Sicherheit: Zwei Probleme in TigerVNC

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From: Aaron Bauman <bman@gentoo.org>
To: gentoo-announce@lists.gentoo.org
Message-ID: <be49e2ce-b6f5-4612-a050-50a2eb524bf6@gentoo.org>
Subject: [ GLSA 201612-36 ] TigerVNC: Integer overflow

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Gentoo Linux Security Advisory GLSA 201612-36
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https://security.gentoo.org/
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Severity: Normal
Title: TigerVNC: Integer overflow
Date: December 13, 2016
Bugs: #534714
ID: 201612-36

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Synopsis
========

An integer 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 < 1.4.2 >= 1.4.2

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

TigerVNC is impacted by the same vulnerability as found in
CVE-2014-6051. An integer overflow, leading to a heap-based buffer
overflow, was found in the way screen sizes were handled.

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-1.4.2"

References
==========

[ 1 ] CVE-2014-6051
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-6051
[ 2 ] CVE-2014-8240
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2014-8240

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

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

https://security.gentoo.org/glsa/201612-36

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 2016 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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Gentoo Linux Security Advisory GLSA 201612-36
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<a
class=3D"moz-txt-link-freet=
ext" href=3D"https://security.gentoo.org/">https://security.gentoo.org/</=
a>
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Severity: Normal
Title: TigerVNC: Integer overflow
Date: December 13, 2016
Bugs: #534714
ID: 201612-36

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Synopsis
=3D=3D=3D=3D=3D=3D=3D=3D

An integer overflow in TigerVNC might allow remote attackers to execute
arbitrary code.

Background
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

TigerVNC is a high-performance VNC server/client.

Affected packages
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-misc/tigervnc < 1.4.2 >=3D
1=
=2E4.2=20

Description
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

TigerVNC is impacted by the same vulnerability as found in
CVE-2014-6051. An integer overflow, leading to a heap-based buffer
overflow, was found in the way screen sizes were handled.

Impact
=3D=3D=3D=3D=3D=3D

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
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

There is no known workaround at this time.

Resolution
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

All TigerVNC users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose
">=3Dnet-misc/tigervnc-1.4.2"

References
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

[ 1 ] CVE-2014-6051
<a class=3D"moz-txt-link-freetext" href=3D"http://nvd.nist.gov/nvd.=
cfm?cvename=3DCVE-2014-6051">http://nvd.nist.gov/nvd.cfm?cvename=3DCVE-20=
14-6051</a>
[ 2 ] CVE-2014-8240
<a class=3D"moz-txt-link-freetext" href=3D"http://nvd.nist.gov/nvd.=
cfm?cvename=3DCVE-2014-8240">http://nvd.nist.gov/nvd.cfm?cvename=3DCVE-20=
14-8240</a>

Availability
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

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

<a class=3D"moz-txt-link-freetext" href=3D"https://security.gentoo.org/g=
lsa/201612-36">https://security.gentoo.org/glsa/201612-36</a>

Concerns?
=3D=3D=3D=3D=3D=3D=3D=3D=3D

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
<a class=3D"moz-txt-link-abbreviated"
href=3D"mailto:security@gentoo.org"=
>security@gentoo.org</a> or alternatively, you may file a bug at
<a class=3D"moz-txt-link-freetext" href=3D"https://bugs.gentoo.org">https=
://bugs.gentoo.org</a>.

License
=3D=3D=3D=3D=3D=3D=3D

Copyright 2016 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.

<a class=3D"moz-txt-link-freetext" href=3D"http://creativecommons.org/lic=
enses/by-sa/2.5">http://creativecommons.org/licenses/by-sa/2.5</a></pre>
</body>
</html>

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