CVE-2022-45142

Publication date 8 February 2023

Last updated 11 July 2025

Ubuntu priority

Cvss 3 Severity Score

Description

The fix for CVE-2022-3437 included changing memcmp to be constant time and a workaround for a compiler bug by adding "!= 0" comparisons to the result of memcmp. When these patches were backported to the heimdal-7.7.1 and heimdal-7.8.0 branches (and possibly other branches) a logic inversion sneaked in causing the validation of message integrity codes in gssapi/arcfour to be inverted.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
heimdal	25.10 questing	Vulnerable
	25.04 plucky	Vulnerable
	24.10 oracular	Ignored end of life, was needed
	24.04 LTS noble	Vulnerable
	23.10 mantic	Ignored end of life, was needed
	23.04 lunar	Ignored end of life, was needed
	22.10 kinetic	Ignored end of life, was needs-triage
	22.04 LTS jammy	Needs evaluation
	20.04 LTS focal	Fixed 7.7.0+dfsg-1ubuntu1.4
	18.04 LTS bionic	Fixed 7.5.0+dfsg-1ubuntu0.4
	16.04 LTS xenial	Fixed 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm4
	14.04 LTS trusty	Fixed 1.6~git20131207+dfsg-1ubuntu1.2+esm4

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Notes

mdeslaur

introduced in fix for CVE-2022-3437

rodrigo-zaiden

heimdal master branch not affected, only backports.

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	High
Availability impact	None
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References

Related Ubuntu Security Notices (USN)

USN-5849-1
Heimdal vulnerabilities
8 February 2023