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Gentoo Linux Security Advisory                           GLSA 201702-19
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: TigerVNC: Buffer overflow
     Date: February 20, 2017
     Bugs: #606998
       ID: 201702-19

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Synopsis
=======
A buffer overflow in TigerVNC might allow remote attackers to execute
arbitrary code.

Background
=========
TigerVNC is a high-performance VNC server/client.

Affected packages
================
    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  net-misc/tigervnc            < 1.7.1                    >= 1.7.1

Description
==========
A buffer overflow vulnerability in ModifiablePixelBuffer::fillRect in
vncviewer was found.

Impact
=====
A remote attacker, utilizing a malicious VNC server, could execute
arbitrary code with the privileges of the user running the client or
cause a Denial of Service condition.

Workaround
=========
There is no known workaround at this time.

Resolution
=========
All TigerVNC users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=net-misc/tigervnc-1.7.1"

References
=========
[ 1 ] CVE-2017-5581
      http://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-5581

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

 https://security.gentoo.org/glsa/201702-19

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.

License
======
Copyright 2017 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.

https://creativecommons.org/licenses/by-sa/2.5/