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rdesktop: Multiple vulnerabilities

Content:

1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200806-04 / rdesktop
Release Date June 14, 2008
Latest Revision June 14, 2008: 01
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
net-misc/rdesktop < 1.6.0 >= 1.6.0 All supported architectures

Related bugreports: #220911

Synopsis

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

2.  Impact Information

Background

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

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.

3.  Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All rdesktop users should upgrade to the latest version:

Code Listing 3.1: Resolution

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

4.  References



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Page updated June 14, 2008

Summary: This is a Gentoo Linux Security Advisory

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