CVE-2017-3144

Publication date 31 December 2017

Last updated 25 August 2025

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

Description

A vulnerability stemming from failure to properly clean up closed OMAPI connections can lead to exhaustion of the pool of socket descriptors available to the DHCP server. Affects ISC DHCP 4.1.0 to 4.1-ESV-R15, 4.2.0 to 4.2.8, 4.3.0 to 4.3.6. Older versions may also be affected but are well beyond their end-of-life (EOL). Releases prior to 4.1.0 have not been tested.

Read the notes from the security team

Status

Package Ubuntu Release Status
isc-dhcp 21.04 hirsute
Fixed in 4.3.5-3ubuntu5
20.10 groovy
Fixed in 4.3.5-3ubuntu5
20.04 LTS focal
Fixed in 4.3.5-3ubuntu5
19.10 eoan
Fixed in 4.3.5-3ubuntu5
19.04 disco
Fixed in 4.3.5-3ubuntu5
18.10 cosmic
Fixed in 4.3.5-3ubuntu5
18.04 LTS bionic
Fixed in 4.3.5-3ubuntu5
17.10 artful
Fixed in 4.3.5-3ubuntu2.2
16.04 LTS xenial
Fixed in 4.3.3-5ubuntu12.9
14.04 LTS trusty
Fixed in 4.2.4-7ubuntu12.12

Notes

mdeslaur

DoS over OMAPI port only, see ISC kb article for workarounds, or properly limit access to ports

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
isc-dhcp

Severity score breakdown

CVSS version: CVSS v3.0

Base score 7.5 · High

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

Other references

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