| Description: | Description:
The remote host is missing an update to xorg-server
announced via advisory USN-571-1.
A security issue affects the following Ubuntu releases:
Ubuntu 6.06 LTS
Ubuntu 6.10
Ubuntu 7.04
Ubuntu 7.10
This advisory also applies to the corresponding versions of
Kubuntu, Edubuntu, and Xubuntu.
Multiple overflows were discovered in the XFree86-Misc, XInput-Misc,
TOG-CUP, EVI, and MIT-SHM extensions which did not correctly validate
function arguments. An authenticated attacker could send specially
crafted requests and gain root privileges. (CVE-2007-5760, CVE-2007-6427,
CVE-2007-6428, CVE-2007-6429)
It was discovered that the X.org server did not use user privileges when
attempting to open security policy files. Local attackers could exploit
this to probe for files in directories they would not normally be able
to access. (CVE-2007-5958)
It was discovered that the PCF font handling code did not correctly
validate the size of fonts. An authenticated attacker could load a
specially crafted font and gain additional privileges. (CVE-2008-0006)
Solution:
The problem can be corrected by upgrading your system to the
following package versions:
Ubuntu 6.06 LTS:
libxfont1 1:1.0.0-0ubuntu3.4
xserver-xorg-core 1:1.0.2-0ubuntu10.8
Ubuntu 6.10:
libxfont1 1:1.2.0-0ubuntu3.2
xserver-xorg-core 1:1.1.1-0ubuntu12.3
Ubuntu 7.04:
libxfont1 1:1.2.7-1ubuntu1.1
xserver-xorg-core 2:1.2.0-3ubuntu8.1
Ubuntu 7.10:
libxfont1 1:1.3.0-0ubuntu1.1
xserver-xorg-core 2:1.3.0.0.dfsg-12ubuntu8.1
After a standard system upgrade you need to restart your session to effect
the necessary changes.
http://www.securityspace.com/smysecure/catid.html?in=USN-571-1
Risk factor : Critical
CVSS Score:
9.3
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