Advisories:rPSA-2009-0007

From rPath Wiki

rPath Security Advisory 2009-0007-1

Published: 2009-01-13

Products

• rPath Linux 2

Rating

Severe

Exposure Level Classification

Local Root Deterministic Privilege Escalation

Updated Versions

• pam_krb5=conary.rpath.com@rpl:2/2.2.11-4.1-1
• pam_krb5=rap-emc.rpath.com@rpath:emc-production-2/2.2.11-4-1
• pam_krb5=rap-emc.rpath.com@rpath:emc-production-2/2.2.11-4-2

rPath Issue Tracking System

• RPL-2929

References

• {{{1}}}

Description

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