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Gentoo Linux Security Advisory GLSA 201101-02
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http://security.gentoo.org/
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Severity: High
Title: Tor: Remote heap-based buffer overflow
Date: January 15, 2011
Bugs: #349312
ID: 201101-02

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Synopsis
========

Tor is vulnerable to a heap-based buffer overflow that may allow
arbitrary code execution.

Background
==========

Tor is an implementation of second generation Onion Routing, a
connection-oriented anonymizing communication service.

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

-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-misc/tor < 0.2.1.28 >= 0.2.1.28

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

Tor contains a heap-based buffer overflow in the processing of user or
attacker supplied data. No additional information is available.

Impact
======

Successful exploitation of this vulnerability may allow an
unauthenticated remote attacker to execute arbitrary code with the
permissions of the Tor user, or to cause a Denial of Service.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Tor users should upgrade to the latest stable version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/tor-0.2.1.28"

References
==========

[ 1 ] CVE-2010-1676
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-1676

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

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

http://security.gentoo.org/glsa/glsa-201101-02.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
https://bugs.gentoo.org.

License
=======

Copyright 2011 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