28 September 2011
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AUSCERT External Security Bulletin Redistribution
Novell GroupWise iCal TZNAME Heap Overflow Vulnerability
28 September 2011
AusCERT Security Bulletin Summary
Product: GroupWise 8.0x
Operating System: SUSE
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
CVE Names: CVE-2011-0333
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iDefense Security Advisory 09.26.11
Sep 26, 2011
GroupWise is Novell's messaging platform, and includes support for
email, calendaring, and instant messaging. More information is available
at the following website:
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.
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.
Novell GroupWise 8.0x up to (and including) 8.02HP2 are vulnerable.
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.
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
VIII. DISCLOSURE TIMELINE
07/20/2011 Initial Vendor Notification
07/21/2011 Vendor Reply
09/26/2011 Coordinated Public Disclosure
The discoverer of this vulnerability wishes to remain anonymous.
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Copyright Â© 2011 Verisign
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