GLSA 200705-10 LibXfont, TightVNC: Multiple vulnerabilities
Posted on: 05/08/2007 07:55 PM

A new security update has been released for Gentoo Linux - LibXfont, TightVNC: Multiple vulnerabilities. Here the announcement:

Gentoo Linux Security Advisory GLSA 200705-10
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Severity: High
Title: LibXfont, TightVNC: Multiple vulnerabilities
Date: May 08, 2007
Bugs: #172575, #174200
ID: 200705-10

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Synopsis
========

Multiple vulnerabilities have been reported in libXfont and TightVNC,
allowing for the execution of arbitrary code with root privileges.

Background
==========

LibXfont is the X.Org font library. TightVNC is a VNC client/server for
X displays.

Affected packages
=================

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-misc/tightvnc lt; 1.2.9-r4 gt;= 1.2.9-r4
2 x11-libs/libXfont lt; 1.2.7-r1 gt;= 1.2.7-r1
-------------------------------------------------------------------
2 affected packages on all of their supported architectures.
-------------------------------------------------------------------

Description
===========

The libXfont code is prone to several integer overflows, in functions
ProcXCMiscGetXIDList(), bdfReadCharacters() and FontFileInitTable().
TightVNC contains a local copy of this code and is also affected.

Impact
======

A local attacker could use a specially crafted BDF Font to gain root
privileges on the vulnerable host.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All libXfont users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose "gt;=x11-libs/libXfont-1.2.7-r1"

All TightVNC users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose "gt;=net-misc/tightvnc-1.2.9-r4"

References
==========

[ 1 ] CVE-2007-1003
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1003
[ 2 ] CVE-2007-1351
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1351
[ 3 ] CVE-2007-1352
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1352

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200705-10.xml

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.

License
=======

Copyright 2007 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.5



Printed from Linux Compatible (http://www.linuxcompatible.org/news/story/glsa_200705_10_libxfonttightvnc_multiple_vulnerabilities.html)