.0.Z.AUS:varnish-docs-0:6.0.6-2.module+el8.4.0+21799+2c737c67.5.x86_64::varnish:6 | — |
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| Unresolved product id: AppStream-8.4.0.Z.AUS:varnish-modules-0:0.15.0-5.module+el8.3.0+6843+b3b42fcc.src::varnish:6 | — |
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fix
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|
|
| Unresolved product id: AppStream-8.4.0.Z.AUS:varnish-modules-0:0.15.0-5.module+el8.3.0+6843+b3b42fcc.x86_64::varnish:6 | — |
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|
| Unresolved product id: AppStream-8.4.0.Z.AUS:varnish-modules-debuginfo-0:0.15.0-5.module+el8.3.0+6843+b3b42fcc.x86_64::varnish:6 | — |
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|
|
| Unresolved product id: AppStream-8.4.0.Z.AUS:varnish-modules-debugsource-0:0.15.0-5.module+el8.3.0+6843+b3b42fcc.x86_64::varnish:6 | — |
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|
|
| Unresolved product id: AppStream-8.4.0.Z.E4S:varnish-0:6.0.6-2.module+el8.4.0+21799+2c737c67.5.ppc64le::varnish:6 | — |
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|
|
| Unresolved product id: AppStream-8.4.0.Z.E4S:varnish-0:6.0.6-2.module+el8.4.0+21799+2c737c67.5.src::varnish:6 | — |
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fix
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|
|
| Unresolved product id: AppStream-8.4.0.Z.E4S:varnish-0:6.0.6-2.module+el8.4.0+21799+2c737c67.5.x86_64::varnish:6 | — |
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fix
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|
|
| Unresolved product id: AppStream-8.4.0.Z.E4S:varnish-devel-0:6.0.6-2.module+el8.4.0+21799+2c737c67.5.ppc64le::varnish:6 | — |
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|
|
| Unresolved product id: AppStream-8.4.0.Z.E4S:varnish-devel-0:6.0.6-2.module+el8.4.0+21799+2c737c67.5.x86_64::varnish:6 | — |
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|
| Unresolved product id: AppStream-8.4.0.Z.E4S:varnish-docs-0:6.0.6-2.module+el8.4.0+21799+2c737c67.5.ppc64le::varnish:6 | — |
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|
|
| Unresolved product id: AppStream-8.4.0.Z.E4S:varnish-docs-0:6.0.6-2.module+el8.4.0+21799+2c737c67.5.x86_64::varnish:6 | — |
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|
| Unresolved product id: AppStream-8.4.0.Z.E4S:varnish-modules-0:0.15.0-5.module+el8.3.0+6843+b3b42fcc.ppc64le::varnish:6 | — |
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|
|
| Unresolved product id: AppStream-8.4.0.Z.E4S:varnish-modules-0:0.15.0-5.module+el8.3.0+6843+b3b42fcc.src::varnish:6 | — |
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| Unresolved product id: AppStream-8.4.0.Z.E4S:varnish-modules-0:0.15.0-5.module+el8.3.0+6843+b3b42fcc.x86_64::varnish:6 | — |
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|
| Unresolved product id: AppStream-8.4.0.Z.E4S:varnish-modules-debuginfo-0:0.15.0-5.module+el8.3.0+6843+b3b42fcc.ppc64le::varnish:6 | — |
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|
| Unresolved product id: AppStream-8.4.0.Z.E4S:varnish-modules-debuginfo-0:0.15.0-5.module+el8.3.0+6843+b3b42fcc.x86_64::varnish:6 | — |
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|
|
| Unresolved product id: AppStream-8.4.0.Z.E4S:varnish-modules-debugsource-0:0.15.0-5.module+el8.3.0+6843+b3b42fcc.ppc64le::varnish:6 | — |
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|
|
| Unresolved product id: AppStream-8.4.0.Z.E4S:varnish-modules-debugsource-0:0.15.0-5.module+el8.3.0+6843+b3b42fcc.x86_64::varnish:6 | — |
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|
|
| Unresolved product id: AppStream-8.4.0.Z.TUS:varnish-0:6.0.6-2.module+el8.4.0+21799+2c737c67.5.src::varnish:6 | — |
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|
|
| Unresolved product id: AppStream-8.4.0.Z.TUS:varnish-0:6.0.6-2.module+el8.4.0+21799+2c737c67.5.x86_64::varnish:6 | — |
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|
|
| Unresolved product id: AppStream-8.4.0.Z.TUS:varnish-devel-0:6.0.6-2.module+el8.4.0+21799+2c737c67.5.x86_64::varnish:6 | — |
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|
|
| Unresolved product id: AppStream-8.4.0.Z.TUS:varnish-docs-0:6.0.6-2.module+el8.4.0+21799+2c737c67.5.x86_64::varnish:6 | — |
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|
|
| Unresolved product id: AppStream-8.4.0.Z.TUS:varnish-modules-0:0.15.0-5.module+el8.3.0+6843+b3b42fcc.src::varnish:6 | — |
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|
|
| Unresolved product id: AppStream-8.4.0.Z.TUS:varnish-modules-0:0.15.0-5.module+el8.3.0+6843+b3b42fcc.x86_64::varnish:6 | — |
Vendor Fix
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|
|
| Unresolved product id: AppStream-8.4.0.Z.TUS:varnish-modules-debuginfo-0:0.15.0-5.module+el8.3.0+6843+b3b42fcc.x86_64::varnish:6 | — |
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|
|
| Unresolved product id: AppStream-8.4.0.Z.TUS:varnish-modules-debugsource-0:0.15.0-5.module+el8.3.0+6843+b3b42fcc.x86_64::varnish:6 | — |
Vendor Fix
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Workaround
|
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"text": "2271486"
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{
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"text": "A flaw was found in the Varnish cache server, with HTTP/2 support enabled, that may allow a Denial of Service type of attack. A malicious actor can cause the server to run out of credits during the HTTP/2 connection control flow. As a consequence, the server will stop to properly process the active HTTP streams, retaining the already allocated resources, leading to resource starvation.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "varnish: HTTP/2 Broken Window Attack may result in denial of service",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "CVE-2024-30156 represents a important severity issue due to its potential to cause widespread denial of service (DoS) across Varnish Cacher servers with HTTP/2 protocol enabled. By exploiting this vulnerability, attackers can exhaust the server\u0027s HTTP/2 connection control flow window credits, thereby halting the processing of streams and indefinitely retaining associated resources. This can lead to a complete service outage, impacting the availability and performance of web services relying on Varnish Cache. Given the prevalence of HTTP/2 adoption for its performance benefits, the vulnerability poses a significant risk to web infrastructure, necessitating immediate mitigation measures to prevent exploitation and mitigate the impact on affected systems.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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},
{
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"url": "https://www.cve.org/CVERecord?id=CVE-2024-30156"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2024-30156",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-30156"
},
{
"category": "external",
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"category": "vendor_fix",
"date": "2024-05-21T10:05:18+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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{
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"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "varnish: HTTP/2 Broken Window Attack may result in denial of service"
}
]
}
RHSA-2024:3305
Vulnerability from csaf_redhat - Published: 2024-05-23 07:06 - Updated: 2026-06-28 12:17A flaw was found in the Varnish cache server, with HTTP/2 support enabled, that may allow a Denial of Service type of attack. A malicious actor can cause the server to run out of credits during the HTTP/2 connection control flow. As a consequence, the server will stop to properly process the active HTTP streams, retaining the already allocated resources, leading to resource starvation.
