glsa-200902-02.xml


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<?xml version="1.0" encoding="utf-8"?>
<?xml-stylesheet href="/xsl/glsa.xsl" type="text/xsl"?>
<?xml-stylesheet href="/xsl/guide.xsl" type="text/xsl"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">

<glsa id="200902-02">
  <title>OpenSSL: Certificate validation error</title>
  <synopsis>
    An error in the OpenSSL certificate chain validation might allow for
    spoofing attacks.
  </synopsis>
  <product type="ebuild">openssl</product>
  <announced>February 12, 2009</announced>
  <revised>February 12, 2009: 01</revised>
  <bug>251346</bug>
  <access>remote</access>
  <affected>
    <package name="dev-libs/openssl" auto="yes" arch="*">
      <unaffected range="ge">0.9.8j</unaffected>
      <vulnerable range="lt">0.9.8j</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    OpenSSL is an Open Source toolkit implementing the Secure Sockets Layer
    (SSL v2/v3) and Transport Layer Security (TLS v1) as well as a general
    purpose cryptography library.
    </p>
  </background>
  <description>
    <p>
    The Google Security Team reported that several functions incorrectly
    check the result after calling the EVP_VerifyFinal() function, allowing
    a malformed signature to be treated as a good signature rather than as
    an error. This issue affects the signature checks on DSA and ECDSA keys
    used with SSL/TLS.
    </p>
  </description>
  <impact type="normal">
    <p>
    A remote attacker could exploit this vulnerability and spoof arbitrary
    names to conduct Man-In-The-Middle attacks and intercept sensitive
    information.
    </p>
  </impact>
  <workaround>
    <p>
    There is no known workaround at this time.
    </p>
  </workaround>
  <resolution>
    <p>
    All OpenSSL users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose &quot;&gt;=dev-libs/openssl-0.9.8j&quot;</code>
  </resolution>
  <references>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5077">CVE-2008-5077</uri>
  </references>
  <metadata tag="requester" timestamp="Tue, 13 Jan 2009 17:07:15 +0000">
    rbu
  </metadata>
  <metadata tag="bugReady" timestamp="Tue, 13 Jan 2009 17:07:33 +0000">
    rbu
  </metadata>
  <metadata tag="submitter" timestamp="Tue, 13 Jan 2009 17:14:56 +0000">
    rbu
  </metadata>
</glsa>