USN-448-1: X.org vulnerabilities

Releases

• Ubuntu 6.10
• Ubuntu 6.06
• Ubuntu 5.10

Details

Sean Larsson of iDefense Labs discovered that the MISC-XC extension of
Xorg did not correctly verify the size of allocated memory. An
authenticated user could send a specially crafted X11 request and
execute arbitrary code with root privileges. (CVE-2007-1003)

Greg MacManus of iDefense Labs discovered that the BDF font handling
code in Xorg and FreeType did not correctly verify the size of allocated
memory. If a user were tricked into using a specially crafted font, a
remote attacker could execute arbitrary code with root privileges.
(CVE-2007-1351, CVE-2007-1352)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 6.10

• libxfont1 - 1:1.2.0-0ubuntu3.1
• xserver-xorg-core - 1:1.1.1-0ubuntu12.2
• libfreetype6 - 2.2.1-5ubuntu0.1

Ubuntu 6.06

• libxfont1 - 1:1.0.0-0ubuntu3.3
• xserver-xorg-core - 1:1.0.2-0ubuntu10.6
• libfreetype6 - 2.1.10-1ubuntu2.3

Ubuntu 5.10

• libxfont1 - 1:0.99.0+cvs.20050909-1.3
• xserver-xorg-core - 6.8.2-77.3
• libfreetype6 - 2.1.7-2.4ubuntu1.3

After a standard system upgrade you need to reboot your computer to
effect the necessary changes.

References

• CVE-2007-1351
• CVE-2007-1003
• CVE-2007-1352