Tamarack MMSd components fail to properly handle malformed packets

Overview

Tamarack MMSd components do not properly handle malformed RFC 1006 packets. This vulnerability may allow a remote, unauthenticated attacker to cause a denial of service condition.

Description

ISO Transport Service over TCP (TPKT, RFC 1006)

RFC 1006 specifies how to run the OSI transport protocol on top of TCP/IP. In the layered protocol model, RFC 1006 is situated between the TCP and OSI transport layers.

Tamarack MMSd

Tamarack MMSd is an implementation of the Manufacturing Message Specification (MMS, ISO 9506) protocol for small field devices.

The Problem

Tamarack MMSd components fail to properly handle malformed packets at the RFC 1006 layer. A remote, unauthenticated attacker may be able to exploit this vulnerability by sending a specially crafted packet to a server running a vulnerable version of Tamarack MMSd.

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Impact

A remote, unauthenticated attacker may be able to cause a denial of service condition on the device running Tamarack MMSd.

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Solution

Upgrade
This problem has been addressed in Tamarack MMSd version 7.992.

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Vendor Information

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Tamarak Consulting __ Affected

Notified: March 28, 2006 Updated: September 22, 2008

Status

Affected

Vendor Statement

Tamarack fixed the vulnerability as soon as we were made aware of it, and released the fix in V7.992. So far, we are not aware of anyone having experienced any difficulty regarding this vulnerability. We take all security issues seriously, and will work immediately to resolve them. It is recommended that IEC61850 products (and all substation networked devices) should be used in secure environments.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

<http://www.tamarack.com/overview.html&gt;

Acknowledgements

This vulnerability was reported by Matt Franz of DigitalBond.

This document was written by Jeff Gennari.

Other Information

CVE IDs:	CVE-2006-1178
Severity Metric:	2.52 Date Public: