CVE-2012-3955

7.1 HIGH 22% exploit odds Fix listed Denial of service Network gear

What it is

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.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of service disruption.
Exploit odds: 21.7% chance of exploitation in the next 30 days (EPSS). Higher than most.
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2012-09-14 10:33 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 23:44 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 21.7% in the next 30 days (EPSS).
Severity: 7.1 HIGH (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2012-09-14 10:33 UTC
Last modified: 2026-06-16 23:44 UTC
Exploit probability: 21.7% · EPSS, next 30 days
Record status: Modified

Affected

Isc Dhcp 4.1-esv
Isc Dhcp 4.1.0
Isc Dhcp 4.1.1
Isc Dhcp 4.1.2
Debian Linux 6.0
Debian Linux 7.0
Canonical Ubuntu Linux 10.04
Canonical Ubuntu Linux 11.04

Attack profile CVSS 2.0 · 7.1

Attack vector: Network
Complexity: Medium
Authentication: None
Confidentiality: None
Integrity: None
Availability: Complete

Raw vector

AV:N/AC:M/Au:N/C:N/I:N/A:C

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2012-3955.md and follow it. Check whether this project is affected by CVE-2012-3955. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

· More options · Status badge

Download Square Reddit

Fix and advisories

References

NVD record · CVE.org record