Vulnerability Note VU#686084

Overview

ISC DHCPv6 versions 4.0.x - 4.2.x are susceptible to a denial-of-service vulnerability.

Description

The ISC Advisory states: "When the DHCPv6 server code processes a message for an address that was previously declined and internally tagged as abandoned it can trigger an assert failure resulting in the server crashing. This could be used to crash DHCPv6 servers remotely. This issue only affects DHCPv6 servers. DHCPv4 servers are unaffected."

Impact

A remote attacker may cause a denial of service.

Solution

Upgrade Upgrade to 4.1.2-P1, 4.1-ESV-R1, or 4.2.1b1

Vendor Information (Learn More)

Vendor	Status	Date Notified	Date Updated
Internet Systems Consortium	Affected	24 Jan 2011	26 Jan 2011

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

• https://lists.isc.org/pipermail/isc-os-security/2011-January/000000.html
• http://www.isc.org/software/dhcp/advisories/cve-2011-0413

Credit

Thanks to Larissa Shapiro for reporting this vulnerability.

This document was written by Jared Allar.

Other Information

• CVE IDs: CVE-2011-0413
• Date Public: 26 Jan 2011
• Date First Published: 27 Jan 2011
• Date Last Updated: 28 Jan 2011
• Severity Metric: 0.95
• Document Revision: 10