VUPEN Security Research - Novell GroupWise VCALENDAR "TZID" Variable Remote 
Buffer Overflow Vulnerability (VUPEN-SR-2011-004)

http://www.vupen.com/english/research.php


I. BACKGROUND
---------------------

"Novell GroupWise collaboration software is a premier collaboration tool
for large enterprise. Look no further than Novell for your collaboration
software." (Wikipedia)


II. DESCRIPTION
---------------------

VUPEN Vulnerability Research Team discovered a critical vulnerability
in Novell GroupWise.

The vulnerability is caused by a buffer overflow error in the "gwwww1.dll"
module when processing the "TZID" variable within VCALENDAR data, which
could be exploited by remote unauthenticated attackers to execute arbitrary
code with SYSTEM privileges.

CVSS Score: 10 (AV:N/AC:L/Au:N/C:C/I:C/A:C)


III. AFFECTED PRODUCTS
---------------------------

Novell GroupWise version 8.02 HP 1 (Hot Patch 1) and prior


IV. Binary Analysis & Exploits/PoCs
---------------------------------------

In-depth binary analysis of the vulnerability and a code execution exploit
are available through the VUPEN Binary Analysis & Exploits Service :

http://www.vupen.com/english/services/ba-index.php


V. VUPEN Threat Protection Program
-----------------------------------

Organizations and corporations which are members of the VUPEN Threat
Protection Program (TPP) receive advanced notifications about security
vulnerabilities discovered by VUPEN, and have access to a detailed detection
guidance to proactively protect national and critical infrastructures
against potential attacks exploiting this vulnerability:

http://www.vupen.com/english/services/tpp-index.php


VI. SOLUTION
----------------

Upgrade to Novell GroupWise version 8.02 HP 2 (Hot Patch 2).


VII. CREDIT
--------------

This vulnerability was discovered by Sebastien Renaud of VUPEN Security


VIII. ABOUT VUPEN Security
---------------------------

VUPEN is a leading IT security research company providing vulnerability
management and security intelligence solutions which enable enterprises
and institutions to eliminate vulnerabilities before they can be exploited,
ensure security policy compliance and meaningfully measure and manage risks.

Governmental and federal agencies, and global enterprises in the financial
services, insurance, manufacturing and technology industries rely on VUPEN
to improve their security, prioritize resources, cut time and costs, and
stay ahead of the latest threats.

* VUPEN Vulnerability Notification Service (VNS) :
http://www.vupen.com/english/services/vns-index.php

* VUPEN Binary Analysis & Exploits Service (BAE) :
http://www.vupen.com/english/services/ba-index.php

* VUPEN Threat Protection Program for Govs (TPP) :
http://www.vupen.com/english/services/tpp-index.php

* VUPEN Web Application Security Scanner (WASS) :
http://www.vupen.com/english/services/wass-index.php


IX. REFERENCES
----------------------

http://www.vupen.com/english/research-vuln.php
http://www.vupen.com/english/advisories/2011/0220
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-4325
http://www.novell.com/support/viewContent.do?externalId=7007638&sliceId=1


X. DISCLOSURE TIMELINE
-----------------------------

2010-11-22 - Vulnerability discovered
2010-xx-xx - Vulnerability rediscovered by third parties including ZDI
2011-01-25 - Novell fix released