BugTraq
iDefense Security Advisory 09.26.11: Novell GroupWise iCal TZNAME Heap Overflow Vulnerability Sep 27 2011 04:32PM
labs-no-reply (labs-no-reply ivcp vrsn com)
iDefense Security Advisory 09.26.11
http://labs.idefense.com/intelligence/vulnerabilities/
Sep 26, 2011

I. BACKGROUND

GroupWise is Novell's messaging platform, and includes support for
email, calendaring, and instant messaging. More information is available
at the following website:

http://www.novell.com/products/groupwise/

II. DESCRIPTION

Remote exploitation of a heap overflow vulnerability in Novell Inc.'s
GroupWise could allow an attacker to execute arbitrary code with the
privileges of the affected service.

This vulnerability is present in the calendar processing code, which
resides within the GroupWise Internet Agent (GWIA) process. The
vulnerability occurs when parsing a malformed time zone description
field (TZNAME). A heap based buffer overflow can be triggered by
supplying an excessively long string when copying the time zone name.

III. ANALYSIS

Exploitation of this vulnerability results in the execution of arbitrary
code with the privileges of the affected service. On Windows, the GWIA
process runs with SYSTEM privileges. In order to exploit this
vulnerability, an attacker simply needs to send an email to a valid
user, and attach the malicious calendar file to the email. The targeted
user does not need to download or view the email; processing of the iCal
file occurs automatically on the server as soon as the email is received
by the server.

IV. DETECTION

Novell GroupWise 8.0x up to (and including) 8.02HP2 are vulnerable.

V. WORKAROUND

iDefense is currently unaware of any workaround for this issue.

VI. VENDOR RESPONSE

Novell has released fixes which addresses this issue. Information about
downloadable vendor updates can be found by clicking on the URLs shown.

http://www.novell.com/support/search.do?cmd=displayKC&docType=kc&externa
lId=7009208&sliceId=1&docTypeID=DT_TID_1_1&dialogID=268443893&stateId=0%
200%20268449181

VII. CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2011-0333 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org/), which standardizes names for
security problems.

VIII. DISCLOSURE TIMELINE

07/20/2011 Initial Vendor Notification
07/21/2011 Vendor Reply
09/26/2011 Coordinated Public Disclosure

IX. CREDIT

The discoverer of this vulnerability wishes to remain anonymous.

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X. LEGAL NOTICES

Copyright © 2011 Verisign

Permission is granted for the redistribution of this alert
electronically. It may not be edited in any way without the express
written consent of iDefense. If you wish to reprint the whole or any
part of this alert in any other medium other than electronically, please
e-mail customerservice (at) idefense (dot) com [email concealed] for permission.

Disclaimer: The information in the advisory is believed to be accurate
at the time of publishing based on currently available information. Use
of the information constitutes acceptance for use in an AS IS condition.
There are no warranties with regard to this information. Neither the
author nor the publisher accepts any liability for any direct, indirect,
or consequential loss or damage arising from use of, or reliance on,
this information.

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