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-8.8.0.Z.EUS:varnish-0:6.0.8-3.module+el8.8.0+21796+79393093.2.aarch64::varnish:6 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.8.0.Z.EUS:varnish-0:6.0.8-3.module+el8.8.0+21796+79393093.2.ppc64le::varnish:6 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.8.0.Z.EUS:varnish-0:6.0.8-3.module+el8.8.0+21796+79393093.2.s390x::varnish:6 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.8.0.Z.EUS:varnish-0:6.0.8-3.module+el8.8.0+21796+79393093.2.src::varnish:6 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.8.0.Z.EUS:varnish-0:6.0.8-3.module+el8.8.0+21796+79393093.2.x86_64::varnish:6 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.8.0.Z.EUS:varnish-devel-0:6.0.8-3.module+el8.8.0+21796+79393093.2.aarch64::varnish:6 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.8.0.Z.EUS:varnish-devel-0:6.0.8-3.module+el8.8.0+21796+79393093.2.ppc64le::varnish:6 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.8.0.Z.EUS:varnish-devel-0:6.0.8-3.module+el8.8.0+21796+79393093.2.s390x::varnish:6 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.8.0.Z.EUS:varnish-devel-0:6.0.8-3.module+el8.8.0+21796+79393093.2.x86_64::varnish:6 | — |
Vendor Fix
fix
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|
|
| Unresolved product id: AppStream-8.8.0.Z.EUS:varnish-docs-0:6.0.8-3.module+el8.8.0+21796+79393093.2.aarch64::varnish:6 | — |
Vendor Fix
fix
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|
|
| Unresolved product id: AppStream-8.8.0.Z.EUS:varnish-docs-0:6.0.8-3.module+el8.8.0+21796+79393093.2.ppc64le::varnish:6 | — |
Vendor Fix
fix
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|
|
| Unresolved product id: AppStream-8.8.0.Z.EUS:varnish-docs-0:6.0.8-3.module+el8.8.0+21796+79393093.2.s390x::varnish:6 | — |
Vendor Fix
fix
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|
|
| Unresolved product id: AppStream-8.8.0.Z.EUS:varnish-docs-0:6.0.8-3.module+el8.8.0+21796+79393093.2.x86_64::varnish:6 | — |
Vendor Fix
fix
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|
|
| Unresolved product id: AppStream-8.8.0.Z.EUS:varnish-modules-0:0.15.0-6.module+el8.5.0+11976+0b4af72d.aarch64::varnish:6 | — |
Vendor Fix
fix
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|
|
| Unresolved product id: AppStream-8.8.0.Z.EUS:varnish-modules-0:0.15.0-6.module+el8.5.0+11976+0b4af72d.ppc64le::varnish:6 | — |
Vendor Fix
fix
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|
|
| Unresolved product id: AppStream-8.8.0.Z.EUS:varnish-modules-0:0.15.0-6.module+el8.5.0+11976+0b4af72d.s390x::varnish:6 | — |
Vendor Fix
fix
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|
|
| Unresolved product id: AppStream-8.8.0.Z.EUS:varnish-modules-0:0.15.0-6.module+el8.5.0+11976+0b4af72d.src::varnish:6 | — |
Vendor Fix
fix
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|
|
| Unresolved product id: AppStream-8.8.0.Z.EUS:varnish-modules-0:0.15.0-6.module+el8.5.0+11976+0b4af72d.x86_64::varnish:6 | — |
Vendor Fix
fix
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|
|
| Unresolved product id: AppStream-8.8.0.Z.EUS:varnish-modules-debuginfo-0:0.15.0-6.module+el8.5.0+11976+0b4af72d.aarch64::varnish:6 | — |
Vendor Fix
fix
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|
|
| Unresolved product id: AppStream-8.8.0.Z.EUS:varnish-modules-debuginfo-0:0.15.0-6.module+el8.5.0+11976+0b4af72d.ppc64le::varnish:6 | — |
Vendor Fix
fix
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|
|
| Unresolved product id: AppStream-8.8.0.Z.EUS:varnish-modules-debuginfo-0:0.15.0-6.module+el8.5.0+11976+0b4af72d.s390x::varnish:6 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.8.0.Z.EUS:varnish-modules-debuginfo-0:0.15.0-6.module+el8.5.0+11976+0b4af72d.x86_64::varnish:6 | — |
Vendor Fix
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|
|
| Unresolved product id: AppStream-8.8.0.Z.EUS:varnish-modules-debugsource-0:0.15.0-6.module+el8.5.0+11976+0b4af72d.aarch64::varnish:6 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.8.0.Z.EUS:varnish-modules-debugsource-0:0.15.0-6.module+el8.5.0+11976+0b4af72d.ppc64le::varnish:6 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.8.0.Z.EUS:varnish-modules-debugsource-0:0.15.0-6.module+el8.5.0+11976+0b4af72d.s390x::varnish:6 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.8.0.Z.EUS:varnish-modules-debugsource-0:0.15.0-6.module+el8.5.0+11976+0b4af72d.x86_64::varnish:6 | — |
Vendor Fix
fix
Workaround
|
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"text": "A flaw was found in the Varnish cache server, with HTTP/2 support enabled, that may allow a Denial of Service type of attack. A malicious actor can cause the server to run out of credits during the HTTP/2 connection control flow. As a consequence, the server will stop to properly process the active HTTP streams, retaining the already allocated resources, leading to resource starvation.",
"title": "Vulnerability description"
},
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"text": "varnish: HTTP/2 Broken Window Attack may result in denial of service",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "CVE-2024-30156 represents a important severity issue due to its potential to cause widespread denial of service (DoS) across Varnish Cacher servers with HTTP/2 protocol enabled. By exploiting this vulnerability, attackers can exhaust the server\u0027s HTTP/2 connection control flow window credits, thereby halting the processing of streams and indefinitely retaining associated resources. This can lead to a complete service outage, impacting the availability and performance of web services relying on Varnish Cache. Given the prevalence of HTTP/2 adoption for its performance benefits, the vulnerability poses a significant risk to web infrastructure, necessitating immediate mitigation measures to prevent exploitation and mitigate the impact on affected systems.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "varnish: HTTP/2 Broken Window Attack may result in denial of service"
