CVE-2011-4868

Severity: medium (CVSS 6.1 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2012-01-15 · updated 2026-06-16
Weakness: CWE-399

Description

The logging functionality in dhcpd in ISC DHCP before 4.2.3-P2, when using Dynamic DNS (DDNS) and issuing IPv6 addresses, does not properly handle the DHCPv6 lease structure, which allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via crafted packets related to a lease-status update.

Affected products

ISC DHCP: through 4.2.3; 3.0, 3.0-beta2, 3.0-rc1, 3.0-rc10, 3.0-rc11, 3.0-rc12 (+70)

References

http://security.gentoo.org/glsa/glsa-201301-06.xml
https://deepthought.isc.org/article/AA-00595
https://kb.isc.org/article/AA-00705
https://www.isc.org/software/dhcp/advisories/cve-2011-4868
http://security.gentoo.org/glsa/glsa-201301-06.xml
https://deepthought.isc.org/article/AA-00595
https://kb.isc.org/article/AA-00705
https://www.isc.org/software/dhcp/advisories/cve-2011-4868

Get alerted when CVE-2011-4868 or the next vulnerability affects your stack