What’s Vulnerable › Vulnerabilities

CVE-2022-45142

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-03-06 · updated 2026-06-17
• Weakness: CWE-354

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.

Affected products

• Heimdal Software Kerberos: 7.7.1, 7.8.0

References

• https://security.gentoo.org/glsa/202310-06
• https://www.openwall.com/lists/oss-security/2023/02/08/1
• https://security.gentoo.org/glsa/202310-06
• https://www.openwall.com/lists/oss-security/2023/02/08/1

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