__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN phpbb2 Cross Site Scripting Vulnerability [DSA-768-1 phpbb2 -- missing input validation] July 27, 2005 17:00 GMT Number P-261 ______________________________________________________________________________ PROBLEM: A vulnerability was discovered in phpbb2, a fully featured and skinneable flat webforum software. PLATFORM: Debian GNU/Linux 3.1(sarge) DAMAGE: A cross-site scripting vulnerability has been detected in phpBB2. Exploiting this vulnerability may allow a remote attacker to inject arbitrary web scripts or HTML via nested tags. SOLUTION: Apply the security updates. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. A remote attacker may execute arbitrary ASSESSMENT: code. The packages Debian is providing are for an older version of phpBB than is currently offered at phpBB’s website. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/p-261.shtml ORIGINAL BULLETIN: http://www.debian.org/security/2005/dsa-768 CVE/CAN: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name= CAN-2005-2161 ______________________________________________________________________________ [***** Start DSA-768-1 phpbb2 -- missing input validation *****] Debian Security Advisory DSA-768-1 phpbb2 -- missing input validation Date Reported: 27 Jul 2005 Affected Packages: phpbb2 Vulnerable: Yes Security database references: In the Debian bugtracking system: Bug 317739. In Mitre's CVE dictionary: CAN-2005-2161. More information: A cross-site scripting vulnerability has been detected in phpBB2, a fully featured and skinneable flat webforum software, that allows remote attackers to inject arbitrary web script or HTML via nested tags. The old stable distribution (woody) does not contain phpbb2. For the stable distribution (sarge) this problem has been fixed in version 2.0.13-6sarge1. For the unstable distribution (sid) this problem has been fixed in version 2.0.13-6sarge1. We recommend that you upgrade your phpbb2 packages. Fixed in: Debian GNU/Linux 3.1 (sarge) Source: http://security.debian.org/pool/updates/main/p/phpbb2/phpbb2_2.0.13+1- 6sarge1.dsc http://security.debian.org/pool/updates/main/p/phpbb2/phpbb2_2.0.13+1- 6sarge1.diff.gz http://security.debian.org/pool/updates/main/p/phpbb2/phpbb2_2.0.13+1.orig.tar. gz Architecture-independent component: http://security.debian.org/pool/updates/main/p/phpbb2/phpbb2-conf- mysql_2.0.13-6sarge1_all.deb http://security.debian.org/pool/updates/main/p/phpbb2/phpbb2- languages_2.0.13-6sarge1_all.deb http://security.debian.org/pool/updates/main/p/phpbb2/phpbb2_2.0.13- 6sarge1_all.deb MD5 checksums of the listed files are available in the original advisory. [***** End DSA-768-1 phpbb2 -- missing input validation *****] _______________________________________________________________________________ CIAC wishes to acknowledge the contributions of Debian for the information contained in this bulletin. _______________________________________________________________________________ CIAC, the Computer Incident Advisory Capability, is the computer security incident response team for the U.S. Department of Energy (DOE) and the emergency backup response team for the National Institutes of Health (NIH). CIAC is located at the Lawrence Livermore National Laboratory in Livermore, California. CIAC is also a founding member of FIRST, the Forum of Incident Response and Security Teams, a global organization established to foster cooperation and coordination among computer security teams worldwide. CIAC services are available to DOE, DOE contractors, and the NIH. CIAC can be contacted at: Voice: +1 925-422-8193 (7x24) FAX: +1 925-423-8002 STU-III: +1 925-423-2604 E-mail: ciac@ciac.org Previous CIAC notices, anti-virus software, and other information are available from the CIAC Computer Security Archive. World Wide Web: http://www.ciac.org/ Anonymous FTP: ftp.ciac.org PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing communities receive CIAC bulletins. If you are not part of these communities, please contact your agency's response team to report incidents. Your agency's team will coordinate with CIAC. The Forum of Incident Response and Security Teams (FIRST) is a world-wide organization. A list of FIRST member organizations and their constituencies can be obtained via WWW at http://www.first.org/. This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial products, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation or favoring by the United States Government or the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes. 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