}
]
}
RHSA-2024:3426
Vulnerability from csaf_redhat - Published: 2024-05-28 14:33 - Updated: 2026-06-28 12:43A flaw was found in the Varnish cache server, with HTTP/2 support enabled, that may allow a Denial of Service type of attack. A malicious actor can cause the server to run out of credits during the HTTP/2 connection control flow. As a consequence, the server will stop to properly process the active HTTP streams, retaining the already allocated resources, leading to resource starvation.
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-8.6.0.Z.EUS:varnish-0:6.0.8-2.module+el8.6.0+21852+17475f6a.3.aarch64::varnish:6 | — |
Vendor Fix
fix
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|
| Unresolved product id: AppStream-8.6.0.Z.EUS:varnish-0:6.0.8-2.module+el8.6.0+21852+17475f6a.3.ppc64le::varnish:6 | — |
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|
| Unresolved product id: AppStream-8.6.0.Z.EUS:varnish-0:6.0.8-2.module+el8.6.0+21852+17475f6a.3.s390x::varnish:6 | — |
Vendor Fix
fix
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|
| Unresolved product id: AppStream-8.6.0.Z.EUS:varnish-0:6.0.8-2.module+el8.6.0+21852+17475f6a.3.src::varnish:6 | — |
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fix
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| Unresolved product id: AppStream-8.6.0.Z.EUS:varnish-0:6.0.8-2.module+el8.6.0+21852+17475f6a.3.x86_64::varnish:6 | — |
Vendor Fix
fix
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|
|
| Unresolved product id: AppStream-8.6.0.Z.EUS:varnish-devel-0:6.0.8-2.module+el8.6.0+21852+17475f6a.3.aarch64::varnish:6 | — |
Vendor Fix
fix
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|
|
| Unresolved product id: AppStream-8.6.0.Z.EUS:varnish-devel-0:6.0.8-2.module+el8.6.0+21852+17475f6a.3.ppc64le::varnish:6 | — |
Vendor Fix
fix
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|
|
| Unresolved product id: AppStream-8.6.0.Z.EUS:varnish-devel-0:6.0.8-2.module+el8.6.0+21852+17475f6a.3.s390x::varnish:6 | — |
Vendor Fix
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|
|
| Unresolved product id: AppStream-8.6.0.Z.EUS:varnish-devel-0:6.0.8-2.module+el8.6.0+21852+17475f6a.3.x86_64::varnish:6 | — |
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| Unresolved product id: AppStream-8.6.0.Z.EUS:varnish-docs-0:6.0.8-2.module+el8.6.0+21852+17475f6a.3.aarch64::varnish:6 | — |
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|
|
| Unresolved product id: AppStream-8.6.0.Z.EUS:varnish-docs-0:6.0.8-2.module+el8.6.0+21852+17475f6a.3.ppc64le::varnish:6 | — |
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| Unresolved product id: AppStream-8.6.0.Z.EUS:varnish-docs-0:6.0.8-2.module+el8.6.0+21852+17475f6a.3.s390x::varnish:6 | — |
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| Unresolved product id: AppStream-8.6.0.Z.EUS:varnish-docs-0:6.0.8-2.module+el8.6.0+21852+17475f6a.3.x86_64::varnish:6 | — |
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| Unresolved product id: AppStream-8.6.0.Z.EUS:varnish-modules-0:0.15.0-6.module+el8.5.0+11976+0b4af72d.aarch64::varnish:6 | — |
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|
|
| Unresolved product id: AppStream-8.6.0.Z.EUS:varnish-modules-0:0.15.0-6.module+el8.5.0+11976+0b4af72d.ppc64le::varnish:6 | — |
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| Unresolved product id: AppStream-8.6.0.Z.EUS:varnish-modules-0:0.15.0-6.module+el8.5.0+11976+0b4af72d.s390x::varnish:6 | — |
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|
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| Unresolved product id: AppStream-8.6.0.Z.EUS:varnish-modules-0:0.15.0-6.module+el8.5.0+11976+0b4af72d.src::varnish:6 | — |
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| Unresolved product id: AppStream-8.6.0.Z.EUS:varnish-modules-0:0.15.0-6.module+el8.5.0+11976+0b4af72d.x86_64::varnish:6 | — |
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| Unresolved product id: AppStream-8.6.0.Z.EUS:varnish-modules-debuginfo-0:0.15.0-6.module+el8.5.0+11976+0b4af72d.aarch64::varnish:6 | — |
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| Unresolved product id: AppStream-8.6.0.Z.EUS:varnish-modules-debuginfo-0:0.15.0-6.module+el8.5.0+11976+0b4af72d.ppc64le::varnish:6 | — |
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|
|
| Unresolved product id: AppStream-8.6.0.Z.EUS:varnish-modules-debuginfo-0:0.15.0-6.module+el8.5.0+11976+0b4af72d.s390x::varnish:6 | — |
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|
|
| Unresolved product id: AppStream-8.6.0.Z.EUS:varnish-modules-debuginfo-0:0.15.0-6.module+el8.5.0+11976+0b4af72d.x86_64::varnish:6 | — |
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|
|
| Unresolved product id: AppStream-8.6.0.Z.EUS:varnish-modules-debugsource-0:0.15.0-6.module+el8.5.0+11976+0b4af72d.aarch64::varnish:6 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.6.0.Z.EUS:varnish-modules-debugsource-0:0.15.0-6.module+el8.5.0+11976+0b4af72d.ppc64le::varnish:6 | — |
Vendor Fix
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|
|
| Unresolved product id: AppStream-8.6.0.Z.EUS:varnish-modules-debugsource-0:0.15.0-6.module+el8.5.0+11976+0b4af72d.s390x::varnish:6 | — |
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|
|
| Unresolved product id: AppStream-8.6.0.Z.EUS:varnish-modules-debugsource-0:0.15.0-6.module+el8.5.0+11976+0b4af72d.x86_64::varnish:6 | — |
Vendor Fix
fix
Workaround
|
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"title": "Vulnerability description"
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"text": "CVE-2024-30156 represents a important severity issue due to its potential to cause widespread denial of service (DoS) across Varnish Cacher servers with HTTP/2 protocol enabled. By exploiting this vulnerability, attackers can exhaust the server\u0027s HTTP/2 connection control flow window credits, thereby halting the processing of streams and indefinitely retaining associated resources. This can lead to a complete service outage, impacting the availability and performance of web services relying on Varnish Cache. Given the prevalence of HTTP/2 adoption for its performance benefits, the vulnerability poses a significant risk to web infrastructure, necessitating immediate mitigation measures to prevent exploitation and mitigate the impact on affected systems.",
"title": "Statement"
},
{
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"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
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"title": "varnish: HTTP/2 Broken Window Attack may result in denial of service"
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}
RHSA-2024:4937
Vulnerability from csaf_redhat - Published: 2024-07-31 10:18 - Updated: 2026-06-28 12:20A flaw was found in the Varnish cache server, with HTTP/2 support enabled, that may allow a Denial of Service type of attack. A malicious actor can cause the server to run out of credits during the HTTP/2 connection control flow. As a consequence, the server will stop to properly process the active HTTP streams, retaining the already allocated resources, leading to resource starvation.
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-8.2.0.Z.AUS:varnish-0:6.0.6-1.module+el8.2.0+22154+6b906702.src::varnish:6 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.2.0.Z.AUS:varnish-0:6.0.6-1.module+el8.2.0+22154+6b906702.x86_64::varnish:6 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.2.0.Z.AUS:varnish-devel-0:6.0.6-1.module+el8.2.0+22154+6b906702.x86_64::varnish:6 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.2.0.Z.AUS:varnish-docs-0:6.0.6-1.module+el8.2.0+22154+6b906702.x86_64::varnish:6 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.2.0.Z.AUS:varnish-modules-0:0.15.0-4.module+el8+2481+4078e9d2.src::varnish:6 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.2.0.Z.AUS:varnish-modules-0:0.15.0-4.module+el8+2481+4078e9d2.x86_64::varnish:6 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.2.0.Z.AUS:varnish-modules-debuginfo-0:0.15.0-4.module+el8+2481+4078e9d2.x86_64::varnish:6 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.2.0.Z.AUS:varnish-modules-debugsource-0:0.15.0-4.module+el8+2481+4078e9d2.x86_64::varnish:6 | — |
Vendor Fix
fix
Workaround
|
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"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2271486"
}
],
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{
"category": "description",
"text": "A flaw was found in the Varnish cache server, with HTTP/2 support enabled, that may allow a Denial of Service type of attack. A malicious actor can cause the server to run out of credits during the HTTP/2 connection control flow. As a consequence, the server will stop to properly process the active HTTP streams, retaining the already allocated resources, leading to resource starvation.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "varnish: HTTP/2 Broken Window Attack may result in denial of service",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "CVE-2024-30156 represents a important severity issue due to its potential to cause widespread denial of service (DoS) across Varnish Cacher servers with HTTP/2 protocol enabled. By exploiting this vulnerability, attackers can exhaust the server\u0027s HTTP/2 connection control flow window credits, thereby halting the processing of streams and indefinitely retaining associated resources. This can lead to a complete service outage, impacting the availability and performance of web services relying on Varnish Cache. Given the prevalence of HTTP/2 adoption for its performance benefits, the vulnerability poses a significant risk to web infrastructure, necessitating immediate mitigation measures to prevent exploitation and mitigate the impact on affected systems.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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},
{
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},
{
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{
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"date": "2024-07-31T10:18:05+00:00",
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},
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"details": "A possible mitigation for this issue is to disable http2 support until the package can be updated.\nThis can be performed by running the following command:\n\n~~~\nvarnishadm param.set feature -http2\n~~~\n\nNote: you must remove `h2` from the list of protocols if your TLS terminator is advertising it with ALPN.\n\nIt\u0027s also possible to use the `MAIN.sc_bankrupt` counter to monitor possible on-going attacks to the varnish server.",
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"scope": "UNCHANGED",
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}
RHSA-2024_1689
Vulnerability from csaf_redhat - Published: 2024-04-08 08:47 - Updated: 2024-11-15 18:35A flaw was found in the Varnish cache server, with HTTP/2 support enabled, that may allow a Denial of Service type of attack. A malicious actor can cause the server to run out of credits during the HTTP/2 connection control flow. As a consequence, the server will stop to properly process the active HTTP streams, retaining the already allocated resources, leading to resource starvation.
