A flaw was found in samba's Heimdal KDC implementation, versions 4.8.x up to, excluding…
Priority LOW 38CWE-358Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · CNA. Fix status from CNA.
Summary
A flaw was found in samba's Heimdal KDC implementation, versions 4.8.x up to, excluding 4.8.12, 4.9.x up to, excluding 4.9.8 and 4.10.x up to, excluding 4.10.3, when used in AD DC mode. A man in the middle attacker could use this flaw to intercept the request to the KDC and replace the user name (principal) in the request with any desired user name (principal) that exists in the KDC effectively obtaining a ticket for that principal.
Why it matters now
EPSS 0.02486 84th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Samba | samba | 4.8.x up to, excluding 4.8.12; 4.9.x up to, excluding 4.9.8; 4.10.x up to, excluding 4.10.3 | — | No fix listed | CNA |
- samba VendorSamba Affected 4.8.x up to, excluding 4.8.12; 4.9.x up to, excluding 4.9.8; 4.10.x up to, excluding 4.10.3 Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* | 4.8.0 to before 4.8.12; 4.9.0 to before 4.9.8; 4.10.0 to before 4.10.3 | Vulnerable | Samba |
| cpe:2.3:a:heimdal_project:heimdal:*:*:*:*:*:*:*:* | 0.8 – 7.5.0 | Vulnerable | Heimdal Project |
- cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* Versions 4.8.0 to before 4.8.12; 4.9.0 to before 4.9.8; 4.10.0 to before 4.10.3 Vulnerable ·Samba
- cpe:2.3:a:heimdal_project:heimdal:*:*:*:*:*:*:*:* Versions 0.8 – 7.5.0 Vulnerable ·Heimdal Project
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Moderate. 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 Storage 3
- Red Hat Virtualization 4
Timeline
- 2026-10-02 Threatist record created from CVE-2018-16860
- 2026-10-03 Alias added: GHSA-282x-mj8h-7q8w
References
Advisory 4
Other 13
- https://www.synology.com/security/advisory/Synology_SA_19_23
- 20190814 APPLE-SA-2019-8-13-2 Additional information for APPLE-SA-2019-7-22-1 iOS 12.4
- 20190814 APPLE-SA-2019-8-13-3 Additional information for APPLE-SA-2019-7-22-4 watchOS 5.3
- 20190814 APPLE-SA-2019-8-13-4 Additional information for APPLE-SA-2019-7-22-5 tvOS 12.4
- 20190814 APPLE-SA-2019-8-13-1 Additional information for APPLE-SA-2019-7-22-2 macOS Mojave 10.14.6, Security Update 2019-004 High Sierra, Security Update 2019-004 Sierra
- 20190816 APPLE-SA-2019-8-13-3 Additional information for APPLE-SA-2019-7-22-4 watchOS 5.3
- 20190816 APPLE-SA-2019-8-13-1 Additional information for APPLE-SA-2019-7-22-2 macOS Mojave 10.14.6, Security Update 2019-004 High Sierra, Security Update 2019-004 Sierra
- 20190816 APPLE-SA-2019-8-13-2 Additional information for APPLE-SA-2019-7-22-1 iOS 12.4
- 20190816 APPLE-SA-2019-8-13-4 Additional information for APPLE-SA-2019-7-22-5 tvOS 12.4
- https://support.apple.com/HT210346
- https://support.apple.com/HT210348
- https://support.apple.com/HT210351
- https://support.apple.com/HT210353
More Samba vulnerabilities
- TI-2020-01431 Netlogon Elevation of Privilege Vulnerability KEVCVSS 3.1CRITICAL 10.0
- TI-2017-05139 Code injection in samba KEVCVSS 3.1CRITICAL 9.8
- TI-2015-00210 The Netlogon server implementation in smbd in Samba 3.5.x and 3.6.x before 3.6.25, 4.0.x… CVSS 2.0HIGH 10.0
- TI-2003-00081 Buffer overflow in the SMB/CIFS packet fragment re-assembly code for SMB daemon (smbd) in… CVSS 2.0HIGH 10.0
- TI-2003-00185 Buffer overflow in the call_trans2open function in trans2.c for Samba 2.2.x before… CVSS 2.0HIGH 10.0
- TI-2007-02362 Multiple heap-based buffer overflows in the NDR parsing in smbd in Samba 3.0.0 through… CVSS 2.0HIGH 10.0
Sources
- CVE-2018-16860 · CVE Program
- CVE-2018-16860 · NVD
- FIRST EPSS
- GHSA-282x-mj8h-7q8w · GitHub Advisory Database · CC BY 4.0
- CVE-2018-16860 · 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