glsa-200511-07.xml


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

<glsa id="200511-07">
  <title>OpenVPN: Multiple vulnerabilities</title>
  <synopsis>
    The OpenVPN client is potentially vulnerable to the execution of arbitrary
    code and the OpenVPN server is vulnerable to a Denial of Service issue.
  </synopsis>
  <product type="ebuild">OpenVPN</product>
  <announced>November 06, 2005</announced>
  <revised>November 06, 2005: 01</revised>
  <bug>111116</bug>
  <access>remote</access>
  <affected>
    <package name="net-misc/openvpn" auto="yes" arch="*">
      <unaffected range="ge">2.0.4</unaffected>
      <vulnerable range="lt">2.0.4</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    OpenVPN is a multi-platform, full-featured SSL VPN solution.
    </p>
  </background>
  <description>
    <p>
    The OpenVPN client contains a format string bug in the handling of
    the foreign_option in options.c. Furthermore, when the OpenVPN server
    runs in TCP mode, it may dereference a NULL pointer under specific
    error conditions.
    </p>
  </description>
  <impact type="normal">
    <p>
    A remote attacker could setup a malicious OpenVPN server and trick
    the user into connecting to it, potentially executing arbitrary code on
    the client's computer. A remote attacker could also exploit the NULL
    dereference issue by sending specific packets to an OpenVPN server
    running in TCP mode, resulting in a Denial of Service condition.
    </p>
  </impact>
  <workaround>
    <p>
    Do not use "pull" or "client" options in the OpenVPN client
    configuration file, and use UDP mode for the OpenVPN server.
    </p>
  </workaround>
  <resolution>
    <p>
    All OpenVPN users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose &quot;&gt;=net-misc/openvpn-2.0.4&quot;</code>
  </resolution>
  <references>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3393">CVE-2005-3393</uri>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3409">CVE-2005-3409</uri>
    <uri link="http://openvpn.net/changelog.html">OpenVPN changelog</uri>
  </references>
  <metadata tag="requester" timestamp="Wed, 02 Nov 2005 12:34:18 +0000">
    koon
  </metadata>
  <metadata tag="submitter" timestamp="Fri, 04 Nov 2005 13:01:51 +0000">
    koon
  </metadata>
  <metadata tag="bugReady" timestamp="Sun, 06 Nov 2005 14:23:34 +0000">
    koon
  </metadata>
</glsa>