GLSA 200806-04 rdesktop: Multiple vulnerabilities
Posted on: 06/14/2008 08:20 PM

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

Gentoo Linux Security Advisory GLSA 200806-04
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http://security.gentoo.org/
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Severity: Normal
Title: rdesktop: Multiple vulnerabilities
Date: June 14, 2008
Bugs: #220911
ID: 200806-04

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Synopsis
========

Multiple vulnerabilities in rdesktop may lead to the execution of
arbitrary code or a Denial of Service.

Background
==========

rdesktop is an open source Remote Desktop Protocol (RDP) client.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-misc/rdesktop lt; 1.6.0 gt;= 1.6.0

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

An anonymous researcher reported multiple vulnerabilities in rdesktop
via iDefense Labs:

* An integer underflow error exists in the function iso_recv_msg() in
the file iso.c which can be triggered via a specially crafted RDP
request, causing a heap-based buffer overflow (CVE-2008-1801).

* An input validation error exists in the function
process_redirect_pdu() in the file rdp.c which can be triggered via a
specially crafted RDP redirect request, causing a BSS-based buffer
overflow (CVE-2008-1802).

* An integer signedness error exists in the function xrealloc() in
the file rdesktop.c which can be be exploited to cause a heap-based
buffer overflow (CVE-2008-1803).

Impact
======

An attacker could exploit these vulnerabilities by enticing a user to
connect to a malicious RDP server thereby allowing the attacker to
execute arbitrary code or cause a Denial of Service.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All rdesktop users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose "gt;=net-misc/rdesktop-1.6.0"

References
==========

[ 1 ] CVE-2008-1801
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1801
[ 2 ] CVE-2008-1802
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1802
[ 3 ] CVE-2008-1803
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1803

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

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

http://security.gentoo.org/glsa/glsa-200806-04.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 2008 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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