Vulnerability Note VU#829422

Ethereal fails to properly handle malformed iSNS packets

Original Release date: 07 Sep 2004 | Last revised: 07 Sep 2004

Overview

Ethereal contains a vulnerability in the way it processes Internet Storage Name Service (iSNS) packets.

Description

The Internet Storage Name Service (iSNS) protocol is used to automate the discovery, management, and configuration of iSCSI and Fibre Channel devices in an IP network. Ethereal includes the ability to decode packets containing iSNS data. There is a vulnerability in the way the iSNS dissector decodes malformed iSNS packets. By sending a malformed iSNS packet or convincing a victim to read a malformed packet trace file, a remote, unauthenticated attacker could cause Ethereal to crash or potentially execute code of the attacker's choice.

Impact

A remote, unauthenticated attacker could cause Ethereal to crash or potentially execute code of the attacker's choice.

Solution

Upgrade

Upgrade to version 0.10.5 or later.

Note: Ethereal is considered BETA software at this time.


Disable iSNS protocol dissector

If you are unable to upgrade to version 0.10.5 or later, you can disable the iSNS protocol dissector by performing the following actions in Ethereal:


    1) Select Analyze->Enabled Protocols
    2) Disable the iSNS protocol dissector from the list by unchecking its "Status" checkbox

However, it is strongly encouraged to upgrade to version 0.10.5 or later.

Systems Affected (Learn More)

VendorStatusDate NotifiedDate Updated
EtherealAffected-07 Sep 2004
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

References

Credit

This vulnerability was reported by the maintainers of Ethereal.

This document was written by Damon Morda.

Other Information

  • CVE IDs: CAN-2004-0633
  • Date Public: 06 Jul 2004
  • Date First Published: 07 Sep 2004
  • Date Last Updated: 07 Sep 2004
  • Severity Metric: 8.09
  • Document Revision: 9

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