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: 7Server-RHSCL-3.8:rh-varnish6-varnish-0:6.0.13-1.el7.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Server-RHSCL-3.8:rh-varnish6-varnish-0:6.0.13-1.el7.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Server-RHSCL-3.8:rh-varnish6-varnish-0:6.0.13-1.el7.src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Server-RHSCL-3.8:rh-varnish6-varnish-0:6.0.13-1.el7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Server-RHSCL-3.8:rh-varnish6-varnish-devel-0:6.0.13-1.el7.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Server-RHSCL-3.8:rh-varnish6-varnish-devel-0:6.0.13-1.el7.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Server-RHSCL-3.8:rh-varnish6-varnish-devel-0:6.0.13-1.el7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Server-RHSCL-3.8:rh-varnish6-varnish-docs-0:6.0.13-1.el7.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Server-RHSCL-3.8:rh-varnish6-varnish-docs-0:6.0.13-1.el7.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Server-RHSCL-3.8:rh-varnish6-varnish-docs-0:6.0.13-1.el7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Server-RHSCL-3.8:rh-varnish6-varnish-libs-0:6.0.13-1.el7.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Server-RHSCL-3.8:rh-varnish6-varnish-libs-0:6.0.13-1.el7.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Server-RHSCL-3.8:rh-varnish6-varnish-libs-0:6.0.13-1.el7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Server-RHSCL-3.8:rh-varnish6-varnish-modules-0:0.15.0-8.el7.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Server-RHSCL-3.8:rh-varnish6-varnish-modules-0:0.15.0-8.el7.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Server-RHSCL-3.8:rh-varnish6-varnish-modules-0:0.15.0-8.el7.src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Server-RHSCL-3.8:rh-varnish6-varnish-modules-0:0.15.0-8.el7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Server-RHSCL-3.8:rh-varnish6-varnish-modules-debuginfo-0:0.15.0-8.el7.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Server-RHSCL-3.8:rh-varnish6-varnish-modules-debuginfo-0:0.15.0-8.el7.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Server-RHSCL-3.8:rh-varnish6-varnish-modules-debuginfo-0:0.15.0-8.el7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Workstation-RHSCL-3.8:rh-varnish6-varnish-0:6.0.13-1.el7.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Workstation-RHSCL-3.8:rh-varnish6-varnish-0:6.0.13-1.el7.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Workstation-RHSCL-3.8:rh-varnish6-varnish-0:6.0.13-1.el7.src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Workstation-RHSCL-3.8:rh-varnish6-varnish-0:6.0.13-1.el7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Workstation-RHSCL-3.8:rh-varnish6-varnish-devel-0:6.0.13-1.el7.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Workstation-RHSCL-3.8:rh-varnish6-varnish-devel-0:6.0.13-1.el7.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Workstation-RHSCL-3.8:rh-varnish6-varnish-devel-0:6.0.13-1.el7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Workstation-RHSCL-3.8:rh-varnish6-varnish-docs-0:6.0.13-1.el7.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Workstation-RHSCL-3.8:rh-varnish6-varnish-docs-0:6.0.13-1.el7.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Workstation-RHSCL-3.8:rh-varnish6-varnish-docs-0:6.0.13-1.el7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Workstation-RHSCL-3.8:rh-varnish6-varnish-libs-0:6.0.13-1.el7.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Workstation-RHSCL-3.8:rh-varnish6-varnish-libs-0:6.0.13-1.el7.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Workstation-RHSCL-3.8:rh-varnish6-varnish-libs-0:6.0.13-1.el7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Workstation-RHSCL-3.8:rh-varnish6-varnish-modules-0:0.15.0-8.el7.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Workstation-RHSCL-3.8:rh-varnish6-varnish-modules-0:0.15.0-8.el7.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Workstation-RHSCL-3.8:rh-varnish6-varnish-modules-0:0.15.0-8.el7.src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Workstation-RHSCL-3.8:rh-varnish6-varnish-modules-0:0.15.0-8.el7.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Workstation-RHSCL-3.8:rh-varnish6-varnish-modules-debuginfo-0:0.15.0-8.el7.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Workstation-RHSCL-3.8:rh-varnish6-varnish-modules-debuginfo-0:0.15.0-8.el7.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: 7Workstation-RHSCL-3.8:rh-varnish6-varnish-modules-debuginfo-0:0.15.0-8.el7.x86_64 | — |
Vendor Fix
fix
Workaround
|
{
"document": {
"aggregate_severity": {
"namespace": "https://access.redhat.com/security/updates/classification/",
"text": "Important"
},
"category": "csaf_security_advisory",
"csaf_version": "2.0",
"distribution": {
"text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.",
"tlp": {
"label": "WHITE",
"url": "https://www.first.org/tlp/"
}
},
"lang": "en",
"notes": [
{
"category": "summary",
"text": "An update for rh-varnish6-varnish is now available for Red Hat Software Collections.\n\nRed Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.",
"title": "Topic"
},
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"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2024:1689"
},
{
"category": "workaround",
"details": "A possible mitigation for this issue is to disable http2 support until the package can be updated.\nThis can be performed by running the following command:\n\n~~~\nvarnishadm param.set feature -http2\n~~~\n\nNote: you must remove `h2` from the list of protocols if your TLS terminator is advertising it with ALPN.\n\nIt\u0027s also possible to use the `MAIN.sc_bankrupt` counter to monitor possible on-going attacks to the varnish server.",
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"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
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"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "varnish: HTTP/2 Broken Window Attack may result in denial of service"
}
]
}
RHSA-2024_1690
Vulnerability from csaf_redhat - Published: 2024-04-08 09:21 - Updated: 2024-11-15 18:35A flaw was found in the Varnish cache server, with HTTP/2 support enabled, that may allow a Denial of Service type of attack. A malicious actor can cause the server to run out of credits during the HTTP/2 connection control flow. As a consequence, the server will stop to properly process the active HTTP streams, retaining the already allocated resources, leading to resource starvation.
