glsa-200510-11.xml


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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200510-11">
  <title>OpenSSL: SSL 2.0 protocol rollback</title>
  <synopsis>
    When using a specific option, OpenSSL can be forced to fallback to the less
    secure SSL 2.0 protocol.
  </synopsis>
  <product type="ebuild">OpenSSL</product>
  <announced>2005-10-12</announced>
  <revised count="02">2005-11-07</revised>
  <bug>108852</bug>
  <access>remote</access>
  <affected>
    <package name="dev-libs/openssl" auto="yes" arch="*">
      <unaffected range="ge">0.9.7h</unaffected>
      <unaffected range="rge">0.9.7g-r1</unaffected>
      <unaffected range="rge">0.9.7e-r2</unaffected>
      <vulnerable range="lt">0.9.7h</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    OpenSSL is a toolkit implementing the Secure Sockets Layer, Transport
    Layer Security protocols and a general-purpose cryptography library.
    </p>
  </background>
  <description>
    <p>
    Applications setting the SSL_OP_MSIE_SSLV2_RSA_PADDING option (or the
    SSL_OP_ALL option, that implies it) can be forced by a third-party to
    fallback to the less secure SSL 2.0 protocol, even if both parties
    support the more secure SSL 3.0 or TLS 1.0 protocols.
    </p>
  </description>
  <impact type="low">
    <p>
    A man-in-the-middle attacker can weaken the encryption used to
    communicate between two parties, potentially revealing sensitive
    information.
    </p>
  </impact>
  <workaround>
    <p>
    If possible, disable the use of SSL 2.0 in all OpenSSL-enabled
    applications.
    </p>
  </workaround>
  <resolution>
    <p>
    All OpenSSL users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose dev-libs/openssl</code>
  </resolution>
  <references>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2969">CAN-2005-2969</uri>
    <uri link="https://www.openssl.org/news/secadv_20051011.txt ">OpenSSL security advisory</uri>
  </references>
  <metadata tag="requester" timestamp="2005-10-11T07:50:27Z">
    koon
  </metadata>
  <metadata tag="submitter" timestamp="2005-10-11T08:03:33Z">
    koon
  </metadata>
  <metadata tag="bugReady" timestamp="2005-10-12T07:47:42Z">
    koon
  </metadata>
</glsa>