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Category:   Application (Calendar)  >   iCal Vendors:   Brown Bear Software
Brown Bear Software's iCal Web Calendar Server Can Be Crashed By Remote Users
SecurityTracker Alert ID:  1005880
SecurityTracker URL:
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Jan 3 2003
Impact:   Denial of service via network, Disclosure of system information
Exploit Included:  Yes  
Version(s): 3.7
Description:   Securma Massine reported two denial of service vulnerabilities in Brown Bear Software's iCal calendar server. A remote user can cause the server to crash.

A remote user can connect to the server and send specially crafted requests to cause the calendar service to crash.

A remote user can request the following URL to cause the server to display the installation path and crash:


A remote user can send the following type of string to the server on port 80 to trigger an access violation in ICAL.EXE:


The vendor has reportedly been notified.

Impact:   A remote user can cause the service to crash. A remote user can determine the installation path of the server.
Solution:   No solution was available at the time of this entry.
Vendor URL: (Links to External Site)
Cause:   Exception handling error, Input validation error
Underlying OS:  Windows (Any)

Message History:   None.

 Source Message Contents

Subject:  ical 3.7 remote dos

iCal ( a web-based calendar 
that can be used to show meetings,
 events, or other schedules. calendars can be viewed, 
 and administered totally through the web. iCal is build 
 thin-clients, so access calendar without any plug-ins 
 or java interpreters.
I found two vulnerabilities has ical 3.7 
error message:Unable to write to D:\program files\iCl 3.7 
Web Calender\*.cal (the server is down)

 2-nc target 80
[ enter ] 
error message:Access violation at address 00403d8b in 
module'ICAL.EXE' Read of address 0161c1af

ical is alerted the 26/12/2002 

securma massine

Gagne une PS2 ! Envoie un SMS avec le code PS au 61166


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