rhsa-2011_0199
Vulnerability from csaf_redhat
Published
2011-02-08 21:39
Modified
2024-11-22 04:06
Summary
Red Hat Security Advisory: krb5 security update

Notes

Topic
Updated krb5 packages that fix two security issues are now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having important security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section.
Details
Kerberos is a network authentication system which allows clients and servers to authenticate to each other using symmetric encryption and a trusted third-party, the Key Distribution Center (KDC). A NULL pointer dereference flaw was found in the way the MIT Kerberos KDC processed principal names that were not null terminated, when the KDC was configured to use an LDAP back end. A remote attacker could use this flaw to crash the KDC via a specially-crafted request. (CVE-2011-0282) A denial of service flaw was found in the way the MIT Kerberos KDC processed certain principal names when the KDC was configured to use an LDAP back end. A remote attacker could use this flaw to cause the KDC to hang via a specially-crafted request. (CVE-2011-0281) Red Hat would like to thank the MIT Kerberos Team for reporting these issues. Upstream acknowledges Kevin Longfellow of Oracle Corporation as the original reporter of the CVE-2011-0281 issue. All krb5 users should upgrade to these updated packages, which contain a backported patch to correct these issues. After installing the updated packages, the krb5kdc daemon 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.


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        "text": "Updated krb5 packages that fix two security issues are now available for\nRed Hat Enterprise Linux 5.\n\nThe Red Hat Security Response Team has rated this update as having\nimportant security impact. Common Vulnerability Scoring System (CVSS) base\nscores, which give detailed severity ratings, are available for each\nvulnerability from the CVE links in the References section.",
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        "text": "Kerberos is a network authentication system which allows clients and\nservers to authenticate to each other using symmetric encryption and a\ntrusted third-party, the Key Distribution Center (KDC).\n\nA NULL pointer dereference flaw was found in the way the MIT Kerberos KDC\nprocessed principal names that were not null terminated, when the KDC was\nconfigured to use an LDAP back end. A remote attacker could use this flaw\nto crash the KDC via a specially-crafted request. (CVE-2011-0282)\n\nA denial of service flaw was found in the way the MIT Kerberos KDC\nprocessed certain principal names when the KDC was configured to use an\nLDAP back end. A remote attacker could use this flaw to cause the KDC to\nhang via a specially-crafted request. (CVE-2011-0281)\n\nRed Hat would like to thank the MIT Kerberos Team for reporting these\nissues. Upstream acknowledges Kevin Longfellow of Oracle Corporation as the\noriginal reporter of the CVE-2011-0281 issue.\n\nAll krb5 users should upgrade to these updated packages, which contain a\nbackported patch to correct these issues. After installing the updated\npackages, the krb5kdc daemon will be restarted automatically.",
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      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2011-0282"
        },
        {
          "category": "external",
          "summary": "RHBZ#668726",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=668726"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2011-0282",
          "url": "https://www.cve.org/CVERecord?id=CVE-2011-0282"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2011-0282",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2011-0282"
        }
      ],
      "release_date": "2011-02-08T00:00:00+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2011-02-08T21:39:00+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\nhttp://kbase.redhat.com/faq/docs/DOC-11259",
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            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 5.0,
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
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        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "krb5: KDC crash when using LDAP backend caused by a special principal name (MITKRB5-SA-2011-002)"
    }
  ]
}


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