glsa-200503-29.xml


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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>