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Sicherheit: Mehrere Probleme in LibXfont, TightVNC
Aktuelle Meldungen Distributionen
Name: Mehrere Probleme in LibXfont, TightVNC
ID: 200705-10
Distribution: Gentoo
Plattformen: Keine Angabe
Datum: Di, 8. Mai 2007, 18:39
Referenzen: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1003
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1351
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1352
Applikationen: TightVnc, X11

Originalnachricht


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Gentoo Linux Security Advisory GLSA 200705-10
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http://security.gentoo.org/
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Severity: High
Title: LibXfont, TightVNC: Multiple vulnerabilities
Date: May 08, 2007
Bugs: #172575, #174200
ID: 200705-10

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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 < 1.2.9-r4 >= 1.2.9-r4
2 x11-libs/libXfont < 1.2.7-r1 >= 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
">=x11-libs/libXfont-1.2.7-r1"

All TightVNC users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose
">=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

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