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-8.9.0.Z.MAIN:varnish:6:8090020240328195416:a75119d5 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.9.0.Z.MAIN:varnish:6:8090020240328195416:a75119d5:varnish-0:6.0.13-1.module+el8.9.0+21617+7578fa11.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.9.0.Z.MAIN:varnish:6:8090020240328195416:a75119d5:varnish-0:6.0.13-1.module+el8.9.0+21617+7578fa11.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.9.0.Z.MAIN:varnish:6:8090020240328195416:a75119d5:varnish-0:6.0.13-1.module+el8.9.0+21617+7578fa11.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.9.0.Z.MAIN:varnish:6:8090020240328195416:a75119d5:varnish-0:6.0.13-1.module+el8.9.0+21617+7578fa11.src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.9.0.Z.MAIN:varnish:6:8090020240328195416:a75119d5:varnish-0:6.0.13-1.module+el8.9.0+21617+7578fa11.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.9.0.Z.MAIN:varnish:6:8090020240328195416:a75119d5:varnish-devel-0:6.0.13-1.module+el8.9.0+21617+7578fa11.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.9.0.Z.MAIN:varnish:6:8090020240328195416:a75119d5:varnish-devel-0:6.0.13-1.module+el8.9.0+21617+7578fa11.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.9.0.Z.MAIN:varnish:6:8090020240328195416:a75119d5:varnish-devel-0:6.0.13-1.module+el8.9.0+21617+7578fa11.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.9.0.Z.MAIN:varnish:6:8090020240328195416:a75119d5:varnish-devel-0:6.0.13-1.module+el8.9.0+21617+7578fa11.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.9.0.Z.MAIN:varnish:6:8090020240328195416:a75119d5:varnish-docs-0:6.0.13-1.module+el8.9.0+21617+7578fa11.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.9.0.Z.MAIN:varnish:6:8090020240328195416:a75119d5:varnish-docs-0:6.0.13-1.module+el8.9.0+21617+7578fa11.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.9.0.Z.MAIN:varnish:6:8090020240328195416:a75119d5:varnish-docs-0:6.0.13-1.module+el8.9.0+21617+7578fa11.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.9.0.Z.MAIN:varnish:6:8090020240328195416:a75119d5:varnish-docs-0:6.0.13-1.module+el8.9.0+21617+7578fa11.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.9.0.Z.MAIN:varnish:6:8090020240328195416:a75119d5:varnish-modules-0:0.15.0-6.module+el8.9.0+21617+7578fa11.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.9.0.Z.MAIN:varnish:6:8090020240328195416:a75119d5:varnish-modules-0:0.15.0-6.module+el8.9.0+21617+7578fa11.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.9.0.Z.MAIN:varnish:6:8090020240328195416:a75119d5:varnish-modules-0:0.15.0-6.module+el8.9.0+21617+7578fa11.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.9.0.Z.MAIN:varnish:6:8090020240328195416:a75119d5:varnish-modules-0:0.15.0-6.module+el8.9.0+21617+7578fa11.src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.9.0.Z.MAIN:varnish:6:8090020240328195416:a75119d5:varnish-modules-0:0.15.0-6.module+el8.9.0+21617+7578fa11.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.9.0.Z.MAIN:varnish:6:8090020240328195416:a75119d5:varnish-modules-debuginfo-0:0.15.0-6.module+el8.9.0+21617+7578fa11.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.9.0.Z.MAIN:varnish:6:8090020240328195416:a75119d5:varnish-modules-debuginfo-0:0.15.0-6.module+el8.9.0+21617+7578fa11.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.9.0.Z.MAIN:varnish:6:8090020240328195416:a75119d5:varnish-modules-debuginfo-0:0.15.0-6.module+el8.9.0+21617+7578fa11.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.9.0.Z.MAIN:varnish:6:8090020240328195416:a75119d5:varnish-modules-debuginfo-0:0.15.0-6.module+el8.9.0+21617+7578fa11.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.9.0.Z.MAIN:varnish:6:8090020240328195416:a75119d5:varnish-modules-debugsource-0:0.15.0-6.module+el8.9.0+21617+7578fa11.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.9.0.Z.MAIN:varnish:6:8090020240328195416:a75119d5:varnish-modules-debugsource-0:0.15.0-6.module+el8.9.0+21617+7578fa11.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.9.0.Z.MAIN:varnish:6:8090020240328195416:a75119d5:varnish-modules-debugsource-0:0.15.0-6.module+el8.9.0+21617+7578fa11.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-8.9.0.Z.MAIN:varnish:6:8090020240328195416:a75119d5:varnish-modules-debugsource-0:0.15.0-6.module+el8.9.0+21617+7578fa11.x86_64 | — |
Vendor Fix
fix
Workaround
|
{
"document": {
"aggregate_severity": {
"namespace": "https://access.redhat.com/security/updates/classification/",
"text": "Important"
},
"category": "csaf_security_advisory",
"csaf_version": "2.0",
"distribution": {
"text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.",
"tlp": {
"label": "WHITE",
"url": "https://www.first.org/tlp/"
}
},
"lang": "en",
"notes": [
{
"category": "summary",
"text": "An update for varnish is now available for Red Hat Enterprise Linux 8.\n\nRed Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.",
"title": "Topic"
},
{
"category": "general",
"text": "Varnish Cache is a high-performance HTTP accelerator. It stores web pages in memory so web servers don\u0027t have to create the same web page over and over again, giving the website a significant speed up.\n\nSecurity Fix(es):\n\n* varnish: HTTP/2 Broken Window Attack may result in denial of service (CVE-2024-30156)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
"title": "Details"
},
{
"category": "legal_disclaimer",
"text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.",
"title": "Terms of Use"
}
],
"publisher": {
"category": "vendor",
"contact_details": "https://access.redhat.com/security/team/contact/",
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"text": "A flaw was found in the Varnish cache server, with HTTP/2 support enabled, that may allow a Denial of Service type of attack. A malicious actor can cause the server to run out of credits during the HTTP/2 connection control flow. As a consequence, the server will stop to properly process the active HTTP streams, retaining the already allocated resources, leading to resource starvation.",
"title": "Vulnerability description"
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"text": "varnish: HTTP/2 Broken Window Attack may result in denial of service",
"title": "Vulnerability summary"
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"category": "other",
"text": "CVE-2024-30156 represents a important severity issue due to its potential to cause widespread denial of service (DoS) across Varnish Cacher servers with HTTP/2 protocol enabled. By exploiting this vulnerability, attackers can exhaust the server\u0027s HTTP/2 connection control flow window credits, thereby halting the processing of streams and indefinitely retaining associated resources. This can lead to a complete service outage, impacting the availability and performance of web services relying on Varnish Cache. Given the prevalence of HTTP/2 adoption for its performance benefits, the vulnerability poses a significant risk to web infrastructure, necessitating immediate mitigation measures to prevent exploitation and mitigate the impact on affected systems.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2024-30156"
},
{
"category": "external",
