CVE-2011-4868: An Error in DDNS Processing of DHCPv6 Leases Can Cause a Crash in ISC dhcpd
| Author: Cathy Almond Reference Number: AA-00705 Views: 865 Created: 2012-06-08 14:30 Last Updated: 2012-06-08 14:30
0 Rating/ Voters
handling of Dynamic DNS information associated with DHCPv6 leases can
cause a segmentation fault in ISC DHCP servers using IPv6 and Dynamic
DNS, resulting in denial of service to clients.
Posting date: 12 Jan 2012
4.2.2, 4.2.3, 4.2.3-P1
Due to improper handling of a DHCPv6 lease
structure, ISC DHCP servers that are serving IPv6 address pools AND
using Dynamic DNS can encounter a segmentation fault error while
updating lease status under certain conditions. The potential exists for
this condition to be intentionally triggered, resulting in effective
denial of service to clients expecting service from the affected server.
Users of affected versions who use DHCPv6 and Dynamic DNS should
upgrade to version 4.2.3-P2.
CVSS Score: 6.1
For more information on the Common Vulnerability Scoring System and to obtain your specific environmental score please visit:
No known workarounds, please upgrade if you are running an affected version of ISC DHCP and you use Dynamic DNS and IPv6.
None known at this time.
Upgrade to ISC DHCP 4.2.3-P2
Document Revision History:
1.0 05 January 2012 - Phase I notified
1.1 11 January 2012 - Phase II & III notified
1.2 12 January 2012 - Public Release
Internet Systems Consortium (ISC) is providing
this notice on an "AS IS" basis. No warranty or guarantee of any kind is
expressed in this notice and none should be implied. ISC expressly
excludes and disclaims any warranties regarding this notice or materials
referred to in this notice, including, without limitation, any implied
warranty of merchantability, fitness for a particular purpose, absence
of hidden defects, or of non-infringement. Your use or reliance on this
notice or materials referred to in this notice is at your own risk. ISC
may change this notice at any time.
A stand-alone copy or paraphrase of the text of this document that
omits the document URL is an uncontrolled copy. Uncontrolled copies may
lack important information, be out of date, or contain factual errors.
© 2001-2014 Internet Systems Consortium