netVigilance Security Advisory #16 UseBB Version 1.0.4 Path Disclosure Vulnerability Description: UseBB is an Open Source forum package developed in PHP and using the popular MySQL database back-end to store data. Unlike other popular forum systems, UseBB does not strive to have as many features as possible, but to be the easiest and most usable forum package, limiting the basic feature set to only the essential. External References: Mitre CVE: CVE-2007-0691 NVD NIST: CVE-2007-0691 Summary: UseBB is an Open Source forum package developed in PHP and using the popular MySQL database back-end to store data. Unlike other popular forum systems, UseBB does not strive to have as many features as possible, but to be the easiest and most usable forum package, limiting the basic feature set to only the essential. This vulnerabilities can be exploited only when PHP register_globals is On. A security problem in the product allows attackers to gather the true path of the server-side script. Advisory URL: http://www.netvigilance.com/advisory0016 Release Date: 17 April 2007 Severity: Risk: Low CVSS Metrics: Access Vector: Remote Access Complexity: Low Authentication: not-required Confidentiality Impact: Partial Integrity Impact: None Availability Impact: None Impact Bias: Normal CVSS Base Score: 2.05128 Target Distribution on Internet: Low Exploitability: Functional Exploit Remediation Level: Official Fix Report Confidence: Confirmed Vulnerability Impact: Attack Host Impact: Path disclosure. SecureScout Testcase ID: TC 17943 Vulnerable Systems: UseBB Version 1.0.4 Vulnerability Type: Program flaw – The common.php has flaws which lead to Warnings. Vendor Status: The Vendor has confirmed the problem and has release patch version 1.0.6 that addresses the problem. For more information see vendor announcement on http://www.usebb.net/community/topic-1541.html To download the latest version go to vendors product download area here: http://www.usebb.net/downloads/ Workaround: Disable warning messages: modify in the php.ini file following line: display_errors = Off. Or modify .htaccess file (this will work only for the apache servers). Example: REQUEST: http://[TARGET]/[usebb-folder]/index.php?_SERVER REPLY: ... <p>In file <strong>session.php</strong> on line <strong>104</strong>:</p> <p id="error"><em></em> - session_start() [<a href='function.session-start'> function.session-start</a>]: Cannot send session cookie - headers already sent by (output started at [SERVER PATH]\UseBB\sources\common.php:86)</p> ... Credits: Jesper Jurcenoks Co-founder netVigilance, Inc www.netvigilance.com
