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CVE-2012-3955

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...

7.1 HighFix available

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.

Exploit likelihood

21.7%Down 1.9 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 7.1

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.

Record
CVE-2012-3955
CVSS 2.0
7.1 HighAV:N/AC:M/Au:N/C:N/I:N/A:C
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2012-3955
Updated
2026-11-02
EUVDEUVD-2012-3899 No score

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.

Record
EUVD-2012-3899
Updated
2026-11-03
GitHub AdvisoriesGHSA-6xcv-87wr-7rfm No score

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...

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.

Record
GHSA-6xcv-87wr-7rfm
Updated
2026-11-02
OSV No score

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.

Record
CVE-2012-3955
Updated
2026-11-02
OSVDEBIAN-CVE-2012-3955 No score

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.

Record
DEBIAN-CVE-2012-3955
Updated
2026-11-02
OSVopenSUSE-SU-2024:10358-1 No score

dhcp-4.3.3.P1-3.1 on GA media

These are all security issues fixed in the dhcp-4.3.3.P1-3.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:10358-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
isc-dhcp
Debian:12
 before 4.2.4-2
4.2.4-2
isc-dhcp
Debian:13
 before 4.2.4-2
4.2.4-2
isc-dhcp
Debian:6.0
 before 4.1.1-P1-15+squeeze8, plus listed versions
4.1.1-P1-154.1.1-P1-15+squeeze14.1.1-P1-15+squeeze24.1.1-P1-15+squeeze34.1.1-P1-15+squeeze44.1.1-P1-15+squeeze54.1.1-P1-15+squeeze6
4.1.1-P1-15+squeeze8
dhcp
Red Hat:enterprise_linux:6::client
 before 12:4.1.1-34.P1.el6
12:4.1.1-34.P1.el6
dhcp-debuginfo
Red Hat:enterprise_linux:6::client
 before 12:4.1.1-34.P1.el6
12:4.1.1-34.P1.el6
dhcp-devel
Red Hat:enterprise_linux:6::client
 before 12:4.1.1-34.P1.el6
12:4.1.1-34.P1.el6
dhclient
Red Hat:enterprise_linux:6::client
 before 12:4.1.1-34.P1.el6
12:4.1.1-34.P1.el6
dhcp-common
Red Hat:enterprise_linux:6::client
 before 12:4.1.1-34.P1.el6
12:4.1.1-34.P1.el6
dhcp
Red Hat:enterprise_linux:6::computenode
 before 12:4.1.1-34.P1.el6
12:4.1.1-34.P1.el6
dhcp-debuginfo
Red Hat:enterprise_linux:6::computenode
 before 12:4.1.1-34.P1.el6
12:4.1.1-34.P1.el6
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Affected packages
PackageAffectedFixed
dhcp-devel
Red Hat:enterprise_linux:6::computenode
 before 12:4.1.1-34.P1.el6
12:4.1.1-34.P1.el6
dhclient
Red Hat:enterprise_linux:6::computenode
 before 12:4.1.1-34.P1.el6
12:4.1.1-34.P1.el6
dhcp-common
Red Hat:enterprise_linux:6::computenode
 before 12:4.1.1-34.P1.el6
12:4.1.1-34.P1.el6
dhcp
Red Hat:enterprise_linux:6::server
 before 12:4.1.1-34.P1.el6
12:4.1.1-34.P1.el6
dhcp-debuginfo
Red Hat:enterprise_linux:6::server
 before 12:4.1.1-34.P1.el6
12:4.1.1-34.P1.el6
dhcp-devel
Red Hat:enterprise_linux:6::server
 before 12:4.1.1-34.P1.el6
12:4.1.1-34.P1.el6
dhclient
Red Hat:enterprise_linux:6::server
 before 12:4.1.1-34.P1.el6
12:4.1.1-34.P1.el6
dhcp-common
Red Hat:enterprise_linux:6::server
 before 12:4.1.1-34.P1.el6
12:4.1.1-34.P1.el6
dhcp
Red Hat:enterprise_linux:6::workstation
 before 12:4.1.1-34.P1.el6
12:4.1.1-34.P1.el6
dhcp-debuginfo
Red Hat:enterprise_linux:6::workstation
 before 12:4.1.1-34.P1.el6
12:4.1.1-34.P1.el6
dhcp-devel
Red Hat:enterprise_linux:6::workstation
 before 12:4.1.1-34.P1.el6
12:4.1.1-34.P1.el6
dhclient
Red Hat:enterprise_linux:6::workstation
 before 12:4.1.1-34.P1.el6
12:4.1.1-34.P1.el6
dhcp-common
Red Hat:enterprise_linux:6::workstation
 before 12:4.1.1-34.P1.el6
12:4.1.1-34.P1.el6
dhcp
openSUSE:Tumbleweed
 before 4.3.3.P1-3.1
4.3.3.P1-3.1

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2012-3955 is a high vulnerability (CVSS 7.1) in Isc Dhcp, published September 14, 2012. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 21.7%, the 97th percentile. Fixed in isc-dhcp 4.2.4-2.

References

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