CVE-2022-45142

7.5 highEPSS 0.5%

High (7.5) in heimdal project heimdal. EPSS 0.5% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

7.5 high

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

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 41% of CVEs (scores of 2026-10-31)
CWE: CWE-354
Published: 2023-03-06
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

heimdal_project:heimdal

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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