CVE-2011-4868

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.

Published: 2012-01-15 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-4868 is rated Moderate Risk (50.2/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.85%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2011-4868

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-09-15 0.93% 0.85% -0.09%
2 2025-03-30 1.22% 0.93% -0.29%
3 2025-03-29 — 1.22% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-4868

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.1 2.0 MEDIUM
AV:A/AC:L/Au:N/C:N/I:N/A:C Click to expand
Access vector (AV:A)
Requires access to an adjacent network segment.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 6.5 6.9 [email protected]

Weakness enumeration for CVE-2011-4868

OS Trackers for CVE-2011-4868

vendor priority summary link
debian low CVE-2011-4868 low priority: Debian including 1 source packages (isc-dhcp), 4 status rows across 4 suites (bookworm, bullseye, sid, trixie): resolved 4. https://security-tracker.debian.org/tracker/CVE-2011-4868
gentoo normal CVE-2011-4868: 1 GLSA(s) (201301-06), 1 atom(s) (net-misc/dhcp); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2011-4868
redhat medium — https://access.redhat.com/security/cve/CVE-2011-4868
suse medium CVE-2011-4868 severity moderate: SUSE including 56 source package names (dhcp-4.2.3.P2-0.7.2, dhcp-4.2.4.P2-0.16.15, …), 88 product×package rows across 33 product lines (SUSE Linux Enterprise Desktop 12, SUSE Linux Enterprise Desktop 12 SP1, … (33 product lines)): Fixed 88. https://www.suse.com/security/cve/CVE-2011-4868/
ubuntu low CVE-2011-4868 low priority: Ubuntu including 1 source packages (isc-dhcp), 7 status rows across 7 suites (hardy, lucid, maverick, natty, oneiric, precise, upstream): DNE 3, not-affected 3, needs-triage 1. https://ubuntu.com/security/CVE-2011-4868

