================================================= Kereval Security Advisory [KSA-003] Cross Site Scripting Vulnerability in Phpgroupware ================================================= PROGRAM: Phpgroupware HOMEPAGE: http://www.phpgroupware.org/ VULNERABLE VERSIONS: 0.9.14.003 RISK: Low/Medium IMPACT: CSS RELEASE DATE: 2003-07-02 ================================================= TABLE OF CONTENTS ================================================= 1..........................................................DESCRIPTION 2..............................................................DETAILS 3.............................................................EXPLOITS 4............................................................SOLUTIONS 5...........................................................WORKAROUND 6..................................................DISCLOSURE TIMELINE 7..............................................................CREDITS 8...........................................................DISCLAIMER 9...........................................................REFERENCES 10............................................................FEEDBACK 1. DESCRIPTION ================================================= "phpGroupWare (formerly known as webdistro) is a multi-user groupware suite written in PHP. It provides a Web-based calendar, todo-list, addressbook, email, news headlines, and a file manager. The calendar supports repeating events. The email system supports inline graphics and file attachments. The system as a whole supports user preferences, themes, user permissions, multi-language support, an advanced API, and user groups." (direct quote from http://www.phpgroupware.org) 2. DETAILS ================================================= ¤ Cross Site Scripting : Many exploitable bugs was found in Phpgroupware which cause script execution on client's computer by following a crafted url. This kind of attack known as "Cross-Site Scripting Vulnerability" is present in many section of the web site, an attacker can input specially crafted links and/or other malicious scripts. 3. EXPLOIT ================================================= ¤ Cross Site Scripting : Affected modules : all the additionnal modules with forms. Ex : http://[target]/addressbook/index.php? You can add a contact and put <script>alert();</script> in the name or surname. If you put something in the contact label the script is executed at this level. A dialog box is oppened on the client browser. 4. SOLUTIONS ================================================= ¤ Cross Site Scripting : Use the function php eregi_replace to filter the input data. 5. WORKAROUND ================================================= The phpgroupware team will correct these issues in the next release. 6. DISCLOSURE TIMELINE ================================================= 06/24/2003 Vendor notified 06/25/2003 Vendor response and solutions 07/01/2003 Vendor authorisation 07/01/2003 Security Corporation clients notified 07/02/2003 Public disclosure 7. CREDITS ================================================= Discovered by François SORIN <francois.sorin@security-corporation.com> 8. DISLAIMER ================================================= The information within this paper may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties with regard to this information. In no event shall the author be liable for any damages whatsoever arising out of or in connection with the use or spread of this information. Any use of this information is at the user's own risk. 9. REFERENCES ================================================= - http://www.security-corporation.com/articles-20030702-005.html 10. FEEDBACK ================================================= Please send suggestions, updates, and comments to: Kereval Immeuble Le Gallium 80, avenue des Buttes de Coesmes 35700 RENNES - FRANCE infoat_private
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