glsa-200709-16.xml


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

<glsa id="200709-16">
  <title>Lighttpd: Buffer overflow</title>
  <synopsis>
    Lighttpd is vulnerable to the remote execution of arbitrary code.
  </synopsis>
  <product type="ebuild">lighttpd</product>
  <announced>September 27, 2007</announced>
  <revised>September 27, 2007: 01</revised>
  <bug>191912</bug>
  <access>remote</access>
  <affected>
    <package name="www-servers/lighttpd" auto="yes" arch="*">
      <unaffected range="ge">1.4.18</unaffected>
      <vulnerable range="lt">1.4.18</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    Lighttpd is a lightweight HTTP web server.
    </p>
  </background>
  <description>
    <p>
    Mattias Bengtsson and Philip Olausson have discovered a buffer overflow
    vulnerability in the function fcgi_env_add() in the file mod_fastcgi.c
    when processing overly long HTTP headers.
    </p>
  </description>
  <impact type="high">
    <p>
    A remote attacker could send a specially crafted request to the
    vulnerable Lighttpd server, resulting in the remote execution of
    arbitrary code with privileges of the user running the web server. Note
    that mod_fastcgi is disabled in Gentoo's default configuration.
    </p>
  </impact>
  <workaround>
    <p>
    Edit the file /etc/lighttpd/lighttpd.conf and comment the following
    line: "include mod_fastcgi.conf"
    </p>
  </workaround>
  <resolution>
    <p>
    All Lighttpd users should upgrade to the latest version:
    </p>
    <code>
    # emerge --sync
    # emerge --ask --oneshot --verbose &quot;&gt;=www-servers/lighttpd-1.4.18&quot;</code>
  </resolution>
  <references>
    <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4727">CVE-2007-4727</uri>
  </references>
  <metadata tag="requester" timestamp="Thu, 20 Sep 2007 21:10:23 +0000">
    p-y
  </metadata>
  <metadata tag="bugReady" timestamp="Thu, 20 Sep 2007 21:10:32 +0000">
    p-y
  </metadata>
  <metadata tag="submitter" timestamp="Sat, 22 Sep 2007 16:06:46 +0000">
    p-y
  </metadata>
</glsa>