glsa-200609-05.xml


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

<glsa id="200609-05">
  <title>OpenSSL, AMD64 x86 emulation base libraries: RSA signature forgery</title>
  <synopsis>
    OpenSSL fails to properly validate PKCS #1 v1.5 signatures.
  </synopsis>
  <product type="ebuild">openssl</product>
  <announced>September 07, 2006</announced>
  <revised>September 08, 2006: 02</revised>
  <bug>146375</bug>
  <bug>146438</bug>
  <access>remote</access>
  <affected>
    <package name="dev-libs/openssl" auto="yes" arch="*">
      <unaffected range="ge">0.9.7k</unaffected>
      <vulnerable range="lt">0.9.7k</vulnerable>
    </package>
    <package name="app-emulation/emul-linux-x86-baselibs" auto="yes" arch="amd64">
      <unaffected range="ge">2.5.2</unaffected>
      <vulnerable range="lt">2.5.2</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    OpenSSL is a toolkit implementing the Secure Sockets Layer, Transport
    Layer Security protocols and a general-purpose cryptography library.
    The x86 emulation base libraries for AMD64 contain a vulnerable version
    of OpenSSL.
    </p>
  </background>
  <description>
    <p>
    Daniel Bleichenbacher discovered that it might be possible to forge
    signatures signed by RSA keys with the exponent of 3.
    </p>
  </description>
  <impact type="normal">
    <p>
    Since several CAs are using an exponent of 3 it might be possible for
    an attacker to create a key with a false CA signature.
    </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-0.9.7k&quot;</code>
    <p>
    All AMD64 x86 emulation base libraries users should upgrade to the
    latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose &quot;&gt;=app-emulation/emul-linux-x86-baselibs-2.5.2&quot;</code>
  </resolution>
  <references>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4339">CVE-2006-4339</uri>
  </references>
  <metadata tag="requester" timestamp="Tue, 05 Sep 2006 19:16:58 +0000">
    jaervosz
  </metadata>
  <metadata tag="submitter" timestamp="Wed, 06 Sep 2006 10:57:51 +0000">
    jaervosz
  </metadata>
  <metadata tag="bugReady" timestamp="Thu, 07 Sep 2006 20:02:33 +0000">
    jaervosz
  </metadata>
</glsa>