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[ GLSA 200609-04 ] LibXfont: Multiple integer overflows
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PostPosted: Wed Sep 06, 2006 6:26 pm    Post subject: [ GLSA 200609-04 ] LibXfont: Multiple integer overflows Reply with quote

Gentoo Linux Security Advisory

Title: LibXfont: Multiple integer overflows (GLSA 200609-04)
Severity: normal
Exploitable: local
Date: September 06, 2006
Bug(s): #144092
ID: 200609-04

Synopsis

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

Background

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

Affected Packages

Package: x11-libs/libXfont
Vulnerable: < 1.2.0-r1
Unaffected: >= 1.2.0-r1
Architectures: All supported architectures


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.

Workaround

Do not use untrusted PCF Font files.

Resolution

All libXfont users should upgrade to the latest version:
Code:
# emerge --sync
# emerge --ask --oneshot --verbose ">=x11-libs/libXfont-1.2.0-r1"


References

CVE-2006-3467
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