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[gentoo-announce] [ GLSA 201703-03 ] PuTTY: Buffer overflow

Posted on 19 March 2017
Gentoo-announce

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From: Thomas Deutschmann <whissi@gentoo.org>
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To: gentoo-announce@lists.gentoo.org
Message-ID: <025be724-6b76-4cc0-c528-1736394c07a4@gentoo.org>
Subject: [ GLSA 201703-03 ] PuTTY: Buffer overflow

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Gentoo Linux Security Advisory GLSA 201703-03
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https://security.gentoo.org/
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Severity: Normal
Title: PuTTY: Buffer overflow
Date: March 19, 2017
Bugs: #610552
ID: 201703-03

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Synopsis
========
A buffer overflow in PuTTY might allow remote attackers to execute
arbitrary code or cause a denial of service.

Background
==========
PuTTY is a free implementation of Telnet and SSH for Windows and Unix
platforms, along with an xterm terminal emulator.

Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-misc/putty < 0.68 >= 0.68

Description
===========
A heap-corrupting buffer overflow bug in the ssh_agent_channel_data
function of PuTTY was found.

Impact
======
A remote attacker, utilizing the SSH agent forwarding of an SSH 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 PuTTY users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/putty-0.68"

References
==========
[ 1 ] CVE-2017-6542
http://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-6542

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

https://security.gentoo.org/glsa/201703-03

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.

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


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