CVE-2011-4868

6.1 MEDIUM 3% exploit odds Fix listed

What it is

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.

At a glance

Exploitability: Can be exploited from the same network segment without logging in. High risk of service disruption.
Exploit odds: 3.4% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2012-01-15 03:55 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 23:35 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 3.4% in the next 30 days (EPSS).
Severity: 6.1 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2012-01-15 03:55 UTC
Last modified: 2026-06-16 23:35 UTC
Exploit probability: 3.4% · EPSS, next 30 days
Weakness: CWE-399
Record status: Modified

Affected

Isc Dhcp ≤ 4.2.3
Isc Dhcp 3.0
Isc Dhcp 3.0.1
Isc Dhcp 3.0.2
Isc Dhcp 3.0.3
Isc Dhcp 3.0.4
Isc Dhcp 3.0.5
Isc Dhcp 3.0.6

Attack profile CVSS 2.0 · 6.1

Attack vector: Adjacent network
Complexity: Low
Authentication: None
Confidentiality: None
Integrity: None
Availability: Complete

Raw vector

AV:A/AC:L/Au:N/C:N/I:N/A:C

Is it in your code?

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Fix and advisories

References

NVD record · CVE.org record