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: 981 Created: 2012-06-08 14:30 Last Updated: 2012-06-08 14:30
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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
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