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CVE-2018-5739

Published: 16 January 2019

An extension to hooks capabilities which debuted in Kea 1.4.0 introduced a memory leak for operators who are using certain hooks library facilities. In order to support multiple requests simultaneously, Kea 1.4 added a callout handle store but unfortunately the initial implementation of this store does not properly free memory in every case. Hooks which make use of query4 or query6 parameters in their callouts can leak memory, resulting in the eventual exhaustion of available memory and subsequent failure of the server process. Affects Kea DHCP 1.4.0.

Notes

AuthorNote
mdeslaur
introduced in 1.4.0, fixed in 1.4.0-P1

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
isc-kea
Launchpad, Ubuntu, Debian
impish Ignored
(end of life)
artful Ignored
(end of life)
bionic Not vulnerable
(code not present)
cosmic Ignored
(end of life)
disco Ignored
(end of life)
eoan Ignored
(end of life)
focal Not vulnerable

groovy Ignored
(end of life)
hirsute Ignored
(end of life)
jammy Not vulnerable

kinetic Not vulnerable

lunar Not vulnerable

trusty Does not exist

upstream Not vulnerable
(debian: Vulnerable code introduced in Kea 1.4.0)
xenial Not vulnerable
(code not present)

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H