[ GLSA 201101-02 ] Tor: Remote heap-based buffer overflow

[Tim Sammut <underling () gentoo org>]

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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

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