Ubuntu 11.10 : lightdm vulnerabilities (USN-1262-1)

Ubuntu Security Notice (C) 2011-2014 Canonical, Inc. / NASL script (C) 2011-2014 Tenable Network Security, Inc.


Synopsis :

The remote Ubuntu host is missing one or more security-related patches.

Description :

It was discovered that Light Display Manager incorrectly handled
privileges when reading .dmrc files. A local attacker could exploit
this issue to read arbitrary configuration files, bypassing intended
permissions. (CVE-2011-3153)

It was discovered that Light Display Manager incorrectly handled links
when adjusting permissions on .Xauthority files. A local attacker
could exploit this issue to access arbitrary files, and possibly
obtain increased privileges. In the default Ubuntu installation, this
would be prevented by the Yama link restrictions. (CVE-2011-4105).

Solution :

Update the affected liblightdm-gobject-1-0, liblightdm-qt-1-0 and / or
lightdm packages.

Risk factor :

Low / CVSS Base Score : 1.9
(CVSS2#AV:L/AC:M/Au:N/C:P/I:N/A:N)
CVSS Temporal Score : 1.6
(CVSS2#E:F/RL:OF/RC:C)
Public Exploit Available : true

Family: Ubuntu Local Security Checks

Nessus Plugin ID: 56854 ()

Bugtraq ID: 50511
50685
50688

CVE ID: CVE-2011-3153
CVE-2011-4105