Ethereal contains multiple vulnerabilities in the IGAP protocol dissector

Overview

Ethereal contains multiple buffer overflows in the Internet Group Membership Authentication Protocol (IGAP) protocol dissector. These vulnerabilities could allow a remote, unauthenticated attacker to execute arbitrary code.

Description

Ethereal is a network traffic analysis package. It includes the ability to decode packets containing IGAP data. There are two buffer overflow vulnerabilities in the way the IGAP protocol dissector decodes packets containing IGAP data. These vulnerabilities could be exploited by a remote, unauthenticated attacker by sending a specially crafted IGAP packet containing an overly long value for the accountname or message. Exploitation of these vulnerabilities could result in arbitrary code execution.

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Impact

A remote, unauthenticated attacker could execute arbitrary code on the vulnerable system.

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Solution

Upgrade

Upgrade to version 0.10.3 or later.

Note: Ethereal is considered BETA software at this time.

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Disable Dissector

If you are unable to upgrade to version 0.10.3 or later, you can disable the IGAP protocol dissector by performing the following actions in Ethereal:

1. Select Analyze->Enabled Protocols
2. Disable the IGAP protocol dissector from the list by unchecking its “Status” checkbox

However, it is strongly encouraged to upgrade to version 0.10.3 or later.

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Vendor Information

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Ethereal __ Affected

Updated: March 24, 2004

Status

Affected

Vendor Statement

Please see the Ethereal Security Bulletin at <http://www.ethereal.com/appnotes/enpa-sa-00013.html&gt;.

Vendor Information

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

Addendum

The CERT/CC has no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23864884 Feedback>).

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

• <http://security.e-matters.de/advisories/032004.html&gt;
• <http://www.ethereal.com/appnotes/enpa-sa-00013.html&gt;
• <http://secunia.com/advisories/11185/&gt;

Acknowledgements

Ethereal credits Stefan Esser for reporting these vulnerabilities.

This document was written by Damon Morda.

Other Information

CVE IDs:	CVE-2004-0176
Severity Metric:	9.82 Date Public: