rhsa-2003:028
Vulnerability from csaf_redhat
Published
2003-03-05 16:07
Modified
2024-11-21 22:35
Summary
Red Hat Security Advisory: pam security update

Notes

Topic
Updated PAM packages are now available. These packages correct a bug in pam_xauth's handling of authorization data for the root user. [Updated 12 March 2003] Added packages for Red Hat Enterprise Linux ES and Red Hat Enterprise Linux WS
Details
The pam_xauth module is used to forward xauth information from user to user in applications such as the su command. Andreas Beck discovered that pam_xauth will forward authorization information from the root account to unprivileged users. This could be used by a local attacker to gain access to an administrator's X session. To exploit this vulnerability the attacker would have to get the administrator, as root, to use su to access the account belonging to the attacker. Users of pam_xauth are advised to upgrade to these errata packages which contain a patch which adds ACL (access control list) functionality to pam_xauth and disallows root forwarding by default. Thanks to Andreas Beck for reporting this issue.
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": "Important"
    },
    "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": "Updated PAM packages are now available.  These packages correct a bug in\npam_xauth\u0027s handling of authorization data for the root user.\n\n[Updated 12 March 2003]\nAdded packages for Red Hat Enterprise Linux ES and Red Hat Enterprise\nLinux WS",
        "title": "Topic"
      },
      {
        "category": "general",
        "text": "The pam_xauth module is used to forward xauth information from user to user\nin applications such as the su command.\n\nAndreas Beck discovered that pam_xauth will forward authorization\ninformation from the root account to unprivileged users.  This could be\nused by a local attacker to gain access to an administrator\u0027s X session. \nTo exploit this vulnerability the attacker would have to get the\nadministrator, as root, to use su to access the account belonging to the\nattacker. \n\nUsers of pam_xauth are advised to upgrade to these errata packages which\ncontain a patch which adds ACL (access control list) functionality to\npam_xauth and disallows root forwarding by default. \n\nThanks to Andreas Beck for reporting this issue.",
        "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-2003:028",
        "url": "https://access.redhat.com/errata/RHSA-2003:028"
      },
      {
        "category": "external",
        "summary": "https://access.redhat.com/security/updates/classification/#important",
        "url": "https://access.redhat.com/security/updates/classification/#important"
      },
      {
        "category": "external",
        "summary": "http://www.redhat.com/support/wpapers/redhat/newpam/tinkering.html",
        "url": "http://www.redhat.com/support/wpapers/redhat/newpam/tinkering.html"
      },
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2003/rhsa-2003_028.json"
      }
    ],
    "title": "Red Hat Security Advisory: pam security update",
    "tracking": {
      "current_release_date": "2024-11-21T22:35:59+00:00",
      "generator": {
        "date": "2024-11-21T22:35:59+00:00",
        "engine": {
          "name": "Red Hat SDEngine",
          "version": "4.2.1"
        }
      },
      "id": "RHSA-2003:028",
      "initial_release_date": "2003-03-05T16:07:00+00:00",
      "revision_history": [
        {
          "date": "2003-03-05T16:07:00+00:00",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2003-01-28T00:00:00+00:00",
          "number": "2",
          "summary": "Last updated version"
        },
        {
          "date": "2024-11-21T22:35:59+00:00",
          "number": "3",
          "summary": "Last generated version"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_name",
                "name": "Red Hat Enterprise Linux AS (Advanced Server) version 2.1 ",
                "product": {
                  "name": "Red Hat Enterprise Linux AS (Advanced Server) version 2.1 ",
                  "product_id": "Red Hat Enterprise Linux AS (Advanced Server) version 2.1 ",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:redhat:enterprise_linux:2.1::as"
                  }
                }
              },
              {
                "category": "product_name",
                "name": "Red Hat Linux Advanced Workstation 2.1",
                "product": {
                  "name": "Red Hat Linux Advanced Workstation 2.1",
                  "product_id": "Red Hat Linux Advanced Workstation 2.1",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:redhat:enterprise_linux:2.1::aw"
                  }
                }
              },
              {
                "category": "product_name",
                "name": "Red Hat Enterprise Linux ES version 2.1",
                "product": {
                  "name": "Red Hat Enterprise Linux ES version 2.1",
                  "product_id": "Red Hat Enterprise Linux ES version 2.1",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:redhat:enterprise_linux:2.1::es"
                  }
                }
              },
              {
                "category": "product_name",
                "name": "Red Hat Enterprise Linux WS version 2.1",
                "product": {
                  "name": "Red Hat Enterprise Linux WS version 2.1",
                  "product_id": "Red Hat Enterprise Linux WS version 2.1",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:redhat:enterprise_linux:2.1::ws"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "Red Hat Enterprise Linux"
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        ],
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  },
  "vulnerabilities": [
    {
      "cve": "CVE-2002-1160",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1616852"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "The default configuration of the pam_xauth module forwards MIT-Magic-Cookies to new X sessions, which could allow local users to gain root privileges by stealing the cookies from a temporary .xauth file, which is created with the original user\u0027s credentials after root uses su.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "security flaw",
          "title": "Vulnerability summary"
        }
      ],
      "product_status": {
        "fixed": [
          "Red Hat Enterprise Linux AS (Advanced Server) version 2.1 ",
          "Red Hat Enterprise Linux ES version 2.1",
          "Red Hat Enterprise Linux WS version 2.1",
          "Red Hat Linux Advanced Workstation 2.1"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2002-1160"
        },
        {
          "category": "external",
          "summary": "RHBZ#1616852",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1616852"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2002-1160",
          "url": "https://www.cve.org/CVERecord?id=CVE-2002-1160"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2002-1160",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2002-1160"
        }
      ],
      "release_date": "2003-02-03T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2003-03-05T16:07:00+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 Red Hat Network.  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.",
          "product_ids": [
            "Red Hat Enterprise Linux AS (Advanced Server) version 2.1 ",
            "Red Hat Enterprise Linux ES version 2.1",
            "Red Hat Enterprise Linux WS version 2.1",
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          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2003:028"
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "security flaw"
    }
  ]
}


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