TippingPoint Zero Day Initiative

Novell NetMail IMAP APPEND Buffer Overflow Vulnerability

ZDI-06-054: December 22nd, 2006


Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 3868. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Novell NetMail. Successful exploitation requires the attacker to successfully authenticate to the affected service.

The specific flaw exists in the NetMail IMAP server's handling of the APPEND command. A lack of bounds checking on a specific parameter to this command can lead to a stack-based buffer overflow. This vulnerability can be exploited to execute arbitrary code.

Vendor Response

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

Disclosure Timeline

    2006-08-14 - Vulnerability reported to vendor
    2006-12-22 - Coordinated public release of advisory


This vulnerability was discovered by: