Vulnerability Note VU#912505

Novell NetMail NMAP vulnerable to buffer overflow when processing "STOR" commands

Original Release date: 17 Jan 2007 | Last revised: 19 Jan 2007


A vulnerability in the way Novell NetMail handles NMAP "STOR" commands may cause a buffer overflow that may allow remote execution of arbitrary code.


Novell NetMail's implementation of the Network Messaging Application Protocol (NMAP) contains a buffer overflow that may occur when processing parameters supplied to the "STOR" command. An attacker must login to an affected system in order to take advantage of this vulnerability. The vulnerable daemon, nmapd.exe, binds to port 689/tcp.


A remote, authenticated attacker may be able to execute arbitrary code or cause a denial-of-service condition.



Novell has released an update to address this issue. See Novell document 3096026 for more details.

Block port 689/tcp

As a workaround, system administrators can use a firewall to block port 689/tcp at an appropriate network border, thus preventing external attackers from accessing the vulnerable nmapd.exe daemon. Note that this will not prevent an attack from within the local network.

Systems Affected (Learn More)

VendorStatusDate NotifiedDate Updated
Novell, Inc.Affected-15 Jan 2007
If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A N/A



This issue is addressed in Novell document 3096026 . Novell credits Dennis Rand of CIRT.DK working with TippingPoint and the Zero Day Initiative for reporting this issue.

This document was written by Chris Taschner.

Other Information

  • CVE IDs: CVE-2006-6424
  • Date Public: 23 Dec 2006
  • Date First Published: 17 Jan 2007
  • Date Last Updated: 19 Jan 2007
  • Severity Metric: 5.49
  • Document Revision: 12


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