MIT Kerberos KDC logging routine format string

kerberos-kdc-format-string (11189) The risk level is classified as HighHigh Risk


The MIT Kerberos Key Distribution Center (KDC) is vulnerable to a format string attack, caused by a vulnerability in the KDC logging routines. A remote attacker could exploit this vulnerability by passing malicious format strings to the affected server to cause the KDC to crash or possibly execute arbitrary commands on the system.


Gain Access


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 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
  • MIT Kerberos 5-1.2.1
  • MIT Kerberos 5-1.2.2
  • MIT Kerberos 5-1.2.3
  • MIT Kerberos 5-1.2.4


Jan 28, 2003

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