CVE-2011-4868: n/a vulnerability

CVE-2011-4868: The logging functionality in dhcpd in ISC DHCP before 4.2.3-P2, when using Dynamic DNS (DDNS) and issuing I...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 7, 2024, 00:16 UTC (UTC+00:00)

Security readout for executives and security teams

This flaw can crash ISC DHCP's dhcpd service in a specific IPv6 and Dynamic DNS setup. For affected networks, the business impact is loss of DHCP service availability, which can disrupt address assignment. The provided sources do not show data theft, code execution, or confirmed active exploitation. Exposure is most likely where ISC DHCP dhcpd before 4.2.3-P2 is used for DHCPv6 with Dynamic DNS enabled. Systems not using DDNS or not issuing IPv6 addresses appear outside the described trigger conditions. Treat this as a service-availability risk. Prioritize remediation for DHCP servers supporting critical office, datacenter, or production networks, especially if IPv6 and DDNS are enabled. Mitigation focus: Upgrade ISC DHCP to 4.2.3-P2 or later where applicable.; Use vendor or distribution advisories for supported replacement packages.; Identify and prioritize DHCPv6 servers with DDNS enabled..

Prepared: Jun 27, 2026, 17:28 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jan 15, 2012, 02:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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0CVSS vectors

0Timeline events

0ADP providers

4Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://kb.isc.org/article/AA-00705CVE reference · x_refsource_CONFIRM
https://www.isc.org/software/dhcp/advisories/cve-2011-4868CVE reference · x_refsource_CONFIRM
https://deepthought.isc.org/article/AA-00595CVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

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Weakness

CWE details

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