<?xml version="1.0" encoding="utf-8"?> <!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd"> <glsa id="200508-16"> <title>Tor: Information disclosure</title> <synopsis> A flaw in Tor leads to the disclosure of information and the loss of anonymity, integrity and confidentiality. </synopsis> <product type="ebuild">tor</product> <announced>August 25, 2005</announced> <revised>August 25, 2005: 01</revised> <bug>102245</bug> <access>remote</access> <affected> <package name="net-misc/tor" auto="yes" arch="*"> <unaffected range="ge">0.1.0.14</unaffected> <vulnerable range="lt">0.1.0.14</vulnerable> </package> </affected> <background> <p> Tor is an implementation of second generation Onion Routing, a connection-oriented anonymizing communication service. </p> </background> <description> <p> The Diffie-Hellman implementation of Tor fails to verify the cryptographic strength of keys which are used during handshakes. </p> </description> <impact type="low"> <p> 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. </p> </impact> <workaround> <p> There is no known workaround at this time. </p> </workaround> <resolution> <p> All Tor users should upgrade to the latest version: </p> <code> # emerge --sync # emerge --ask --oneshot --verbose ">=net-misc/tor-0.1.0.14"</code> </resolution> <references> <uri link="http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2643">CAN-2005-2643</uri> <uri link="http://archives.seul.org/or/announce/Aug-2005/msg00002.html">Tor Security Announcement</uri> </references> <metadata tag="requester" timestamp="Tue, 23 Aug 2005 08:23:08 +0000"> koon </metadata> <metadata tag="bugReady" timestamp="Tue, 23 Aug 2005 09:42:34 +0000"> koon </metadata> <metadata tag="submitter" timestamp="Tue, 23 Aug 2005 16:08:44 +0000"> DerCorny </metadata> </glsa>