rhsa-2003:035
Vulnerability from csaf_redhat
Published
2003-02-13 08:34
Modified
2024-11-21 22:36
Summary
Red Hat Security Advisory: : : : Updated PAM packages fix bug in pam_xauth module

Notes

Topic
Updated PAM packages are now available for Red Hat Linux 7.1, 7.2, 7.3, and 8.0. These packages correct a bug in pam_xauth's handling of authorization data for the root user. [Updated 16 April 2003] Added packages for Red Hat Linux on IBM iSeries and pSeries systems.
Details
The pam_xauth module is used to forward xauth information from user to user in applications such as 'su'. Andreas Beck discovered that versions of pam_xauth supplied with Red Hat Linux since version 7.1 would 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. In order to exploit this vulnerability, the attacker would have to get the administrator, as root, to use su to the account belonging to the attacker. Users of pam_xauth are advised to upgrade to these errata packages, which contain a patch that adds ACL (access control list) functionality to pam_xauth and disallows root forwarding by default. Versions of pam_xauth included in Red Hat Linux 7 and earlier disabled passing of credentials from the root account to unprivileged users by default and are not affected by this issue. 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 for Red Hat Linux 7.1, 7.2, 7.3, and\n8.0.  These packages correct a bug in pam_xauth\u0027s handling of authorization\ndata for the root user.\n\n[Updated 16 April 2003]\nAdded packages for Red Hat Linux on IBM iSeries and pSeries systems.",
        "title": "Topic"
      },
      {
        "category": "general",
        "text": "The pam_xauth module is used to forward xauth information from user to user\nin applications such as \u0027su\u0027.\n\nAndreas Beck discovered that versions of pam_xauth supplied with Red Hat\nLinux since version 7.1 would forward authorization information from the\nroot account to unprivileged users. This could be used by a local attacker\nto gain access to an administrator\u0027s X session. In order to exploit this\nvulnerability, the attacker would have to get the administrator, as root,\nto use su to the account belonging to the attacker.\n\nUsers of pam_xauth are advised to upgrade to these errata packages, which\ncontain a patch that adds ACL (access control list) functionality to\npam_xauth and disallows root forwarding by default.\n\nVersions of pam_xauth included in Red Hat Linux 7 and earlier disabled\npassing of credentials from the root account to unprivileged users by\ndefault and are not affected by this issue.\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-2003:035",
        "url": "https://access.redhat.com/errata/RHSA-2003:035"
      },
      {
        "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_035.json"
      }
    ],
    "title": "Red Hat Security Advisory: : : : Updated PAM packages fix bug in pam_xauth module",
    "tracking": {
      "current_release_date": "2024-11-21T22:36:02+00:00",
      "generator": {
        "date": "2024-11-21T22:36:02+00:00",
        "engine": {
          "name": "Red Hat SDEngine",
          "version": "4.2.1"
        }
      },
      "id": "RHSA-2003:035",
      "initial_release_date": "2003-02-13T08:34:00+00:00",
      "revision_history": [
        {
          "date": "2003-02-13T08:34:00+00:00",
          "number": "1",
          "summary": "Initial version"
        },
        {
          "date": "2003-02-07T00:00:00+00:00",
          "number": "2",
          "summary": "Last updated version"
        },
        {
          "date": "2024-11-21T22:36:02+00:00",
          "number": "3",
          "summary": "Last generated version"
        }
      ],
      "status": "final",
      "version": "3"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_name",
                "name": "Red Hat Linux 7.1",
                "product": {
                  "name": "Red Hat Linux 7.1",
                  "product_id": "Red Hat Linux 7.1",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:redhat:linux:7.1"
                  }
                }
              },
              {
                "category": "product_name",
                "name": "Red Hat Linux 7.2",
                "product": {
                  "name": "Red Hat Linux 7.2",
                  "product_id": "Red Hat Linux 7.2",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:redhat:linux:7.2"
                  }
                }
              },
              {
                "category": "product_name",
                "name": "Red Hat Linux 7.3",
                "product": {
                  "name": "Red Hat Linux 7.3",
                  "product_id": "Red Hat Linux 7.3",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:redhat:linux:7.3"
                  }
                }
              },
              {
                "category": "product_name",
                "name": "Red Hat Linux 8.0",
                "product": {
                  "name": "Red Hat Linux 8.0",
                  "product_id": "Red Hat Linux 8.0",
                  "product_identification_helper": {
                    "cpe": "cpe:/o:redhat:linux:8.0"
                  }
                }
              }
            ],
            "category": "product_family",
            "name": "Red Hat Linux"
          }
        ],
        "category": "vendor",
        "name": "Red Hat"
      }
    ]
  },
  "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 Linux 7.1",
          "Red Hat Linux 7.2",
          "Red Hat Linux 7.3",
          "Red Hat Linux 8.0"
        ]
      },
      "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": "2003-02-13T08:34:00+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.",
          "product_ids": [
            "Red Hat Linux 7.1",
            "Red Hat Linux 7.2",
            "Red Hat Linux 7.3",
            "Red Hat Linux 8.0"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2003:035"
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "security flaw"
    }
  ]
}


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