"summary": "RHBZ#2271486",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2271486"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2024-30156",
"url": "https://www.cve.org/CVERecord?id=CVE-2024-30156"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2024-30156",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-30156"
},
{
"category": "external",
"summary": "https://varnish-cache.org/security/VSV00014.html",
"url": "https://varnish-cache.org/security/VSV00014.html"
}
],
"release_date": "2024-03-24T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2024-04-08T09:21:57+00:00",
"details": "Before applying this update, make sure all previously released errata\nrelevant to your system have been applied.\n\nFor details on how to apply this update, refer to:\n\nhttps://access.redhat.com/articles/11258",
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],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2024:1690"
},
{
"category": "workaround",
"details": "A possible mitigation for this issue is to disable http2 support until the package can be updated.\nThis can be performed by running the following command:\n\n~~~\nvarnishadm param.set feature -http2\n~~~\n\nNote: you must remove `h2` from the list of protocols if your TLS terminator is advertising it with ALPN.\n\nIt\u0027s also possible to use the `MAIN.sc_bankrupt` counter to monitor possible on-going attacks to the varnish server.",
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}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
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}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "varnish: HTTP/2 Broken Window Attack may result in denial of service"
}
]
}
RHSA-2024_1691
Vulnerability from csaf_redhat - Published: 2024-04-08 09:19 - Updated: 2024-11-15 18:35A flaw was found in the Varnish cache server, with HTTP/2 support enabled, that may allow a Denial of Service type of attack. A malicious actor can cause the server to run out of credits during the HTTP/2 connection control flow. As a consequence, the server will stop to properly process the active HTTP streams, retaining the already allocated resources, leading to resource starvation.
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-9.3.0.Z.MAIN:varnish-0:6.6.2-4.el9_3.1.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.3.0.Z.MAIN:varnish-0:6.6.2-4.el9_3.1.i686 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.3.0.Z.MAIN:varnish-0:6.6.2-4.el9_3.1.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.3.0.Z.MAIN:varnish-0:6.6.2-4.el9_3.1.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.3.0.Z.MAIN:varnish-0:6.6.2-4.el9_3.1.src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.3.0.Z.MAIN:varnish-0:6.6.2-4.el9_3.1.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.3.0.Z.MAIN:varnish-devel-0:6.6.2-4.el9_3.1.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.3.0.Z.MAIN:varnish-devel-0:6.6.2-4.el9_3.1.i686 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.3.0.Z.MAIN:varnish-devel-0:6.6.2-4.el9_3.1.ppc64le | — |
Vendor Fix
fix
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],
"title": "varnish: HTTP/2 Broken Window Attack may result in denial of service"
}
]
}
RHSA-2024_2700
Vulnerability from csaf_redhat - Published: 2024-05-06 06:48 - Updated: 2024-11-15 18:36A flaw was found in the Varnish cache server, with HTTP/2 support enabled, that may allow a Denial of Service type of attack. A malicious actor can cause the server to run out of credits during the HTTP/2 connection control flow. As a consequence, the server will stop to properly process the active HTTP streams, retaining the already allocated resources, leading to resource starvation.
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-9.0.0.Z.EUS:varnish-0:6.6.2-2.el9_0.3.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.0.0.Z.EUS:varnish-0:6.6.2-2.el9_0.3.i686 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.0.0.Z.EUS:varnish-0:6.6.2-2.el9_0.3.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.0.0.Z.EUS:varnish-0:6.6.2-2.el9_0.3.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.0.0.Z.EUS:varnish-0:6.6.2-2.el9_0.3.src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.0.0.Z.EUS:varnish-0:6.6.2-2.el9_0.3.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.0.0.Z.EUS:varnish-devel-0:6.6.2-2.el9_0.3.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.0.0.Z.EUS:varnish-devel-0:6.6.2-2.el9_0.3.i686 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.0.0.Z.EUS:varnish-devel-0:6.6.2-2.el9_0.3.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.0.0.Z.EUS:varnish-devel-0:6.6.2-2.el9_0.3.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.0.0.Z.EUS:varnish-devel-0:6.6.2-2.el9_0.3.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.0.0.Z.EUS:varnish-docs-0:6.6.2-2.el9_0.3.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.0.0.Z.EUS:varnish-docs-0:6.6.2-2.el9_0.3.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.0.0.Z.EUS:varnish-docs-0:6.6.2-2.el9_0.3.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.0.0.Z.EUS:varnish-docs-0:6.6.2-2.el9_0.3.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.0.0.Z.EUS:varnish-0:6.6.2-2.el9_0.3.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.0.0.Z.EUS:varnish-0:6.6.2-2.el9_0.3.i686 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.0.0.Z.EUS:varnish-0:6.6.2-2.el9_0.3.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.0.0.Z.EUS:varnish-0:6.6.2-2.el9_0.3.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.0.0.Z.EUS:varnish-0:6.6.2-2.el9_0.3.src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.0.0.Z.EUS:varnish-0:6.6.2-2.el9_0.3.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.0.0.Z.EUS:varnish-devel-0:6.6.2-2.el9_0.3.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.0.0.Z.EUS:varnish-devel-0:6.6.2-2.el9_0.3.i686 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.0.0.Z.EUS:varnish-devel-0:6.6.2-2.el9_0.3.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.0.0.Z.EUS:varnish-devel-0:6.6.2-2.el9_0.3.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.0.0.Z.EUS:varnish-devel-0:6.6.2-2.el9_0.3.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.0.0.Z.EUS:varnish-docs-0:6.6.2-2.el9_0.3.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.0.0.Z.EUS:varnish-docs-0:6.6.2-2.el9_0.3.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.0.0.Z.EUS:varnish-docs-0:6.6.2-2.el9_0.3.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.0.0.Z.EUS:varnish-docs-0:6.6.2-2.el9_0.3.x86_64 | — |
Vendor Fix
fix
Workaround
|
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"scope": "UNCHANGED",
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"title": "varnish: HTTP/2 Broken Window Attack may result in denial of service"
}
]
}
RHSA-2024_2820
Vulnerability from csaf_redhat - Published: 2024-05-13 01:26 - Updated: 2024-11-15 18:36A flaw was found in the Varnish cache server, with HTTP/2 support enabled, that may allow a Denial of Service type of attack. A malicious actor can cause the server to run out of credits during the HTTP/2 connection control flow. As a consequence, the server will stop to properly process the active HTTP streams, retaining the already allocated resources, leading to resource starvation.
