rhsa-2023_6023
Vulnerability from csaf_redhat
Published
2023-10-23 12:00
Modified
2024-11-06 03:59
Summary
Red Hat Security Advisory: varnish:6 security update

Notes

Topic
An update for the varnish:6 module is now available for Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions. Red 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.
Details
Varnish Cache is a high-performance HTTP accelerator. It stores web pages in memory so web servers don't have to create the same web page over and over again, giving the website a significant speed up. Security Fix(es): * HTTP/2: Multiple HTTP/2 enabled web servers are vulnerable to a DDoS attack (Rapid Reset Attack) (CVE-2023-44487) 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.
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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        "id": "CWE-400",
        "name": "Uncontrolled Resource Consumption"
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      "discovery_date": "2023-10-09T00:00:00+00:00",
      "ids": [
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          "text": "2242803"
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          "category": "description",
          "text": "A flaw was found in handling multiplexed streams in the HTTP/2 protocol. A client can repeatedly make a request for a new multiplex stream and immediately send an RST_STREAM frame to cancel it. This creates extra work for the server setting up and tearing down the streams while not hitting any server-side limit for the maximum number of active streams per connection, resulting in a denial of service due to server resource consumption. Red Hat has rated the severity of this flaw as \u0027Important\u0027 as the US Cybersecurity and Infrastructure Security Agency (CISA) declared this vulnerability an active exploit.\r\n\r\nCVE-2023-39325 was assigned for the Rapid Reset Attack in the Go language packages.\r\n\r\nSecurity Bulletin\r\nhttps://access.redhat.com/security/vulnerabilities/RHSB-2023-003",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "HTTP/2: Multiple HTTP/2 enabled web servers are vulnerable to a DDoS attack (Rapid Reset Attack)",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "NGINX has been marked as Moderate Impact because, for performance and resource consumption reasons, NGINX limits the number of concurrent streams to a default of 128. In addition, to optimally balance network and server performance, NGINX allows the client to persist HTTP connections for up to 1000 requests by default using an HTTP keepalive.\n\nThe majority of RHEL utilities are not long-running applications; instead, they are command-line tools. These tools utilize Golang package as build-time dependency, which is why they are classified as having a \"Moderate\" level of impact.\n\nrhc component is no longer impacted by CVE-2023-44487 \u0026 CVE-2023-39325.",
          "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",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2023-44487"
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          "url": "https://www.cve.org/CVERecord?id=CVE-2023-44487"
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        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2023-44487",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-44487"
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          "category": "external",
          "summary": "https://github.com/dotnet/announcements/issues/277",
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          "summary": "https://www.cisa.gov/news-events/alerts/2023/10/10/http2-rapid-reset-vulnerability-cve-2023-44487",
          "url": "https://www.cisa.gov/news-events/alerts/2023/10/10/http2-rapid-reset-vulnerability-cve-2023-44487"
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          "summary": "https://www.nginx.com/blog/http-2-rapid-reset-attack-impacting-f5-nginx-products/",
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          "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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            "AppStream-8.1.0.Z.E4S:varnish:6:8010020231019161354:c27ad7f8:varnish-modules-debuginfo-0:0.15.0-4.module+el8+2481+4078e9d2.ppc64le",
            "AppStream-8.1.0.Z.E4S:varnish:6:8010020231019161354:c27ad7f8:varnish-modules-debuginfo-0:0.15.0-4.module+el8+2481+4078e9d2.x86_64",
            "AppStream-8.1.0.Z.E4S:varnish:6:8010020231019161354:c27ad7f8:varnish-modules-debugsource-0:0.15.0-4.module+el8+2481+4078e9d2.ppc64le",
            "AppStream-8.1.0.Z.E4S:varnish:6:8010020231019161354:c27ad7f8:varnish-modules-debugsource-0:0.15.0-4.module+el8+2481+4078e9d2.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "exploit_status",
          "date": "2023-10-10T00:00:00+00:00",
          "details": "CISA: https://www.cisa.gov/known-exploited-vulnerabilities-catalog"
        },
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "HTTP/2: Multiple HTTP/2 enabled web servers are vulnerable to a DDoS attack (Rapid Reset Attack)"
    }
  ]
}


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