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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200411-32">
<title>phpBB: Remote command execution</title>
<synopsis>
phpBB contains a vulnerability which allows a remote attacker to execute
arbitrary commands with the rights of the web server user.
</synopsis>
<product type="ebuild">phpBB</product>
<announced>November 24, 2004</announced>
<revised>May 22, 2006: 02</revised>
<bug>71681</bug>
<access>remote</access>
<affected>
<package name="www-apps/phpbb" auto="yes" arch="*">
<unaffected range="ge">2.0.11</unaffected>
<vulnerable range="lt">2.0.10</vulnerable>
</package>
</affected>
<background>
<p>
phpBB is an Open Source bulletin board package.
</p>
</background>
<description>
<p>
phpBB contains a vulnerability in the highlighting code and several
vulnerabilities in the username handling code.
</p>
</description>
<impact type="high">
<p>
An attacker can exploit the highlighting vulnerability to access the
PHP exec() function without restriction, allowing them to run arbitrary
commands with the rights of the web server user (for example the apache
user). Furthermore, the username handling vulnerability might be abused
to execute SQL statements on the phpBB database.
</p>
</impact>
<workaround>
<p>
There is a one-line patch which will remediate the remote execution
vulnerability.
</p>
<p>
Locate the following block of code in viewtopic.php:
</p>
<code>
//
// Was a highlight request part of the URI?
//
$highlight_match = $highlight = '';
if (isset($HTTP_GET_VARS['highlight']))
{
// Split words and phrases
$words = explode(' ', trim(htmlspecialchars(urldecode($HTTP_GET_VARS['highlight']))));
for($i = 0; $i &lt; sizeof($words); $i++)
{</code>
<p>
Replace with the following:
</p>
<code>
//
// Was a highlight request part of the URI?
//
$highlight_match = $highlight = '';
if (isset($HTTP_GET_VARS['highlight']))
{
// Split words and phrases
$words = explode(' ', trim(htmlspecialchars($HTTP_GET_VARS['highlight'])));
for($i = 0; $i &lt; sizeof($words); $i++)
{</code>
</workaround>
<resolution>
<p>
All phpBB users should upgrade to the latest version to fix all known
vulnerabilities:
</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=www-apps/phpbb-2.0.11&quot;</code>
</resolution>
<references>
<uri link="http://www.phpbb.com/phpBB/viewtopic.php?t=240513">phpBB.com Announcement</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-1315">CVE-2004-1315</uri>
</references>
<metadata tag="submitter" timestamp="Thu, 18 Nov 2004 17:31:41 +0000">
klieber
</metadata>
<metadata tag="bugReady" timestamp="Wed, 24 Nov 2004 08:51:46 +0000">
jaervosz
</metadata>
</glsa>