rhsa-2004:134
Vulnerability from csaf_redhat
Published
2004-03-29 07:10
Modified
2024-11-21 23:00
Summary
Red Hat Security Advisory: : Updated squid package fixes security vulnerability

Notes

Topic
An updated squid package is avaliable that fixes a security vulnerability in URL decoding and provides a new ACL type for protecting vulnerable clients.
Details
Squid is a full-featured Web proxy cache. A bug was found in the processing of %-encoded characters in a URL in versions of Squid 2.5.STABLE4 and earlier. If a Squid configuration uses Access Control Lists (ACLs), a remote attacker could create URLs that would not be correctly tested against Squid's ACLs, potentially allowing clients to access prohibited URLs. Users of Squid should update to these erratum packages which are not vulnerable to this issue. In addition, these packages contain a new Access Control type, "urllogin", which can be used to protect vulnerable Microsoft Internet Explorer clients from accessing URLs that contain login information. Such URLs are often used by fraudsters to trick web users into revealing valuable personal data. Note that the default Squid configuration does not make use of this new access control type. You must explicitly configure Squid with ACLs that use this new type, in accordance with your own site policies.
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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{
  "document": {
    "aggregate_severity": {
      "namespace": "https://access.redhat.com/security/updates/classification/",
      "text": "Low"
    },
    "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 updated squid package is avaliable that fixes a security vulnerability in\nURL decoding and provides a new ACL type for protecting vulnerable clients.",
        "title": "Topic"
      },
      {
        "category": "general",
        "text": "Squid is a full-featured Web proxy cache.\n\nA bug was found in the processing of %-encoded characters in a URL in\nversions of Squid 2.5.STABLE4 and earlier.  If a Squid configuration uses\nAccess Control Lists (ACLs), a remote attacker could create URLs that would\nnot be correctly tested against Squid\u0027s ACLs, potentially allowing clients\nto access prohibited URLs.\n\nUsers of Squid should update to these erratum packages which are not\nvulnerable to this issue.\n\nIn addition, these packages contain a new Access Control type, \"urllogin\",\nwhich can be used to protect vulnerable Microsoft Internet Explorer clients\nfrom accessing URLs that contain login information.  Such URLs are often\nused by fraudsters to trick web users into revealing valuable personal data.\n\nNote that the default Squid configuration does not make use of this new\naccess control type.  You must explicitly configure Squid with ACLs that\nuse this new type, in accordance with your own site policies.",
        "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/",
      "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.",
      "name": "Red Hat Product Security",
      "namespace": "https://www.redhat.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "https://access.redhat.com/errata/RHSA-2004:134",
        "url": "https://access.redhat.com/errata/RHSA-2004:134"
      },
      {
        "category": "external",
        "summary": "http://www.squid-cache.org/Advisories/SQUID-2004_1.txt",
        "url": "http://www.squid-cache.org/Advisories/SQUID-2004_1.txt"
      },
      {
        "category": "external",
        "summary": "http://www.microsoft.com/security/incident/spoof.asp",
        "url": "http://www.microsoft.com/security/incident/spoof.asp"
      },
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2004/rhsa-2004_134.json"
      }
    ],
    "title": "Red Hat Security Advisory: : Updated squid package fixes security vulnerability",
    "tracking": {
      "current_release_date": "2024-11-21T23:00:36+00:00",
      "generator": {
        "date": "2024-11-21T23:00:36+00:00",
        "engine": {
          "name": "Red Hat SDEngine",
          "version": "4.2.1"
        }
      },
      "id": "RHSA-2004:134",
      "initial_release_date": "2004-03-29T07:10:00+00:00",
      "revision_history": [
        {
          "date": "2004-03-29T07:10:00+00:00",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2004-03-29T00:00:00+00:00",
          "number": "2",
          "summary": "Last updated version"
        },
        {
          "date": "2024-11-21T23:00:36+00:00",
          "number": "3",
          "summary": "Last generated version"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_name",
                "name": "Red Hat Linux 9",
                "product": {
                  "name": "Red Hat Linux 9",
                  "product_id": "Red Hat Linux 9",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:redhat:linux:9"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "Red Hat Linux"
          }
        ],
        "category": "vendor",
        "name": "Red Hat"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2004-0189",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1617177"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "The \"%xx\" URL decoding function in Squid 2.5STABLE4 and earlier allows remote attackers to bypass url_regex ACLs via a URL with a NULL (\"%00\") character, which causes Squid to use only a portion of the requested URL when comparing it against the access control lists.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "security flaw",
          "title": "Vulnerability summary"
        }
      ],
      "product_status": {
        "fixed": [
          "Red Hat Linux 9"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2004-0189"
        },
        {
          "category": "external",
          "summary": "RHBZ#1617177",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1617177"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2004-0189",
          "url": "https://www.cve.org/CVERecord?id=CVE-2004-0189"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2004-0189",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2004-0189"
        }
      ],
      "release_date": "2004-02-29T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2004-03-29T07:10:00+00:00",
          "details": "Before applying this update, make sure all previously released errata\nrelevant to your system have been applied.\n\nTo update all RPMs for your particular architecture, run:\n\nrpm -Fvh [filenames]\n\nwhere [filenames] is a list of the RPMs you wish to upgrade.  Only those\nRPMs which are currently installed will be updated.  Those RPMs which are\nnot installed but included in the list will not be updated.  Note that you\ncan also use wildcards (*.rpm) if your current directory *only* contains the\ndesired RPMs.\n\nPlease note that this update is also available via Red Hat Network.  Many\npeople find this an easier way to apply updates.  To use Red Hat Network,\nlaunch the Red Hat Update Agent with the following command:\n\nup2date\n\nThis will start an interactive process that will result in the appropriate\nRPMs being upgraded on your system.\n\nIf up2date fails to connect to Red Hat Network due to SSL\nCertificate Errors, you need to install a version of the\nup2date client with an updated certificate.  The latest version of\nup2date is available from the Red Hat FTP site and may also be\ndownloaded directly from the RHN website:\n\nhttps://rhn.redhat.com/help/latest-up2date.pxt",
          "product_ids": [
            "Red Hat Linux 9"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2004:134"
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Low"
        }
      ],
      "title": "security flaw"
    }
  ]
}


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