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<?xml version="1.0" encoding="utf-8"?>
<?xml-stylesheet href="/xsl/glsa.xsl" type="text/xsl"?>
<?xml-stylesheet href="/xsl/guide.xsl" type="text/xsl"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200503-02">
<title>phpBB: Multiple vulnerabilities</title>
<synopsis>
Several vulnerabilities allow remote attackers to gain phpBB administrator
rights or expose and manipulate sensitive data.
</synopsis>
<product type="ebuild">phpbb</product>
<announced>March 01, 2005</announced>
<revised>March 01, 2005: 01</revised>
<bug>82955</bug>
<access>local and remote</access>
<affected>
<package name="www-apps/phpBB" auto="yes" arch="*">
<unaffected range="ge">2.0.13</unaffected>
<vulnerable range="lt">2.0.13</vulnerable>
</package>
</affected>
<background>
<p>
phpBB is an Open Source bulletin board package.
</p>
</background>
<description>
<p>
It was discovered that phpBB contains a flaw in the session
handling code and a path disclosure bug. AnthraX101 discovered that
phpBB allows local users to read arbitrary files, if the "Enable remote
avatars" and "Enable avatar uploading" options are set (CAN-2005-0259).
He also found out that incorrect input validation in
"usercp_avatar.php" and "usercp_register.php" makes phpBB vulnerable to
directory traversal attacks, if the "Gallery avatars" setting is
enabled (CAN-2005-0258).
</p>
</description>
<impact type="normal">
<p>
Remote attackers can exploit the session handling flaw to gain
phpBB administrator rights. By providing a local and a remote location
for an avatar and setting the "Upload Avatar from a URL:" field to
point to the target file, a malicious local user can read arbitrary
local files. By inserting "/../" sequences into the "avatarselect"
parameter, a remote attacker can exploit the directory traversal
vulnerability to delete arbitrary files. A flaw in the "viewtopic.php"
script can be exploited to expose the full path of PHP scripts.
</p>
</impact>
<workaround>
<p>
There is no known workaround at this time.
</p>
</workaround>
<resolution>
<p>
All phpBB users should upgrade to the latest available version:
</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose ">=www-apps/phpBB-2.0.13"</code>
</resolution>
<references>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0258">CAN-2005-0258</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0259">CAN-2005-0259</uri>
<uri link="http://www.phpbb.com/phpBB/viewtopic.php?f=14&t=267563">phpBB announcement</uri>
</references>
<metadata tag="requester" timestamp="Mon, 28 Feb 2005 14:35:23 +0000">
koon
</metadata>
<metadata tag="submitter" timestamp="Mon, 28 Feb 2005 15:10:08 +0000">
DerCorny
</metadata>
<metadata tag="bugReady" timestamp="Tue, 1 Mar 2005 18:22:22 +0000">
koon
</metadata>
</glsa>
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