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CVE-2022-44640

Published: 25 December 2022

Heimdal before 7.7.1 allows remote attackers to execute arbitrary code because of an invalid free in the ASN.1 codec used by the Key Distribution Center (KDC).

Notes

AuthorNote
mdeslaur
per upstream Samba, this vulnerability doesn't actually affect
Samba, but the code has been patched in case the API is used in
the future. See the following post:
https://bugzilla.samba.org/show_bug.cgi?id=14929#c15

Priority

Medium

Cvss 3 Severity Score

9.8

Score breakdown

Status

Package Release Status
heimdal
Launchpad, Ubuntu, Debian
jammy Needed

kinetic Ignored
(end of life, was needed)
upstream
Released (7.7.1, 7.8, 7.8.git20221115.a6cf945+dfsg-1)
xenial
Released (1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm3)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
bionic
Released (7.5.0+dfsg-1ubuntu0.3)
focal
Released (7.7.0+dfsg-1ubuntu1.3)
trusty
Released (1.6~git20131207+dfsg-1ubuntu1.2+esm3)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
mantic Needed

lunar Ignored
(end of life, was needed)
Patches:
upstream: https://github.com/heimdal/heimdal/commit/ea5ec8f174920cb80ce2b168b49195378420449e (heimdal-7.7.1)


Binaries built from this source package are in Universe and so are supported by the community.
samba
Launchpad, Ubuntu, Debian
bionic Not vulnerable

focal Not vulnerable

jammy Not vulnerable

kinetic Not vulnerable

trusty Not vulnerable

upstream
Released (4.15.13,4.17.4,4.16.8)
xenial Not vulnerable

lunar Not vulnerable

mantic Not vulnerable

Patches:

upstream: https://git.samba.org/?p=samba.git;a=commit;h=b4c3ce6fb9b2aebbbe7d802ce48c691a9cabcf4f (4.15)
upstream: https://git.samba.org/?p=samba.git;a=commit;h=73c7c6ec9bc3a1993e766f119e9e29905ded5e28 (4.15)

Severity score breakdown

Parameter Value
Base score 9.8
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H