CVE-2012-3954

Multiple memory leaks in ISC DHCP 4.1.x and 4.2.x before 4.2.4-P1 and 4.1-ESV before 4.1-ESV-R6 allow remote attackers to cause a denial of service (memory consumption) by sending many requests.

Published: 2012-07-25 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2012-3954 is rated Moderate Risk (42.9/100): CVSS Low severity, with medium exploitation likelihood (EPSS 4.46%). 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-2012-3954

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 2026-05-02 5.91% 4.46% -1.45%
2 2026-03-26 6.48% 5.91% -0.57%
3 2026-03-11 — 6.48% —

Full EPSS history (17 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2012-3954

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
3.3 2.0 LOW
AV:A/AC:L/Au:N/C:N/I:N/A:P 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:P)
Partial availability impact.
 6.5 2.9 [email protected]

Weakness enumeration for CVE-2012-3954

OS Trackers for CVE-2012-3954

vendor priority summary link
debian not yet assigned CVE-2012-3954 not yet assigned 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-2012-3954
gentoo normal CVE-2012-3954: 1 GLSA(s) (201301-06), 1 atom(s) (net-misc/dhcp); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2012-3954
redhat medium — https://access.redhat.com/security/cve/CVE-2012-3954
suse low CVE-2012-3954 severity low: SUSE including 61 source package names (dhcp-3.1.3.ESV-0.17.1, dhcp-4.2.4.P1-0.5.1, …), 99 product×package rows across 37 product lines (SUSE Linux Enterprise Desktop 11 SP2, SUSE Linux Enterprise Desktop 12, … (37 product lines)): Fixed 99. https://www.suse.com/security/cve/CVE-2012-3954/
ubuntu medium CVE-2012-3954 medium priority: Ubuntu including 2 source packages (dhcp3, isc-dhcp), 12 status rows across 6 suites (hardy, lucid, natty, oneiric, precise, upstream): DNE 5, released 3, needs-triage 2, not-affected 2. https://ubuntu.com/security/CVE-2012-3954

