TippingPoint Zero Day Initiative

Novell NetMail NMAP STOR Buffer Overflow Vulnerability

ZDI-06-052: 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 3902. 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 NetMail's implementation of the Network Messaging Application Protocol (NMAP). The NMAP server lacks bounds checking on parameters supplied to the STOR command, which can lead to an exploitable buffer overflow. The vulnerable daemon, nmapd.exe, binds to TCP port 689.

Vendor Response

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

Disclosure Timeline

    2006-09-08 - Vulnerability reported to vendor
    2006-12-22 - Coordinated public release of advisory


This vulnerability was discovered by:
    Dennis Rand - CIRT.DK