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: 3395 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lack important information, be out of date, or contain factual errors.
© 2001-2016 Internet Systems ConsortiumPlease help us to improve the content of our knowledge base by letting us know below how we can improve this article. If you have a technical question or problem on which you'd like help, please don't submit it here as article feedback. For assistance with problems and questions for which you have not been able to find an answer in our Knowledge Base, we recommend searching our community mailing list archives and/or posting your question there (you will need to register there first for your posts to be accepted). The bind-users and the dhcp-users lists particularly have a long-standing and active membership.ISC relies on the financial support of the community to fund the development of its open source software products. If you would like to support future product evolution and maintenance as well having peace of mind knowing that our team of experts are poised to provide you with individual technical assistance whenever you call upon them, then please consider our Professional Subscription Support services - details can be found on our main website.