7.6 - USN-1082-1

A security issue affects the following Ubuntu releases:

Ubuntu 8.04 LTS Ubuntu 9.10 Ubuntu 10.04 LTS Ubuntu 10.10

This advisory also applies to the corresponding versions of Kubuntu, Edubuntu, and Xubuntu.

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

Ubuntu 8.04 LTS:
libpango1.0-0 1.20.5-0ubuntu1.2

Ubuntu 9.10:
libpango1.0-0 1.26.0-1ubuntu0.1

Ubuntu 10.04 LTS:
gir1.0-pango-1.0 1.28.0-0ubuntu2.2

Ubuntu 10.10:
gir1.0-pango-1.0 1.28.2-0ubuntu1.1

After a standard system update you need to restart your session to make all the necessary changes.

Details follow:

Marc Schoenefeld discovered that Pango incorrectly handled certain Glyph Definition (GDEF) tables. If a user were tricked into displaying text with a specially-crafted font, an attacker could cause Pango to crash, resulting in a denial of service. This issue only affected Ubuntu 8.04 LTS and 9.10. (CVE-2010-0421)

Dan Rosenberg discovered that Pango incorrectly handled certain FT_Bitmap objects. If a user were tricked into displaying text with a specially- crafted font, an attacker could cause a denial of service or execute arbitrary code with privileges of the user invoking the program. The default compiler options for affected releases should reduce the vulnerability to a denial of service. (CVE-2011-0020)

It was discovered that Pango incorrectly handled certain memory reallocation failures. If a user were tricked into displaying text in a way that would cause a reallocation failure, an attacker could cause a denial of service or execute arbitrary code with privileges of the user invoking the program. This issue only affected Ubuntu 9.10, 10.04 LTS and 10.10. (CVE-2011-0064)