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<?xml version="1.0" encoding="utf-8"?>
<glsa id="200508-16">
<title>Tor: Information disclosure</title>
A flaw in Tor leads to the disclosure of information and the loss of
anonymity, integrity and confidentiality.
<product type="ebuild">tor</product>
<announced>August 25, 2005</announced>
<revised>August 25, 2005: 01</revised>
<package name="net-misc/tor" auto="yes" arch="*">
<unaffected range="ge"></unaffected>
<vulnerable range="lt"></vulnerable>
Tor is an implementation of second generation Onion Routing, a
connection-oriented anonymizing communication service.
The Diffie-Hellman implementation of Tor fails to verify the
cryptographic strength of keys which are used during handshakes.
<impact type="low">
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.
There is no known workaround at this time.
All Tor users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=net-misc/tor-;</code>
<uri link="">CAN-2005-2643</uri>
<uri link="">Tor Security Announcement</uri>
<metadata tag="requester" timestamp="Tue, 23 Aug 2005 08:23:08 +0000">
<metadata tag="bugReady" timestamp="Tue, 23 Aug 2005 09:42:34 +0000">
<metadata tag="submitter" timestamp="Tue, 23 Aug 2005 16:08:44 +0000">