The fix for CVE-2022-3437 included changing memcmp to be constant time and a workaround…
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Samba | unknown | — | No fix listed | CNA |
- Samba Vendor— Affected unknown Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:heimdal_project:heimdal:7.7.1:*:*:*:*:*:*:* | 7.7.1 | Vulnerable | Heimdal Project |
| cpe:2.3:a:heimdal_project:heimdal:7.8.0:*:*:*:*:*:*:* | 7.8.0 | Vulnerable | Heimdal Project |
- cpe:2.3:a:heimdal_project:heimdal:7.7.1:*:*:*:*:*:*:* Versions 7.7.1 Vulnerable ·Heimdal Project
- cpe:2.3:a:heimdal_project:heimdal:7.8.0:*:*:*:*:*:*:* Versions 7.8.0 Vulnerable ·Heimdal Project
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
Not affected: 5 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat Storage 3
Timeline
- 2026-10-02 Threatist record created from CVE-2022-45142
- 2026-10-03 Alias added: GHSA-5gp7-pf54-xc33
References
More Heimdal Project Heimdal vulnerabilities
- TI-2011-04182 Buffer overflow in libtelnet/encrypt.c in telnetd in FreeBSD 7.3 through 9.0, MIT… CVSS 2.0HIGH 10.0
- TI-2022-21958 Heimdal before 7.7.1 allows remote attackers to execute arbitrary code because of an… CVSS 3.1CRITICAL 9.8
- TI-2004-00398 k5admind (kadmind) for Heimdal allows remote attackers to execute arbitrary code via a… CVSS 3.1CRITICAL 9.8
- TI-2022-20894 PAC parsing in MIT Kerberos 5 (aka krb5) before 1.19.4 and 1.20.x before 1.20.1 has… CVSS 3.1HIGH 8.8
- TI-2017-08165 Heimdal before 7.4 allows remote attackers to impersonate services with Orpheus' Lyre… CVSS 3.1HIGH 8.1
- TI-2021-20265 Heimdal before 7.7.1 allows attackers to cause a NULL pointer dereference in a SPNEGO… CVSS 3.1HIGH 7.5
Sources
- CVE-2022-45142 · CVE Program
- CVE-2022-45142 · NVD
- FIRST EPSS
- GHSA-5gp7-pf54-xc33 · GitHub Advisory Database · CC BY 4.0
- CVE-2022-45142 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences