LibXfont: Multiple integer overflows

1. Gentoo Linux Security Advisory

Package	Vulnerable versions	Unaffected versions	Architecture(s)
x11-libs/libXfont	< 1.2.0-r1	>= 1.2.0-r1	All supported architectures

Related bugreports: #144092

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

2. Impact Information

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

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

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

Do not use untrusted PCF Font files.

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

Page updated September 06, 2006

Summary: This is a Gentoo Linux Security Advisory

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