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AUSCERT External Security Bulletin Redistribution
ESB-2011.0097
Novell GroupWise Internet Agent TZID Parsing Remote Code
Execution Vulnerability
28 January 2011
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AusCERT Security Bulletin Summary
---------------------------------
Product: Novell GroupWise Internet Agent
Publisher: Zero Day Initiative
Operating System: Windows
Netware
Linux variants
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2010-4325
Original Bulletin:
http://www.zerodayinitiative.com/advisories/ZDI-11-027/
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Novell GroupWise Internet Agent TZID Parsing Remote Code Execution
Vulnerability
ZDI-11-027: January 26th, 2011
CVE ID
CVE-2010-4325
CVSS Score
10, (AV:N/AC:L/Au:N/C:C/I:C/A:C)
Affected Vendors
Novell
Affected Products
Groupwise
TippingPoint IPS Customer Protection
TippingPoint IPS customers are protected against this vulnerability by Digital
Vaccine protection filter ID 10797. For further product information on the
TippingPoint IPS:
http://www.tippingpoint.com
Vulnerability Details
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Novell GroupWise. Authentication is not required
to exploit this vulnerability.
The specific flaw exists within the gwwww1.dll module responsible for parsing
VCALENDAR data within e-mail messages. When the code encounters a TZID
variable it allocates up to 0xFFFF bytes for the variable's value. It then
proceeds to copy the value into the fixed-length buffer without checking if it
will fit. By specifying a large enough string in the e-mail, an attacker can
overflow the buffer and execute arbitrary code under the context of the
SYSTEM user.
Vendor Response
Novell has issued an update to correct this vulnerability. More details can be
found at:
http://www.novell.com/support/search.do?cmd=displayKC&docType=kc&externalId=7007638&sliceId=1&docTypeID=DT_TID_1_1&dialogID=199990255&stateId=0%200%20199988170
Disclosure Timeline
2010-11-30 - Vulnerability reported to vendor
2011-01-26 - Coordinated public release of advisory
Credit
This vulnerability was discovered by:
Anonymous
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