Affected software / configurations for CVE-2011-4868

Vendor Product Version Raw CPE
isc dhcp <= 4.2.3 cpe:2.3:a:isc:dhcp:*:p1:*:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:*:*:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:beta2:patchlevel1:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:beta2:patchlevel10:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:beta2:patchlevel11:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:beta2:patchlevel12:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:beta2:patchlevel13:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:beta2:patchlevel14:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:beta2:patchlevel15:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:beta2:patchlevel16:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:beta2:patchlevel18:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:beta2:patchlevel19:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:beta2:patchlevel2:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:beta2:patchlevel20:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:beta2:patchlevel21:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:beta2:patchlevel22:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:beta2:patchlevel23:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:beta2:patchlevel24:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:beta2:patchlevel3:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:beta2:patchlevel4:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:beta2:patchlevel5:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:beta2:patchlevel6:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:beta2:patchlevel7:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:beta2:patchlevel8:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:beta2:patchlevel9:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:rc1:*:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:rc1:patchlevel1:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:rc10:*:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:rc11:*:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:rc12:*:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:rc2:*:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:rc2:patchlevel1:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:rc3:*:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:rc4:*:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:rc5:*:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:rc6:*:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:rc7:*:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:rc8:*:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:rc8:patchlevel1:*:*:*:*:*
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:rc9:*:*:*:*:*:*
isc dhcp 3.0.1 cpe:2.3:a:isc:dhcp:3.0.1:*:*:*:*:*:*:*
isc dhcp 3.0.1 cpe:2.3:a:isc:dhcp:3.0.1:rc1:*:*:*:*:*:*
isc dhcp 3.0.1 cpe:2.3:a:isc:dhcp:3.0.1:rc10:*:*:*:*:*:*
isc dhcp 3.0.1 cpe:2.3:a:isc:dhcp:3.0.1:rc11:*:*:*:*:*:*
isc dhcp 3.0.1 cpe:2.3:a:isc:dhcp:3.0.1:rc12:*:*:*:*:*:*
isc dhcp 3.0.1 cpe:2.3:a:isc:dhcp:3.0.1:rc13:*:*:*:*:*:*
isc dhcp 3.0.1 cpe:2.3:a:isc:dhcp:3.0.1:rc14:*:*:*:*:*:*
isc dhcp 3.0.1 cpe:2.3:a:isc:dhcp:3.0.1:rc2:*:*:*:*:*:*
isc dhcp 3.0.1 cpe:2.3:a:isc:dhcp:3.0.1:rc3:*:*:*:*:*:*
isc dhcp 3.0.1 cpe:2.3:a:isc:dhcp:3.0.1:rc4:*:*:*:*:*:*
isc dhcp 3.0.1 cpe:2.3:a:isc:dhcp:3.0.1:rc5:*:*:*:*:*:*
isc dhcp 3.0.1 cpe:2.3:a:isc:dhcp:3.0.1:rc6:*:*:*:*:*:*
isc dhcp 3.0.1 cpe:2.3:a:isc:dhcp:3.0.1:rc7:*:*:*:*:*:*
isc dhcp 3.0.1 cpe:2.3:a:isc:dhcp:3.0.1:rc8:*:*:*:*:*:*
isc dhcp 3.0.1 cpe:2.3:a:isc:dhcp:3.0.1:rc9:*:*:*:*:*:*
isc dhcp 3.0.2 cpe:2.3:a:isc:dhcp:3.0.2:*:*:*:*:*:*:*
isc dhcp 3.0.2 cpe:2.3:a:isc:dhcp:3.0.2:b1:*:*:*:*:*:*
isc dhcp 3.0.2 cpe:2.3:a:isc:dhcp:3.0.2:rc1:*:*:*:*:*:*
isc dhcp 3.0.2 cpe:2.3:a:isc:dhcp:3.0.2:rc2:*:*:*:*:*:*
isc dhcp 3.0.2 cpe:2.3:a:isc:dhcp:3.0.2:rc3:*:*:*:*:*:*
isc dhcp 3.0.3 cpe:2.3:a:isc:dhcp:3.0.3:*:*:*:*:*:*:*
isc dhcp 3.0.3 cpe:2.3:a:isc:dhcp:3.0.3:b1:*:*:*:*:*:*
isc dhcp 3.0.3 cpe:2.3:a:isc:dhcp:3.0.3:b2:*:*:*:*:*:*
isc dhcp 3.0.3 cpe:2.3:a:isc:dhcp:3.0.3:b3:*:*:*:*:*:*
isc dhcp 3.0.4 cpe:2.3:a:isc:dhcp:3.0.4:*:*:*:*:*:*:*
isc dhcp 3.0.4 cpe:2.3:a:isc:dhcp:3.0.4:b1:*:*:*:*:*:*
isc dhcp 3.0.4 cpe:2.3:a:isc:dhcp:3.0.4:b2:*:*:*:*:*:*
isc dhcp 3.0.4 cpe:2.3:a:isc:dhcp:3.0.4:b3:*:*:*:*:*:*
isc dhcp 3.0.4 cpe:2.3:a:isc:dhcp:3.0.4:rc1:*:*:*:*:*:*
isc dhcp 3.0.5 cpe:2.3:a:isc:dhcp:3.0.5:*:*:*:*:*:*:*
isc dhcp 3.0.5 cpe:2.3:a:isc:dhcp:3.0.5:rc1:*:*:*:*:*:*
isc dhcp 3.0.6 cpe:2.3:a:isc:dhcp:3.0.6:rc1:*:*:*:*:*:*
isc dhcp 3.1.0 cpe:2.3:a:isc:dhcp:3.1.0:*:*:*:*:*:*:*
isc dhcp 3.1.0 cpe:2.3:a:isc:dhcp:3.1.0:a1:*:*:*:*:*:*
isc dhcp 3.1.0 cpe:2.3:a:isc:dhcp:3.1.0:a2:*:*:*:*:*:*
isc dhcp 3.1.0 cpe:2.3:a:isc:dhcp:3.1.0:a3:*:*:*:*:*:*
isc dhcp 3.1.0 cpe:2.3:a:isc:dhcp:3.1.0:b1:*:*:*:*:*:*
isc dhcp 3.1.0 cpe:2.3:a:isc:dhcp:3.1.0:b2:*:*:*:*:*:*
isc dhcp 4.0.0 cpe:2.3:a:isc:dhcp:4.0.0:*:*:*:*:*:*:*
isc dhcp 4.0.0 cpe:2.3:a:isc:dhcp:4.0.0:a1:*:*:*:*:*:*

References for CVE-2011-4868

cvelogic Threat Intelligence