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bugtraq: [ GLSA 200806-04 ] rdesktop: Multiple vulnerabilities

[ GLSA 200806-04 ] rdesktop: Multiple vulnerabilities

From: Pierre-Yves Rofes <py_at_nospam>
Date: Sat Jun 14 2008 - 19:15:17 GMT
To: gentoo-announce@gentoo.org


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  • - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200806-04
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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@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.

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