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<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
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<glsa id="200503-02">
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<title>phpBB: Multiple vulnerabilities</title>
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<synopsis>
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Several vulnerabilities allow remote attackers to gain phpBB administrator
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rights or expose and manipulate sensitive data.
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</synopsis>
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<product type="ebuild">phpbb</product>
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<announced>2005-03-01</announced>
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<revised count="01">2005-03-01</revised>
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<bug>82955</bug>
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<access>local and remote</access>
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<affected>
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<package name="www-apps/phpBB" auto="yes" arch="*">
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<unaffected range="ge">2.0.13</unaffected>
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<vulnerable range="lt">2.0.13</vulnerable>
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</package>
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</affected>
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<background>
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<p>
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phpBB is an Open Source bulletin board package.
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</p>
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</background>
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<description>
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<p>
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It was discovered that phpBB contains a flaw in the session
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handling code and a path disclosure bug. AnthraX101 discovered that
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phpBB allows local users to read arbitrary files, if the "Enable remote
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avatars" and "Enable avatar uploading" options are set (CAN-2005-0259).
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He also found out that incorrect input validation in
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"usercp_avatar.php" and "usercp_register.php" makes phpBB vulnerable to
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directory traversal attacks, if the "Gallery avatars" setting is
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enabled (CAN-2005-0258).
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</p>
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</description>
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<impact type="normal">
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<p>
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Remote attackers can exploit the session handling flaw to gain
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phpBB administrator rights. By providing a local and a remote location
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for an avatar and setting the "Upload Avatar from a URL:" field to
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point to the target file, a malicious local user can read arbitrary
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local files. By inserting "/../" sequences into the "avatarselect"
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parameter, a remote attacker can exploit the directory traversal
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vulnerability to delete arbitrary files. A flaw in the "viewtopic.php"
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script can be exploited to expose the full path of PHP scripts.
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</p>
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</impact>
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<workaround>
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<p>
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There is no known workaround at this time.
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</p>
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</workaround>
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<resolution>
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<p>
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All phpBB users should upgrade to the latest available version:
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</p>
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<code>
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# emerge --sync
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# emerge --ask --oneshot --verbose ">=www-apps/phpBB-2.0.13"</code>
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</resolution>
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<references>
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<uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0258">CAN-2005-0258</uri>
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<uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0259">CAN-2005-0259</uri>
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<uri link="https://www.phpbb.com/phpBB/viewtopic.php?f=14&t=267563">phpBB announcement</uri>
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</references>
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<metadata tag="requester" timestamp="2005-02-28T14:35:23Z">
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koon
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</metadata>
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<metadata tag="submitter" timestamp="2005-02-28T15:10:08Z">
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DerCorny
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</metadata>
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<metadata tag="bugReady" timestamp="2005-03-01T18:22:22Z">
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koon
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</metadata>
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</glsa>
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