Microsoft Windows TCP/IP fails to properly validate IGMP packets

Overview

Microsoft Windows implementations of the TCP/IP protocol fail to properly validate IGMP packets, leading to a denial-of-service condition.

Description

TCP and IGMP

The Transmission Control Protocol (TCP) is defined in RFC 793 as a means to provide reliable host-to-host transmission between hosts in a packet-switched computer network. The Internet Group Management Protocol version 3 (IGMPv3) is defined in RFC 3376 as a protocol to help manage multicast connections over the internet.

The Vulnerability

The Microsoft implementation of TCP/IP fails to properly handle specially crafted IGMPv3 packets, possibly leading to a denial-of-service condition. For more information, including a list of vulnerable systems, please refer to Microsoft Security Bulletin MS06-007.

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Impact

By sending a specially crafted IGMPv3 packet to a vulnerable system, an unauthenticated, remote attacker could cause that system to stop responding.

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Solution

Apply an Update

Microsoft has addressed this issue in Microsoft Security Bulletin MS06-007.

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Please see Microsoft Security Bulletin MS06-007 for a list of workarounds to mitigate this vulnerability.

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Vendor Information

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Updated: February 14, 2006

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

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

Addendum

Please see <http://www.microsoft.com/technet/security/Bulletin/MS06-007.mspx&gt;.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23839284 Feedback>).

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

• <http://www.microsoft.com/technet/security/bulletin/ms06-007.mspx&gt;
• <http://www.ietf.org/rfc/rfc3376.txt&gt;
• <http://www.ietf.org/rfc/rfc793.txt&gt;

Acknowledgements

This vulnerability was reported in Microsoft Security Bulletin MS06-007. Microsoft credits Douglas Nascimento of Datacom with providing information regarding this issue.

This document was written by Jeff Gennari.

Other Information

CVE IDs:	CVE-2006-0021
Severity Metric:	21.00 Date Public: