glsa-200909-15.xml


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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200909-15">
  <title>Lynx: Arbitrary command execution</title>
  <synopsis>
    An incomplete fix for an issue related to the Lynx URL handler might allow
    for the remote execution of arbitrary commands.
  </synopsis>
  <product type="ebuild">lynx</product>
  <announced>2009-09-12</announced>
  <revised count="01">2009-09-12</revised>
  <bug>243058</bug>
  <access>remote</access>
  <affected>
    <package name="www-client/lynx" auto="yes" arch="*">
      <unaffected range="ge">2.8.6-r4</unaffected>
      <vulnerable range="lt">2.8.6-r4</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>
    Clint Ruoho reported that the fix for CVE-2005-2929 (GLSA 200511-09)
    only disabled the lynxcgi:// handler when not using the advanced mode.
    </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. NOTE: The advanced mode is
    not enabled by default. Successful exploitation requires the
    "lynxcgi://" protocol to be registered with lynx on the victim's
    system.
    </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 "&gt;=www-client/lynx-2.8.6-r4"</code>
  </resolution>
  <references>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-2929">CVE-2005-2929</uri>
    <uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4690">CVE-2008-4690</uri>
    <uri link="https://www.gentoo.org/security/en/glsa/glsa-200511-09.xml">GLSA 200511-09</uri>
  </references>
  <metadata tag="requester" timestamp="2009-08-07T11:47:31Z">
    rbu
  </metadata>
  <metadata tag="submitter" timestamp="2009-08-28T08:16:43Z">
    a3li
  </metadata>
  <metadata tag="bugReady" timestamp="2009-08-31T03:37:19Z">
    a3li
  </metadata>
</glsa>