rPSA-2009-0007-1 pam_krb5

From: rPath Update Announcements <announce-noreply@rpath.com>
To: security-announce@lists.rpath.com,update-announce@lists.rpath.com
Cc: full-disclosure@lists.grok.org.uk,vulnwatch@vulnwatch.org,bugtraq@securityfocus.com,lwn@lwn.net
Subject: rPSA-2009-0007-1 pam_krb5

rPath Security Advisory: 2009-0007-1
Published: 2009-01-13
    rPath Linux 2

Rating: Severe
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

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