Full Disclosure: [ GLSA 200903-17 ] Real VNC: User-assisted execution of arbitrary code

[Robert Buchholz <rbu () gentoo org>]

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Gentoo Linux Security Advisory                           GLSA 200903-17
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                                            http://security.gentoo.org/
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  Severity: Normal
     Title: Real VNC: User-assisted execution of arbitrary code
      Date: March 09, 2009
      Bugs: #255225
        ID: 200903-17

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Synopsis
========

The Real VNC client is vulnerable to execution of arbitrary code when
connecting to a malicious server.

Background
==========

Real VNC is a remote desktop viewer display system.

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

    -------------------------------------------------------------------
     Package       /  Vulnerable  /                         Unaffected
    -------------------------------------------------------------------
  1  net-misc/vnc       < 4.1.3                               >= 4.1.3

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

An unspecified vulnerability has been discovered int the
CMsgReader::readRect() function in the VNC Viewer component, related to
the encoding type of RFB protocol data.

Impact
======

A remote attacker could entice a user to connect to a malicious VNC
server, or leverage Man-in-the-Middle attacks, to cause the execution
of arbitrary code with the privileges of the user running the VNC
viewer.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Real VNC users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-misc/vnc-4.1.3"

References
==========

  [ 1 ] CVE-2008-4770
        http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4770

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

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

  http://security.gentoo.org/glsa/glsa-200903-17.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 2009 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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