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Test ID:
Category:Red Hat Local Security Checks
Title:RedHat Update for gdm RHSA-2011:0395-01
Summary:The remote host is missing an update for the 'gdm'; package(s) announced via the referenced advisory.
The remote host is missing an update for the 'gdm'
package(s) announced via the referenced advisory.

Vulnerability Insight:
The GNOME Display Manager (GDM) provides the graphical login screen, shown
shortly after boot up, log out, and when user-switching.

A race condition flaw was found in the way GDM handled the cache
directories used to store users' dmrc and face icon files. A local attacker
could use this flaw to trick GDM into changing the ownership of an
arbitrary file via a symbolic link attack, allowing them to escalate their
privileges. (CVE-2011-0727)

Red Hat would like to thank Sebastian Krahmer of the SuSE Security Team for
reporting this issue.

All users should upgrade to these updated packages, which contain a
backported patch to correct this issue. GDM must be restarted for this
update to take effect. Rebooting achieves this, but changing the runlevel
from 5 to 3 and back to 5 also restarts GDM.

Affected Software/OS:
gdm on Red Hat Enterprise Linux Desktop (v. 6),
Red Hat Enterprise Linux Server (v. 6),
Red Hat Enterprise Linux Workstation (v. 6)

Please Install the Updated Packages.

CVSS Score:

CVSS Vector:

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2011-0727
BugTraq ID: 47063
Debian Security Information: DSA-2205 (Google Search)
XForce ISS Database: display-manager-priv-escalation(66377)
CopyrightCopyright (c) 2012 Greenbone Networks GmbH

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