Vulnerability CVE-2013-4169
Published: 2013-09-10

Description:
GNOME Display Manager (gdm) before 2.21.1 allows local users to change permissions of arbitrary directories via a symlink attack on /tmp/.X11-unix/.

See advisories in our WLB2 database:
Topic
Author
Date
Med.
GDM TOCTTOU race condition on /tmp/.X11-unix
Vincent Danen
06.09.2013

Type:

CWE-59

 (Improper Link Resolution Before File Access ('Link Following'))

CVSS2 => (AV:L/AC:M/Au:N/C:C/I:C/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
6.9/10
10/10
3.4/10
Exploit range
Attack complexity
Authentication
Local
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Complete
Complete
Complete
Affected software
Redhat -> Enterprise linux 
Redhat -> Enterprise linux desktop 
Gnome -> Gnome display manager 

 References:
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=988498
http://secunia.com/advisories/54661
http://rhn.redhat.com/errata/RHSA-2013-1213.html
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