Ubuntu 11.10: 1335-1 High: t1lib Malformed Font Crash Risk

ubuntu

January 19, 2012

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

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)

Topics Covered

security advisory high severity Ubuntu remote execution crash t1lib font issue

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

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