rhsa-2022_7622
Vulnerability from csaf_redhat
Published
2022-11-08 10:08
Modified
2024-11-06 01:57
Summary
Red Hat Security Advisory: unbound security, bug fix, and enhancement update
Notes
Topic
An update for unbound is now available for Red Hat Enterprise Linux 8.
Red Hat Product Security has rated this update as having a security impact of Moderate. 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.
Details
The unbound packages provide a validating, recursive, and caching DNS or DNSSEC resolver.
The following packages have been upgraded to a later upstream version: unbound (1.16.2). (BZ#2027735)
Security Fix(es):
* unbound: the novel ghost domain where malicious users to trigger continued resolvability of malicious domain names (CVE-2022-30698)
* unbound: novel ghost domain attack where malicious users to trigger continued resolvability of malicious domain names (CVE-2022-30699)
For 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.
Additional Changes:
For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.7 Release Notes linked from the References section.
Terms of Use
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.
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"category": "description",
"text": "A flaw was found in unbound. An integer overflow in the regional allocator via the ALIGN_UP macro may lead to a buffer overflow if the size can be controlled by an attacker. The highest threat from this vulnerability is to data confidentiality and integrity as well as service availability.",
"title": "Vulnerability description"
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{
"category": "summary",
"text": "unbound: integer overflow in the regional allocator via the ALIGN_UP macro",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "There is no available reproducer or proof of concept for this issue, nor it was ever proven the buffer overflow can happen in practice. Indeed this issue was initially considered just as \"side-finding\", according to the original report, and for this reason its Impact is Moderate. Upstream has also disputed this CVE.",
"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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{
"category": "self",
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},
{
"category": "external",
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{
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},
{
"category": "external",
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"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-25033"
}
],
"release_date": "2019-12-11T00:00:00+00:00",
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"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
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"title": "unbound: integer overflow in the regional allocator via the ALIGN_UP macro"
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{
"cve": "CVE-2022-30698",
"cwe": {
"id": "CWE-613",
"name": "Insufficient Session Expiration"
},
"discovery_date": "2022-08-09T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2116725"
}
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"notes": [
{
"category": "description",
"text": "A flaw was found in Unbound, which is vulnerable to a novel type of \"ghost domain names\" attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a subdomain of a rogue domain name. The rogue nameserver returns delegation information for the subdomain that updates Unbound\u0027s delegation cache. This action can be repeated before the expiry of the delegation information by querying Unbound for a second-level subdomain in which the rogue nameserver provides new delegation information. Since Unbound is a child-centric resolver, the ever-updating child delegation information can keep a rogue domain name resolvable long after revocation.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "unbound: novel ghost domain attack that allows attackers to trigger continued resolvability of malicious domain names",
"title": "Vulnerability summary"
},
{
"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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{
"category": "impact",
"details": "Moderate"
}
],
"title": "unbound: novel ghost domain attack that allows attackers to trigger continued resolvability of malicious domain names"
},
{
"cve": "CVE-2022-30699",
"cwe": {
"id": "CWE-613",
"name": "Insufficient Session Expiration"
},
"discovery_date": "2022-08-09T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2116729"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in Unbound, which is vulnerable to a novel type of \"ghost domain names\" attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a subdomain of a rogue domain name. The rogue nameserver returns delegation information for the subdomain that updates Unbound\u0027s delegation cache. This action can be repeated before the expiry of the delegation information by querying Unbound for a second-level subdomain in which the rogue nameserver provides new delegation information. Since Unbound is a child-centric resolver, the ever-updating child delegation information can keep a rogue domain name resolvable long after revocation.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "unbound: novel ghost domain attack that allows attackers to trigger continued resolvability of malicious domain names",
"title": "Vulnerability summary"
},
{
"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-2022-30699"
},
{
"category": "external",
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"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2116729"
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{
"category": "external",
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"url": "https://www.cve.org/CVERecord?id=CVE-2022-30699"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2022-30699",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-30699"
}
],
"release_date": "2022-08-01T00:00:00+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2022-11-08T10:08:39+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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],
"title": "unbound: novel ghost domain attack that allows attackers to trigger continued resolvability of malicious domain names"
}
]
}
Loading...
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- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.