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CVE-2019-6474

Published: 28 August 2019

A missing check on incoming client requests can be exploited to cause a situation where the Kea server's lease storage contains leases which are rejected as invalid when the server tries to load leases from storage on restart. If the number of such leases exceeds a hard-coded limit in the Kea code, a server trying to restart will conclude that there is a problem with its lease store and give up. Versions affected: 1.4.0 to 1.5.0, 1.6.0-beta1, and 1.6.0-beta2

Notes

AuthorNote
alexmurray
This only affects servers which are using memfile for lease
storage.

Priority

Medium

Cvss 3 Severity Score

6.5

Score breakdown

Status

Package Release Status
isc-kea
Launchpad, Ubuntu, Debian
bionic Needs triage

disco Ignored
(end of life)
eoan Ignored
(end of life)
focal Not vulnerable
(1.6.2-0ubuntu1)
groovy Ignored
(end of life)
hirsute Ignored
(end of life)
impish Ignored
(end of life)
jammy Not vulnerable
(2.0.2-1)
kinetic Not vulnerable
(2.2.0-1)
lunar Not vulnerable
(2.2.0-5ubuntu4)
mantic Not vulnerable
(2.2.0-5ubuntu4)
noble Not vulnerable
(2.2.0-5ubuntu4)
trusty Does not exist

upstream Needs triage

xenial Needs triage

Severity score breakdown

Parameter Value
Base score 6.5
Attack vector Adjacent
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H