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CVE-2022-41916

Published: 15 November 2022

Heimdal is an implementation of ASN.1/DER, PKIX, and Kerberos. Versions prior to 7.7.1 are vulnerable to a denial of service vulnerability in Heimdal's PKI certificate validation library, affecting the KDC (via PKINIT) and kinit (via PKINIT), as well as any third-party applications using Heimdal's libhx509. Users should upgrade to Heimdal 7.7.1 or 7.8. There are no known workarounds for this issue.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
heimdal
Launchpad, Ubuntu, Debian
bionic
Released (7.5.0+dfsg-1ubuntu0.2)
focal
Released (7.7.0+dfsg-1ubuntu1.2)
jammy Needed

trusty
Released (1.6~git20131207+dfsg-1ubuntu1.2+esm2)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
upstream
Released (7.7.1, 7.8, 7.8.git20221115.a6cf945+dfsg-1)
kinetic Ignored
(end of life, was needed)
xenial
Released (1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm2)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
lunar Needed

mantic Needed

Patches:
upstream: https://github.com/heimdal/heimdal/commit/eb87af0c2d189c25294c7daf483a47b03af80c2c
Binaries built from this source package are in Universe and so are supported by the community.

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