CVE-2012-3955

Name: CVE-2012-3955
Creator: NVD / NIST
Published: 2012-09-14T10:33:21.307+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 21.65%

Last modified Jun 16, 2026

CVE-2012-3955 is a vulnerability of currently unknown severity. ISC DHCP 4.1.x before 4.1-ESV-R7 and 4.2.x before 4.2.4-P2 allows remote attackers to cause a denial of service (daemon crash) in opportunistic circumstances by establishing an IPv6 lease in an environment where the lease expiration time is later reduced.. EPSS estimates a 21.65% chance of exploitation in the next 30 days.

Description

ISC DHCP 4.1.x before 4.1-ESV-R7 and 4.2.x before 4.2.4-P2 allows remote attackers to cause a denial of service (daemon crash) in opportunistic circumstances by establishing an IPv6 lease in an environment where the lease expiration time is later reduced.

Metrics

EPSS Probability

21.65%

97.3th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Isc	Dhcp	4.1-esv
Isc	Dhcp	4.1.0
Isc	Dhcp	4.1.1
Isc	Dhcp	4.1.2
Debian	Debian Linux	6.0
Debian	Debian Linux	7.0
Canonical	Ubuntu Linux	10.04
Canonical	Ubuntu Linux	11.04
Canonical	Ubuntu Linux	11.10
Canonical	Ubuntu Linux	12.04

References

http://lists.fedoraproject.org/pipermail/package-announce/2012-October/088882.htmlThird Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2012-September/086992.htmlThird Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2012-September/088220.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-updates/2012-09/msg00088.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-updates/2012-09/msg00103.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-updates/2012-09/msg00105.htmlMailing List, Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2013-0504.htmlThird Party Advisory
http://secunia.com/advisories/51318Third Party Advisory
http://security.gentoo.org/glsa/glsa-201301-06.xmlThird Party Advisory
http://www.debian.org/security/2012/dsa-2551Third Party Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2012:153Third Party Advisory
http://www.securityfocus.com/bid/55530Third Party Advisory, VDB Entry
http://www.securitytracker.com/id?1027528Third Party Advisory, VDB Entry
http://www.ubuntu.com/usn/USN-1571-1Third Party Advisory
https://blogs.oracle.com/sunsecurity/entry/cve_2012_3955_denial_ofThird Party Advisory
https://kb.isc.org/article/AA-00779Vendor Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2012-October/088882.htmlThird Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2012-September/086992.htmlThird Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2012-September/088220.htmlThird Party Advisory
http://lists.opensuse.org/opensuse-updates/2012-09/msg00088.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-updates/2012-09/msg00103.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-updates/2012-09/msg00105.htmlMailing List, Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2013-0504.htmlThird Party Advisory
http://secunia.com/advisories/51318Third Party Advisory
http://security.gentoo.org/glsa/glsa-201301-06.xmlThird Party Advisory
http://www.debian.org/security/2012/dsa-2551Third Party Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2012:153Third Party Advisory
http://www.securityfocus.com/bid/55530Third Party Advisory, VDB Entry
http://www.securitytracker.com/id?1027528Third Party Advisory, VDB Entry
http://www.ubuntu.com/usn/USN-1571-1Third Party Advisory
https://blogs.oracle.com/sunsecurity/entry/cve_2012_3955_denial_ofThird Party Advisory
https://kb.isc.org/article/AA-00779Vendor Advisory

Timeline

Published: Sep 14, 2012
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2012-3955?

How severe is CVE-2012-3955?

Severity scoring for CVE-2012-3955 is pending analysis. The EPSS model estimates a 21.65% probability of exploitation in the next 30 days.

How do I fix CVE-2012-3955?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2012-3955?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST