glsa-200511-09.xml


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

<glsa id="200511-09">
  <title>Lynx: Arbitrary command execution</title>
  <synopsis>
    Lynx is vulnerable to an issue which allows the remote execution of
    arbitrary commands.
  </synopsis>
  <product type="ebuild">lynx</product>
  <announced>November 13, 2005</announced>
  <revised>November 13, 2005: 01</revised>
  <bug>112213</bug>
  <access>remote</access>
  <affected>
    <package name="www-client/lynx" auto="yes" arch="*">
      <unaffected range="ge">2.8.5-r2</unaffected>
      <vulnerable range="lt">2.8.5-r2</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    Lynx is a fully-featured WWW client for users running
    cursor-addressable, character-cell display devices such as vt100
    terminals and terminal emulators.
    </p>
  </background>
  <description>
    <p>
    iDefense labs discovered a problem within the feature to execute
    local cgi-bin programs via the "lynxcgi:" URI handler. Due to a
    configuration error, the default settings allow websites to specify
    commands to run as the user running Lynx.
    </p>
  </description>
  <impact type="normal">
    <p>
    A remote attacker can entice a user to access a malicious HTTP
    server, causing Lynx to execute arbitrary commands.
    </p>
  </impact>
  <workaround>
    <p>
    Disable "lynxcgi" links by specifying the following directive in
    lynx.cfg:
    </p>
    <code>
    TRUSTED_LYNXCGI:none</code>
  </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-r2&quot;</code>
  </resolution>
  <references>
    <uri link="http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-2929">CVE-2005-2929</uri>
    <uri link="http://www.idefense.com/application/poi/display?id=338&amp;type=vulnerabilities">iDefense Security Advisory 11.11.05</uri>
  </references>
  <metadata tag="requester" timestamp="Fri, 11 Nov 2005 20:17:54 +0000">
    taviso
  </metadata>
  <metadata tag="submitter" timestamp="Fri, 11 Nov 2005 21:30:52 +0000">
    adir
  </metadata>
  <metadata tag="bugReady" timestamp="Sun, 13 Nov 2005 17:03:02 +0000">
    koon
  </metadata>
</glsa>