GLSA 200806-04: rdesktop: Multiple vulnerabilities

http://security.gentoo.org/

Severity:	normal
Title:	rdesktop: Multiple vulnerabilities
Date:	06/14/2008
Bugs:	#220911
ID:	200806-04

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	Architecture(s)
net-misc/rdesktop	< 1.6.0	>= 1.6.0	All supported architectures

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

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 https://bugs.gentoo.org.