Advisory Details

January 25th, 2011

Novell GroupWise Internet Agent REQUEST-STATUS Parsing Remote Code Execution Vulnerability

ZDI-11-025
ZDI-CAN-955

CVE ID CVE-2010-4326
CVSS SCORE 10.0, AV:N/AC:L/Au:N/C:C/I:C/A:C
AFFECTED VENDORS Novell
AFFECTED PRODUCTS Groupwise
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID ['10788']. 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 REQUEST-STATUS 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.

ADDITIONAL DETAILS 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=7007155&sliceId=1&docTypeID=DT_TID_1_1&dialogID=199990003&stateId=0%200%20199988016
DISCLOSURE TIMELINE
  • 2010-09-24 - Vulnerability reported to vendor
  • 2011-01-25 - Coordinated public release of advisory
CREDIT Anonymous
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