CVE-2022-45142

Gentoo Linux Security Advisory 202310-06

Severity Score

7.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Attend

*SSVC

Descriptions

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.

Helmut Grohne discovered a flaw in Heimdal, an implementation of Kerberos 5 that aims to be compatible with MIT Kerberos. The backports of fixes for CVE-2022-3437 accidentally inverted important memory comparisons in the arcfour-hmac-md5 and rc4-hmac integrity check handlers for gssapi, resulting in incorrect validation of message integrity codes.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

Complete

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:Attend

Exploitation

None

Automatable

Yes

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2022-11-10 CVE Reserved
2023-02-08 CVE Published
2025-03-06 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-354: Improper Validation of Integrity Check Value

CAPEC

References (2)

URL	Tag	Source
https://www.openwall.com/lists/oss-security/2023/02/08/1	Mailing List

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://security.gentoo.org/glsa/202310-06	2023-10-08

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Heimdal Project Search vendor "Heimdal Project"		Heimdal Search vendor "Heimdal Project" for product "Heimdal"				7.7.1 Search vendor "Heimdal Project" for product "Heimdal" and version "7.7.1"		-		Affected
Heimdal Project Search vendor "Heimdal Project"		Heimdal Search vendor "Heimdal Project" for product "Heimdal"				7.8.0 Search vendor "Heimdal Project" for product "Heimdal" and version "7.8.0"		-		Affected