Is CVE-2022-45142 in the CISA KEV catalog?

No. CVE-2022-45142 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-45142?

CVE-2022-45142 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2022-45142?

CVE-2022-45142 has an EPSS score of 0.49% (38th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-45142?

Upgrade heimdal on debian 11 to 7.7.0+dfsg-2+deb11u3 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2022-45142

HIGH

7.5

CVSS v3

NVD

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.

CWE-354

How to fix

Remediation Available

heimdalDebian

Fixed in:7.7.0+dfsg-2+deb11u3CVE-2022-45142

Fixed in:7.8.git20221117.28daf24+dfsg-1.1CVE-2022-45142

heimdalUbuntu

Fixed in:1.6~git20131207+dfsg-1ubuntu1.2+esm4USN-5849-1

Fixed in:1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm4USN-5849-1

Fixed in:7.5.0+dfsg-1ubuntu0.4USN-5849-1

Fixed in:7.7.0+dfsg-1ubuntu1.4USN-5849-1

libgssapi3-heimdalUbuntu

Fixed in:1.6~git20131207+dfsg-1ubuntu1.2+esm4USN-5849-1

Fixed in:1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm4USN-5849-1

Fixed in:7.5.0+dfsg-1ubuntu0.4USN-5849-1

Fixed in:7.7.0+dfsg-1ubuntu1.4USN-5849-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

0.49%probability of exploitation in 30 days

38thpercentile

Low risk: more likely to be exploited than 38% of all known CVEs.

References

Mailing List1

openwall.com

Other references1

security.gentoo.org

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-03-06.