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-9.2.0.Z.EUS:varnish-0:6.6.2-3.el9_2.2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.2.0.Z.EUS:varnish-0:6.6.2-3.el9_2.2.i686 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.2.0.Z.EUS:varnish-0:6.6.2-3.el9_2.2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.2.0.Z.EUS:varnish-0:6.6.2-3.el9_2.2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.2.0.Z.EUS:varnish-0:6.6.2-3.el9_2.2.src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.2.0.Z.EUS:varnish-0:6.6.2-3.el9_2.2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.2.0.Z.EUS:varnish-devel-0:6.6.2-3.el9_2.2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.2.0.Z.EUS:varnish-devel-0:6.6.2-3.el9_2.2.i686 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.2.0.Z.EUS:varnish-devel-0:6.6.2-3.el9_2.2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.2.0.Z.EUS:varnish-devel-0:6.6.2-3.el9_2.2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.2.0.Z.EUS:varnish-devel-0:6.6.2-3.el9_2.2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.2.0.Z.EUS:varnish-docs-0:6.6.2-3.el9_2.2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.2.0.Z.EUS:varnish-docs-0:6.6.2-3.el9_2.2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.2.0.Z.EUS:varnish-docs-0:6.6.2-3.el9_2.2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-9.2.0.Z.EUS:varnish-docs-0:6.6.2-3.el9_2.2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.2.0.Z.EUS:varnish-0:6.6.2-3.el9_2.2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.2.0.Z.EUS:varnish-0:6.6.2-3.el9_2.2.i686 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.2.0.Z.EUS:varnish-0:6.6.2-3.el9_2.2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.2.0.Z.EUS:varnish-0:6.6.2-3.el9_2.2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.2.0.Z.EUS:varnish-0:6.6.2-3.el9_2.2.src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.2.0.Z.EUS:varnish-0:6.6.2-3.el9_2.2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.2.0.Z.EUS:varnish-devel-0:6.6.2-3.el9_2.2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.2.0.Z.EUS:varnish-devel-0:6.6.2-3.el9_2.2.i686 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.2.0.Z.EUS:varnish-devel-0:6.6.2-3.el9_2.2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.2.0.Z.EUS:varnish-devel-0:6.6.2-3.el9_2.2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.2.0.Z.EUS:varnish-devel-0:6.6.2-3.el9_2.2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.2.0.Z.EUS:varnish-docs-0:6.6.2-3.el9_2.2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.2.0.Z.EUS:varnish-docs-0:6.6.2-3.el9_2.2.ppc64le | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.2.0.Z.EUS:varnish-docs-0:6.6.2-3.el9_2.2.s390x | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: CRB-9.2.0.Z.EUS:varnish-docs-0:6.6.2-3.el9_2.2.x86_64 | — |
Vendor Fix
fix
Workaround
|
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"text": "A flaw was found in the Varnish cache server, with HTTP/2 support enabled, that may allow a Denial of Service type of attack. A malicious actor can cause the server to run out of credits during the HTTP/2 connection control flow. As a consequence, the server will stop to properly process the active HTTP streams, retaining the already allocated resources, leading to resource starvation.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "varnish: HTTP/2 Broken Window Attack may result in denial of service",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "CVE-2024-30156 represents a important severity issue due to its potential to cause widespread denial of service (DoS) across Varnish Cacher servers with HTTP/2 protocol enabled. By exploiting this vulnerability, attackers can exhaust the server\u0027s HTTP/2 connection control flow window credits, thereby halting the processing of streams and indefinitely retaining associated resources. This can lead to a complete service outage, impacting the availability and performance of web services relying on Varnish Cache. Given the prevalence of HTTP/2 adoption for its performance benefits, the vulnerability poses a significant risk to web infrastructure, necessitating immediate mitigation measures to prevent exploitation and mitigate the impact on affected systems.",
"title": "Statement"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
"product_status": {
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2024-30156"
},
{
"category": "external",
"summary": "RHBZ#2271486",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2271486"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2024-30156",
"url": "https://www.cve.org/CVERecord?id=CVE-2024-30156"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2024-30156",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-30156"
},
{
"category": "external",
"summary": "https://varnish-cache.org/security/VSV00014.html",
"url": "https://varnish-cache.org/security/VSV00014.html"
}
],
"release_date": "2024-03-24T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2024-05-13T01:26:24+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2024:2820"
},
{
"category": "workaround",
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"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
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"threats": [
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"details": "Important"
}
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"title": "varnish: HTTP/2 Broken Window Attack may result in denial of service"
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}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.