rhsa-2008_0907
Vulnerability from csaf_redhat
Published
2008-10-02 13:59
Modified
2024-11-22 02:17
Summary
Red Hat Security Advisory: pam_krb5 security update

Notes

Topic
An updated pam_krb5 package that fixes a security issue is now available for Red Hat Enterprise Linux 5. This update has been rated as having moderate security impact by the Red Hat Security Response Team.
Details
The pam_krb5 module allows Pluggable Authentication Modules (PAM) aware applications to use Kerberos to verify user identities by obtaining user credentials at log in time. A flaw was found in the pam_krb5 "existing_ticket" configuration option. If a system is configured to use an existing credential cache via the "existing_ticket" option, it may be possible for a local user to gain elevated privileges by using a different, local user's credential cache. (CVE-2008-3825) Red Hat would like to thank Stéphane Bertin for responsibly disclosing this issue. Users of pam_krb5 should upgrade to this updated package, which contains a backported patch to resolve 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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        "text": "An updated pam_krb5 package that fixes a security issue is now available\nfor Red Hat Enterprise Linux 5.\n\nThis update has been rated as having moderate security impact by the Red\nHat Security Response Team.",
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        "text": "The pam_krb5 module allows Pluggable Authentication Modules (PAM) aware\napplications to use Kerberos to verify user identities by obtaining user\ncredentials at log in time.\n\nA flaw was found in the pam_krb5 \"existing_ticket\" configuration option. If\na system is configured to use an existing credential cache via the\n\"existing_ticket\" option, it may be possible for a local user to gain\nelevated privileges by using a different, local user\u0027s credential cache.\n(CVE-2008-3825)\n\nRed Hat would like to thank St\u00e9phane Bertin for responsibly disclosing this\nissue.\n\nUsers of pam_krb5 should upgrade to this updated package, which contains a\nbackported patch to resolve this issue.",
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  },
  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "St\u00e9phane Bertin"
          ]
        }
      ],
      "cve": "CVE-2008-3825",
      "discovery_date": "2008-07-31T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "461960"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "pam_krb5 2.2.14 in Red Hat Enterprise Linux (RHEL) 5 and earlier, when the existing_ticket option is enabled, uses incorrect privileges when reading a Kerberos credential cache, which allows local users to gain privileges by setting the KRB5CCNAME environment variable to an arbitrary cache filename and running the (1) su or (2) sudo program. NOTE: there may be a related vector involving sshd that has limited relevance.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "pam_krb5 existing_ticket permission flaw",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This issue did not affect the version of pam_krb5 shipped in Red Hat Enterprise Linux 2.1, 3, or 4.",
          "title": "Statement"
        }
      ],
      "product_status": {
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        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2008-3825"
        },
        {
          "category": "external",
          "summary": "RHBZ#461960",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=461960"
        },
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          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2008-3825",
          "url": "https://www.cve.org/CVERecord?id=CVE-2008-3825"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2008-3825",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2008-3825"
        }
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      "release_date": "2008-10-01T00:00:00+00:00",
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          "date": "2008-10-02T13:59:00+00:00",
          "details": "Before applying this update, make sure that all previously-released\nerrata relevant to your system have been applied.\n\nThis update is available via Red Hat Network.  Details on how to use\nthe Red Hat Network to apply this update are available at\nhttp://kbase.redhat.com/faq/FAQ_58_10188",
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          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2008:0907"
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "pam_krb5 existing_ticket permission flaw"
    }
  ]
}


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