TippingPoint Zero Day Initiative
 

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

ZDI-11-025: January 25th, 2011

CVE ID

CVSS Score

Affected Vendors

Affected Products

    Groupwise

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 10788. For further product information on the TippingPoint IPS:

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.

Vendor Response

Novell has issued an update to correct this vulnerability. More details can be found at:

Disclosure Timeline

    2010-09-24 - Vulnerability reported to vendor
    2011-01-25 - Coordinated public release of advisory

Credit

This vulnerability was discovered by:
    Anonymous