glsa-200402-04.xml


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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200402-04">
  <title>Gallery 1.4.1 and below remote exploit vulnerability</title>
  <synopsis>
    The Gallery developers have discovered a potentially serious security flaw
    in Gallery 1.3.1, 1.3.2, 1.3.3, 1.4 and 1.4.1 which can allow a 
    remote exploit of your webserver.
  </synopsis>
  <product type="ebuild">Gallery</product>
  <announced>2004-02-11</announced>
  <revised count="01">2004-02-11</revised>
  <bug>39638</bug>
  <access>remote</access>
  <affected>
    <package name="www-apps/gallery" auto="yes" arch="*">
      <unaffected range="ge">1.4.1_p1</unaffected>
      <vulnerable range="lt">1.4.1_p1</vulnerable>
    </package>
  </affected>
  <background>
    <p>
    Gallery is an open source image management system written in PHP.
    More information is available at http://gallery.sourceforge.net
    </p>
  </background>
  <description>
    <p>
    Starting in the 1.3.1 release, Gallery includes code to simulate the behaviour
    of the PHP 'register_globals' variable in environments where that setting
    is disabled.  It is simulated by extracting the values of the various
    $HTTP_ global variables into the global namespace.
    </p>
  </description>
  <impact type="normal">
    <p>
    A crafted URL such as 
    http://example.com/gallery/init.php?HTTP_POST_VARS=xxx  causes the
    'register_globals' simulation code to overwrite the $HTTP_POST_VARS which,
    when it is extracted, will deliver the given payload. If the
    payload compromises $GALLERY_BASEDIR then the malicious user can perform a
    PHP injection exploit and gain remote access to the webserver with PHP 
    user UID access rights.
    </p>
  </impact>
  <workaround>
    <p>
    The workaround for the vulnerability is to replace init.php and
    setup/init.php with the files in the following ZIP file:
    http://prdownloads.sourceforge.net/gallery/patch_1.4.1-to-1.4.1-pl1.zip?download 
    </p>
  </workaround>
  <resolution>
    <p>
    All users are encouraged to upgrade their gallery installation:
    </p>
    <code>
    # emerge sync
    # emerge -p "&gt;=www-apps/gallery-1.4.1_p1"
    # emerge "&gt;=www-apps/gallery-1.4.1_p1"</code>
  </resolution>
  <references>
  </references>
</glsa>