GLSA 200408-04: PuTTY
Posted on: 08/05/2004 08:10 AM

A PuTTY update has been released for Gentoo Linux

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Gentoo Linux Security Advisory GLSA 200408-04
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http://security.gentoo.org/
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Severity: Normal
Title: PuTTY: Pre-authentication arbitrary code execution
Date: August 05, 2004
Bugs: #59383
ID: 200408-04

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Synopsis
=======

PuTTY contains a vulnerability allowing a SSH server to execute arbitrary code on the connecting client.

Background
=========

PuTTY is a free implementation of Telnet and SSH for Win32 and Unix platforms, along with an xterm terminal emulator.

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

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Package / Vulnerable / Unaffected
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1 net-misc/putty <= 0.54 >= 0.55

Description
==========

PuTTY contains a vulnerability allowing a malicious server to execute arbitrary code on the connecting client before host key verification.

Impact
=====

When connecting to a server using the SSH2 protocol an attacker is able to execute arbitrary code with the permissions of the user running PuTTY by sending specially crafted packets to the client during the authentication process but before host key verification.

Workaround
=========

There is no known workaround at this time. All users are encouraged to upgrade to the latest available version of PuTTY.

Resolution
=========

All PuTTY users should upgrade to the latest version:

# emerge sync

# emerge -pv ">=net-misc/putty-0.55"
# emerge ">=net-misc/putty-0.55"

References
=========

[ 1 ] PuTTY ChangeLog
http://www.chiark.greenend.org.uk/~sgtatham/putty/changes.html

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

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

http://security.gentoo.org/glsa/glsa-200408-04.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 2004 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/1.0


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