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rPath Security Advisory: 2009-0007-1
rPath Linux 2
Exposure Level Classification:
Local Root Deterministic Privilege Escalation Updated Versions:
rPath Issue Tracking System:
When the existing_ticket option is enabled, previous versions of the pam_krb5 package use incorrect privileges when reading a Kerberos credential cache, which allows other local users to gain privileges by setting the KRB5CCNAME environment variable to an arbitrary cache filename and running the su or sudo program. It may be possible to mount a similar attack using sshd if sshd is configured insecurely, but such a configuration will be otherwise vulnerable and so this is not considered relevant.
rPath Linux does not ship with the existing_ticket option enabled by default, and therefore is by default not vulnerable to this attack.
Copyright 2009 rPath, Inc.
This file is distributed under the terms of the MIT License. A copy is available at http://www.rpath.com/permanent/mit-license.html