Vulnerability in Heimdal Project
CVE-2022-45142
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.005 (40.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 40.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: -0.000
Affected products
- Heimdal Project — versions 7.7.1, 7.8.0
- Samba
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.openwall.com/lists/oss-security/2023/02/08/1 (Mailing List)
- security.gentoo.org/glsa/202310-06 (vendor-advisory)
Frequently asked questions
- What is CVE-2022-45142?
- CVE-2022-45142 is a high-severity vulnerability in Heimdal Project, classified under Improper Validation of Integrity Check Value. CVSS score: 7.5/10. Published 2023-03-06.
- How severe is CVE-2022-45142?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2022-45142 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.