rhsa-2011_1791
Vulnerability from csaf_redhat
Published
2011-12-06 21:18
Modified
2024-11-05 17:39
Summary
Red Hat Security Advisory: squid security update

Notes

Topic
An updated squid package that fixes one security issue is now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.
Details
Squid is a high-performance proxy caching server for web clients, supporting FTP, Gopher, and HTTP data objects. An input validation flaw was found in the way Squid calculated the total number of resource records in the answer section of multiple name server responses. An attacker could use this flaw to cause Squid to crash. (CVE-2011-4096) Users of squid should upgrade to this updated package, which contains a backported patch to correct this issue. After installing this update, the squid service will be restarted automatically.
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.


To clipboard 

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      "discovery_date": "2011-10-30T00:00:00+00:00",
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          "text": "750316"
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          "category": "description",
          "text": "The idnsGrokReply function in Squid before 3.1.16 does not properly free memory, which allows remote attackers to cause a denial of service (daemon abort) via a DNS reply containing a CNAME record that references another CNAME record that contains an empty A record.",
          "title": "Vulnerability description"
        },
        {
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          "text": "squid: Invalid free by processing CNAME DNS record pointing to another CNAME record pointing to an empty A-record",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This issue did not affect the versions of squid as shipped with Red Hat Enterprise Linux 4 and 5 as they did not include IPv6 support. This issue was introduced with the addition of IPv6 support in Squid 3.1 (in the changes made to the idnsGrokReply function).",
          "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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          "6Workstation-6.2.z:squid-debuginfo-7:3.1.10-1.el6_2.1.x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2011-4096"
        },
        {
          "category": "external",
          "summary": "RHBZ#750316",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=750316"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2011-4096",
          "url": "https://www.cve.org/CVERecord?id=CVE-2011-4096"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2011-4096",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2011-4096"
        }
      ],
      "release_date": "2011-06-06T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2011-12-06T21:18:00+00:00",
          "details": "Before applying this update, make sure all previously-released errata\nrelevant to your system have been applied.\n\nThis update is available via the Red Hat Network. Details on how to\nuse the Red Hat Network to apply this update are available at\nhttps://access.redhat.com/kb/docs/DOC-11259",
          "product_ids": [
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            "6Server-6.2.z:squid-7:3.1.10-1.el6_2.1.s390x",
            "6Server-6.2.z:squid-7:3.1.10-1.el6_2.1.src",
            "6Server-6.2.z:squid-7:3.1.10-1.el6_2.1.x86_64",
            "6Server-6.2.z:squid-debuginfo-7:3.1.10-1.el6_2.1.i686",
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            "6Server-6.2.z:squid-debuginfo-7:3.1.10-1.el6_2.1.x86_64",
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            "6Workstation-6.2.z:squid-7:3.1.10-1.el6_2.1.ppc64",
            "6Workstation-6.2.z:squid-7:3.1.10-1.el6_2.1.s390x",
            "6Workstation-6.2.z:squid-7:3.1.10-1.el6_2.1.src",
            "6Workstation-6.2.z:squid-7:3.1.10-1.el6_2.1.x86_64",
            "6Workstation-6.2.z:squid-debuginfo-7:3.1.10-1.el6_2.1.i686",
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          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2011:1791"
        }
      ],
      "scores": [
        {
          "cvss_v2": {
            "accessComplexity": "LOW",
            "accessVector": "ADJACENT_NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 3.3,
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "vectorString": "AV:A/AC:L/Au:N/C:N/I:N/A:P",
            "version": "2.0"
          },
          "products": [
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          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "squid: Invalid free by processing CNAME DNS record pointing to another CNAME record pointing to an empty A-record"
    }
  ]
}


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