t1lib vulnerabilities

19 January 2012

t1lib vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

• Ubuntu 11.10
• Ubuntu 11.04
• Ubuntu 10.10
• Ubuntu 10.04 LTS

Summary

t1lib could be made to crash or run programs as your login if it opened a specially crafted font file.

Software Description

• t1lib - Type 1 font rasterizer library - runtime

Details

Jon Larimer discovered that t1lib did not properly parse AFM fonts. If a user were tricked into using a specially crafted font file, a remote attacker could cause t1lib to crash or possibly execute arbitrary code with user privileges. (CVE-2010-2642, CVE-2011-0433)

Jonathan Brossard discovered that t1lib did not correctly handle certain malformed font files. If a user were tricked into using a specially crafted font file, a remote attacker could cause t1lib to crash. (CVE-2011-1552, CVE-2011-1553, CVE-2011-1554)

Update instructions

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

Ubuntu 11.10

libt1-5 - 5.1.2-3ubuntu0.11.10.2

Ubuntu 11.04

libt1-5 - 5.1.2-3ubuntu0.11.04.2

Ubuntu 10.10

libt1-5 - 5.1.2-3ubuntu0.10.10.2

Ubuntu 10.04 LTS

libt1-5 - 5.1.2-3ubuntu0.10.04.2

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

In general, a standard system update will make all the necessary changes.

References

• CVE-2010-2642
• CVE-2011-0433
• CVE-2011-1552
• CVE-2011-1553
• CVE-2011-1554