MIT Kerberos KDC remote realm user spoofing

kerberos-kdc-user-spoofing (11188) The risk level is classified as MediumMedium Risk


The MIT Kerberos Key Distribution Center (KDC) could allow a user in a remote realm to spoof another legitimate user, if the two realms have a shared key. A remote attacker could use this vulnerability to perform malicious actions and launch further attacks against the affected system.


Bypass Security


Upgrade to the latest version of MIT Kerberos 5 (krb5-1.2.7 or later), available from the MIT Kerberos Web site. See References.

For Red Hat Linux:
Upgrade to the latest krb5 package, as listed below. Refer to RHSA-2003:051-30 for more information. See References.

Red Hat 6.2: 1.1.1-40 or later
Red Hat 7.0, 7.1, and 7.2: 1.2.2-24 or later
Red Hat 7.3: 1.2.4-11 or later
Red Hat 8.0: 1.2.5-15 or later

For Conectiva Linux 8.0:
Upgrade to the latest version of krb5 (1.2.8-1U80_1cl or later), as listed in Conectiva Linux Security Announcement CLSA-2003:639. See References.

For other distributions:
Contact your vendor for upgrade or patch information.


Platforms Affected:

  • Conectiva Linux 8.0
  • MandrakeSoft Mandrake Linux 8.2
  • MandrakeSoft Mandrake Linux 8.2 PPC
  • MandrakeSoft Mandrake Linux 9.0
  • MandrakeSoft Mandrake Linux 9.1
  • MandrakeSoft Mandrake Linux 9.1 PPC
  • MandrakeSoft Mandrake Linux Corporate Server 2.1
  • MandrakeSoft Mandrake Linux Corporate Server 2.1 X86_64
  • MandrakeSoft Mandrake Multi Network Firewall 8.2
  • MIT Kerberos 5-1.2.1
  • MIT Kerberos 5-1.2.2
  • RedHat Enterprise Linux 2.1 AS
  • RedHat Enterprise Linux 2.1 ES
  • RedHat Enterprise Linux 2.1 WS
  • RedHat Linux 6.2
  • RedHat Linux 7
  • RedHat Linux 7.1
  • RedHat Linux 7.1 for iSeries
  • RedHat Linux 7.1 for pSeries
  • RedHat Linux 7.2
  • RedHat Linux 7.3
  • RedHat Linux 8.0
  • RedHat Linux Advanced Workstation 2.1 Itanium


Jan 28, 2003

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