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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200503-29">
<title>GnuPG: OpenPGP protocol attack</title>
<synopsis>
Automated systems using GnuPG may leak plaintext portions of an encrypted
message.
</synopsis>
<product type="ebuild">GnuPG</product>
<announced>March 24, 2005</announced>
<revised>March 24, 2005: 01</revised>
<bug>85547</bug>
<access>remote</access>
<affected>
<package name="app-crypt/gnupg" auto="yes" arch="*">
<unaffected range="ge">1.4.1</unaffected>
<vulnerable range="lt">1.4.1</vulnerable>
</package>
</affected>
<background>
<p>
GnuPG is complete and free replacement for PGP, a tool for secure
communication and data storage.
</p>
</background>
<description>
<p>
A flaw has been identified in an integrity checking mechanism of
the OpenPGP protocol.
</p>
</description>
<impact type="low">
<p>
An automated system using GnuPG that allows an attacker to
repeatedly discover the outcome of an integrity check (perhaps by
observing the time required to return a response, or via overly verbose
error messages) could theoretically reveal a small portion of
plaintext.
</p>
</impact>
<workaround>
<p>
There is no known workaround at this time.
</p>
</workaround>
<resolution>
<p>
All GnuPG users should upgrade to the latest version:
</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=app-crypt/gnupg-1.4.1&quot;</code>
</resolution>
<references>
<uri link="http://www.kb.cert.org/vuls/id/303094">CERT VU#303094</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0366">CAN-2005-0366</uri>
</references>
<metadata tag="requester" timestamp="Wed, 23 Mar 2005 17:12:46 +0000">
koon
</metadata>
<metadata tag="submitter" timestamp="Thu, 24 Mar 2005 12:34:11 +0000">
taviso
</metadata>
<metadata tag="bugReady" timestamp="Thu, 24 Mar 2005 21:44:14 +0000">
koon
</metadata>
</glsa>