From: Sune Kloppenborg Jeppesen <jaervosz@gentoo.org.>
To: gentoo-announce@gentoo.org
Subject: [ GLSA 200508-16 ] Tor: Information disclosure
Date: Thu, 25 Aug 2005 07:14:03 +0200
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Cc: bugtraq@securityfocus.com, full-disclosure@lists.grok.org.uk,
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Organization: Gentoo Linux Security Team
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Gentoo Linux Security Advisory GLSA 200508-16
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http://security.gentoo.org/
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Severity: Low
Title: Tor: Information disclosure
Date: August 25, 2005
Bugs: #102245
ID: 200508-16
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Synopsis
========
A flaw in Tor leads to the disclosure of information and the loss of
anonymity, integrity and confidentiality.
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 < 0.1.0.14 >= 0.1.0.14
Description
===========
The Diffie-Hellman implementation of Tor fails to verify the
cryptographic strength of keys which are used during handshakes.
Impact
======
By setting up a malicious Tor server and enticing users to use this
server as first hop, a remote attacker could read and modify all
traffic of the user.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All Tor users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/tor-0.1.0.14"
References
==========
[ 1 ] CAN-2005-2643
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2643
[ 2 ] Tor Security Announcement
http://archives.seul.org/or/announce/Aug-2005/msg00002.html
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200508-16.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 2005 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/2.0
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