Affected software / configurations for CVE-2012-3954

Vendor Product Version Raw CPE
isc dhcp 4.1.0 cpe:2.3:a:isc:dhcp:4.1.0:-:*:*:*:*:*:*
isc dhcp 4.1.0 cpe:2.3:a:isc:dhcp:4.1.0:a1:*:*:*:*:*:*
isc dhcp 4.1.0 cpe:2.3:a:isc:dhcp:4.1.0:a2:*:*:*:*:*:*
isc dhcp 4.1.0 cpe:2.3:a:isc:dhcp:4.1.0:b1:*:*:*:*:*:*
isc dhcp 4.1.1 cpe:2.3:a:isc:dhcp:4.1.1:-:*:*:*:*:*:*
isc dhcp 4.1.1 cpe:2.3:a:isc:dhcp:4.1.1:b1:*:*:*:*:*:*
isc dhcp 4.1.1 cpe:2.3:a:isc:dhcp:4.1.1:b2:*:*:*:*:*:*
isc dhcp 4.1.1 cpe:2.3:a:isc:dhcp:4.1.1:b3:*:*:*:*:*:*
isc dhcp 4.1.1 cpe:2.3:a:isc:dhcp:4.1.1:rc1:*:*:*:*:*:*
isc dhcp 4.1.2 cpe:2.3:a:isc:dhcp:4.1.2:-:*:*:*:*:*:*
isc dhcp 4.1.2 cpe:2.3:a:isc:dhcp:4.1.2:b1:*:*:*:*:*:*
isc dhcp 4.1.2 cpe:2.3:a:isc:dhcp:4.1.2:p1:*:*:*:*:*:*
isc dhcp 4.1.2 cpe:2.3:a:isc:dhcp:4.1.2:rc1:*:*:*:*:*:*
isc dhcp 4.2.0 cpe:2.3:a:isc:dhcp:4.2.0:-:*:*:*:*:*:*
isc dhcp 4.2.0 cpe:2.3:a:isc:dhcp:4.2.0:a1:*:*:*:*:*:*
isc dhcp 4.2.0 cpe:2.3:a:isc:dhcp:4.2.0:a2:*:*:*:*:*:*
isc dhcp 4.2.0 cpe:2.3:a:isc:dhcp:4.2.0:b1:*:*:*:*:*:*
isc dhcp 4.2.0 cpe:2.3:a:isc:dhcp:4.2.0:b2:*:*:*:*:*:*
isc dhcp 4.2.0 cpe:2.3:a:isc:dhcp:4.2.0:p1:*:*:*:*:*:*
isc dhcp 4.2.0 cpe:2.3:a:isc:dhcp:4.2.0:rc1:*:*:*:*:*:*
isc dhcp 4.2.1 cpe:2.3:a:isc:dhcp:4.2.1:-:*:*:*:*:*:*
isc dhcp 4.2.1 cpe:2.3:a:isc:dhcp:4.2.1:b1:*:*:*:*:*:*
isc dhcp 4.2.1 cpe:2.3:a:isc:dhcp:4.2.1:rc1:*:*:*:*:*:*
isc dhcp 4.2.2 cpe:2.3:a:isc:dhcp:4.2.2:-:*:*:*:*:*:*
isc dhcp 4.2.2 cpe:2.3:a:isc:dhcp:4.2.2:b1:*:*:*:*:*:*
isc dhcp 4.2.2 cpe:2.3:a:isc:dhcp:4.2.2:rc1:*:*:*:*:*:*
isc dhcp 4.2.3 cpe:2.3:a:isc:dhcp:4.2.3:-:*:*:*:*:*:*
isc dhcp 4.2.3 cpe:2.3:a:isc:dhcp:4.2.3:p1:*:*:*:*:*:*
isc dhcp 4.2.3 cpe:2.3:a:isc:dhcp:4.2.3:p2:*:*:*:*:*:*
isc dhcp 4.2.4 cpe:2.3:a:isc:dhcp:4.2.4:*:*:*:*:*:*:*
isc dhcp 4.1-esv cpe:2.3:a:isc:dhcp:4.1-esv:-:*:*:*:*:*:*
isc dhcp 4.1-esv cpe:2.3:a:isc:dhcp:4.1-esv:r1:*:*:*:*:*:*
isc dhcp 4.1-esv cpe:2.3:a:isc:dhcp:4.1-esv:r2:*:*:*:*:*:*
isc dhcp 4.1-esv cpe:2.3:a:isc:dhcp:4.1-esv:r3:*:*:*:*:*:*
isc dhcp 4.1-esv cpe:2.3:a:isc:dhcp:4.1-esv:r3_b1:*:*:*:*:*:*
isc dhcp 4.1-esv cpe:2.3:a:isc:dhcp:4.1-esv:r4:*:*:*:*:*:*
isc dhcp 4.1-esv cpe:2.3:a:isc:dhcp:4.1-esv:r5:*:*:*:*:*:*
isc dhcp 4.1-esv cpe:2.3:a:isc:dhcp:4.1-esv:r5_b1:*:*:*:*:*:*
isc dhcp 4.1-esv cpe:2.3:a:isc:dhcp:4.1-esv:r5_rc1:*:*:*:*:*:*
isc dhcp 4.1-esv cpe:2.3:a:isc:dhcp:4.1-esv:r5_rc2:*:*:*:*:*:*
isc dhcp 4.1-esv cpe:2.3:a:isc:dhcp:4.1-esv:rc1:*:*:*:*:*:*
debian debian_linux 6.0 cpe:2.3:o:debian:debian_linux:6.0:*:*:*:*:*:*:*
debian debian_linux 7.0 cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
canonical ubuntu_linux 11.04 cpe:2.3:o:canonical:ubuntu_linux:11.04:*:*:*:*:*:*:*
canonical ubuntu_linux 11.10 cpe:2.3:o:canonical:ubuntu_linux:11.10:*:*:*:*:*:*:*
canonical ubuntu_linux 12.04 cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*

References for CVE-2012-3954

URL Tags
http://lists.opensuse.org/opensuse-updates/2012-08/msg00030.html Mailing List Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2012-1141.html Third Party Advisory
http://security.gentoo.org/glsa/glsa-201301-06.xml Third Party Advisory
http://www.debian.org/security/2012/dsa-2516 Third Party Advisory
http://www.debian.org/security/2012/dsa-2519 Third Party Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2012:115 Third Party Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2012:116 Third Party Advisory
http://www.securityfocus.com/bid/54665 Third Party Advisory VDB Entry
http://www.securitytracker.com/id?1027300 Third Party Advisory VDB Entry
http://www.ubuntu.com/usn/USN-1519-1 Third Party Advisory
https://kb.isc.org/article/AA-00737 Vendor Advisory
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