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Gentoo Linux Security Advisory                           GLSA 201101-02
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                                            https://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:

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

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.

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