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Cisco IOS IPv6 denial-of-service vulnerability

Vulnerability Note VU#472582

Original Release Date: 2005-01-26 | Last Revised: 2005-02-01

Overview

A vulnerability in the way Cisco IOS handles IPv6 packets could result in a remotely exploitable denial of service.

Description

The Cisco Internetwork Operating System (IOS) includes support for processing Internet Protocol version 6 (IPv6) packets. A vulnerability in the way that IOS handles a sequence of specially crafted IPv6 packets could cause an affected device to reload (reboot), resulting in a denial of service. The specific nature of the crafted packets exploiting this vulnerability is not known. Only devices running IOS that have IPv6-configured interfaces, either physical or logical (e.g., tunnels), are vulnerable to this issue.

Impact

A remote attacker may be able to cause an affected device to reload, thereby creating a denial of service condition.

Solution

Upgrade

Cisco has addressed this issue in new versions of the IOS software. Please see Cisco's Security Advisory for more details.

Vendor Information

472582
 

CVSS Metrics

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References

Acknowledgements

Thanks to Cisco PSIRT for reporting this vulnerability.

This document was written by Chad R Dougherty.

Other Information

CVE IDs: None
Severity Metric: 10.61
Date Public: 2005-01-26
Date First Published: 2005-01-26
Date Last Updated: 2005-02-01 20:50 UTC
Document Revision: 11

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