rhsa-2023_7465
Vulnerability from csaf_redhat
Published
2023-11-22 17:28
Modified
2024-11-12 19:51
Summary
Red Hat Security Advisory: squid security update

Notes

Topic
An update for squid is now available for Red Hat Enterprise Linux 9. 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
Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects. Security Fix(es): * squid: DoS against HTTP and HTTPS (CVE-2023-5824) 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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  "vulnerabilities": [
    {
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      "cwe": {
        "id": "CWE-755",
        "name": "Improper Handling of Exceptional Conditions"
      },
      "discovery_date": "2023-10-24T00:00:00+00:00",
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          "text": "2245914"
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          "category": "description",
          "text": "A flaw was found in Squid. The limits applied for validation of HTTP response headers are applied before caching. However, Squid may grow a cached HTTP response header beyond the configured maximum size, causing a stall or crash of the worker process when a large header is retrieved from the disk cache, resulting in a denial of service.",
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          "category": "summary",
          "text": "squid: DoS against HTTP and HTTPS",
          "title": "Vulnerability summary"
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        {
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          "text": "This vulnerability only affects configurations with the `cache_dir` directive enabled. If this directive is not enabled, the Squid server is not vulnerable and no further mitigation is needed. For more information about the mitigation, see the mitigation section below.\n\nThe `cache_dir` directive is disabled by default in Squid shipped in Red Hat Enterprise Linux 6, 7, 8 and 9. Therefore, these Red Hat Enterprise Linux versions are not vulnerable with the default configuration.\n\nRed Hat is not planning to address this issue in Red Hat Enterprise Linux 6 and 7 due to the changes required and the magnitude of the differences between Squid 3 and 4 code bases, backporting the changes to the Squid 3 code base has not been feasible.\n\nWe recommend that customers using Squid as a caching proxy on Red Hat Enterprise Linux 6 and 7 to upgrade to Red Hat Enterprise Linux 8 and 9 to use Squid version 4 or version 5, respectively. Alternatively, see the mitigation section below for a way to workaround this vulnerability.",
          "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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          "summary": "RHBZ#2245914",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2245914"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2023-5824",
          "url": "https://www.cve.org/CVERecord?id=CVE-2023-5824"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2023-5824",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-5824"
        },
        {
          "category": "external",
          "summary": "https://github.com/squid-cache/squid/security/advisories/GHSA-543m-w2m2-g255",
          "url": "https://github.com/squid-cache/squid/security/advisories/GHSA-543m-w2m2-g255"
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      "release_date": "2023-10-19T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2023-11-22T17:28:07+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\n\nAfter installing this update, the squid service will be restarted automatically.",
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          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2023:7465"
        },
        {
          "category": "workaround",
          "details": "Disabling the disk caching mechanism will mitigate this vulnerability. To achieve this, remove all the \u0027cache_dir\u0027 directives from the Squid configuration, typically in the /etc/squid/squid.conf file.",
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      "scores": [
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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",
            "version": "3.1"
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      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "squid: DoS against HTTP and HTTPS"
    },
    {
      "cve": "CVE-2023-49288",
      "cwe": {
        "id": "CWE-416",
        "name": "Use After Free"
      },
      "discovery_date": "2023-12-05T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2252918"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in Squid. The use of the HTTP Collapsed Forwarding configuration may allow an attacker to perform a denial of service remotely.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "squid: Use-After-Free in the HTTP Collapsed Forwarding Feature",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Collapsed Forwarding features are only used in Squid for accelerator servers and is not enabled by default, lowering the severity of this flaw to Moderate.",
          "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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          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2023-49288"
        },
        {
          "category": "external",
          "summary": "RHBZ#2252918",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2252918"
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        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2023-49288",
          "url": "https://www.cve.org/CVERecord?id=CVE-2023-49288"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2023-49288",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-49288"
        }
      ],
      "release_date": "2023-12-05T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2023-11-22T17:28:07+00:00",
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        },
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      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "squid: Use-After-Free in the HTTP Collapsed Forwarding Feature"
    }
  ]
}


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