TippingPoint Zero Day Initiative

Novell Groupwise Client DOCX Loader Relationship Id Remote Code Execution Vulnerability

ZDI-11-286: October 14th, 2011

CVSS Score

Affected Vendors

Affected Products


TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 11547. 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 Client. User interaction is required to exploit this vulnerability in that the target must open a malicious e-mail message.

The specific flaw exists within the component responsible for parsing DOCX attachment files. When handling the "Relationship Id" field within such a file, the process copies the contents into a static buffer on the stack. By supplying a large enough value this buffer can be overflowed leading to arbitrary code execution under the context of the user running the mail client.

Vendor Response

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

Disclosure Timeline

    2010-11-30 - Vulnerability reported to vendor
    2011-10-14 - Coordinated public release of advisory


This vulnerability was discovered by: