rPath Security Advisory: 2009-0007-1
rPath Linux 2
Exposure Level Classification:
Local Root Deterministic Privilege Escalation
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