-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Title: phpEventCalendar HTML injection Vulnerability discovery: Madelman Date: 25/01/2005 Severity: Medium. Registered users can obtain other users cookies Summary: - -------- phpEventCalendar is a MySQL backed application that allows users to post and display events or notes on a month-at-a-glance calendar. A user administration panel allows authorized users (Administrators) to control who can add, delete, and edit events (Editors). (from vendor site: http://www.ikemcg.com/scripts/pec/index.html) phpEventCalendar doesn't check title and text of events inserted in the database, so we can inject arbitrary HTML which will be executed by other users. This vulnerability has been tested with phpEventCalendar 0.2 Details: - -------- When inserting a new event into the system, phpEventCalendar doesn't check the values of title and text variables, it only escapes it when necessary to avoid SQL injection. These variables will be later retrieved by other user viewing the calendar and showed with strip_slashes so we can write arbitrary HTML (or Javascript) which will be executed by other users when they look at the calendar (if inserted in title, but take care there's a limit in the length of the title shown in the calendar) or when they look at the individual entry. Example of exploitation: Insert an event with text: Solution: - --------- Upgrade to phpEventCalendar 0.2.1 Timeline - -------- 07/01/2005 - Vulnerability found 07/01/2005 - Vendor contacted 08/01/2005 - Vendor replied confirming bug 18/01/2005 - New version released 25/01/2005 - Advisory released -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.3 (MingW32) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFB9pIg3RWooxY20cIRAtDzAKCCr/Uh64X4NaCXvFgjTUaHn0l7aQCZARDF 1l2Zx92XmzX+j825gG871AY= =waZY -----END PGP SIGNATURE-----