[gentoo-announce] [ GLSA 200806-04 ] rdesktop: Multiple vulnerabilities

[news 28]

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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 < 1.6.0 >= 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 ">=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 ( -at -) 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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