glsa-200510-15.xml


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

<glsa id="200510-15">
  <title>Lynx: Buffer overflow in NNTP processing</title>
  <synopsis>
    Lynx contains a buffer overflow that may be exploited to execute arbitrary
    code.
  </synopsis>
  <product type="ebuild">Lynx</product>
  <announced>October 17, 2005</announced>
  <revised>October 17, 2005: 01</revised>
  <bug>108451</bug>
  <access>remote</access>
  <affected>
    <package name="www-client/lynx" auto="yes" arch="*">
      <unaffected range="ge">2.8.5-r1</unaffected>
      <vulnerable range="lt">2.8.5-r1</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    Lynx is a text-mode browser for the World Wide Web. It supports
    multiple URL types, including HTTP and NNTP URLs.
    </p>
  </background>
  <description>
    <p>
    When accessing a NNTP URL, Lynx connects to a NNTP server and
    retrieves information about the available articles in the target
    newsgroup. Ulf Harnhammar discovered a buffer overflow in a function
    that handles the escaping of special characters.
    </p>
  </description>
  <impact type="normal">
    <p>
    An attacker could setup a malicious NNTP server and entice a user
    to access it using Lynx (either by creating NNTP links on a web page or
    by forcing a redirect for Lynx users). The data returned by the NNTP
    server would trigger the buffer overflow and execute arbitrary code
    with the rights of the user running Lynx.
    </p>
  </impact>
  <workaround>
    <p>
    There is no known workaround at this time.
    </p>
  </workaround>
  <resolution>
    <p>
    All Lynx users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose &quot;&gt;=www-client/lynx-2.8.5-r1&quot;</code>
  </resolution>
  <references>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-3120">CAN-2005-3120</uri>
  </references>
  <metadata tag="submitter" timestamp="Sat, 15 Oct 2005 09:30:52 +0000">
    koon
  </metadata>
  <metadata tag="bugReady" timestamp="Mon, 17 Oct 2005 12:46:58 +0000">
    koon
  </metadata>
</glsa>