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LibXfont: Multiple integer overflows

Content:

1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200609-04 / LibXfont
Release Date September 06, 2006
Latest Revision September 06, 2006: 01
Impact normal
Exploitable local
Package Vulnerable versions Unaffected versions Architecture(s)
x11-libs/libXfont < 1.2.0-r1 >= 1.2.0-r1 All supported architectures

Related bugreports: #144092

Synopsis

A buffer overflow was discovered in the PCF font parser, potentially resulting in the execution of arbitrary code.

2.  Impact Information

Background

libXfont is the X.Org Xfont library, some parts are based on the FreeType code base.

Description

Several integer overflows have been found in the PCF font parser.

Impact

A local attacker could possibly execute arbitrary code or crash the Xserver by enticing a user to load a specially crafted PCF font file.

3.  Resolution Information

Workaround

Do not use untrusted PCF Font files.

Resolution

All libXfont users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=x11-libs/libXfont-1.2.0-r1"

4.  References



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Page updated September 06, 2006

Summary: This is a Gentoo Linux Security Advisory

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