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CVE-2017-3144

Publication date 31 December 2017

Last updated 24 July 2024

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

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 4.3.5-3ubuntu5
20.10 groovy
Fixed 4.3.5-3ubuntu5
20.04 LTS focal
Fixed 4.3.5-3ubuntu5
19.10 eoan
Fixed 4.3.5-3ubuntu5
19.04 disco
Fixed 4.3.5-3ubuntu5
18.10 cosmic
Fixed 4.3.5-3ubuntu5
18.04 LTS bionic
Fixed 4.3.5-3ubuntu5
17.10 artful
Fixed 4.3.5-3ubuntu2.2
16.04 LTS xenial
Fixed 4.3.3-5ubuntu12.9
14.04 LTS trusty
Fixed 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

Parameter Value
Base score 7.5 · High
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact 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