CVE-2018-0902 — The Cryptography Next Generation (CNG) kernel-mode driver (cng

The Cryptography Next Generation (CNG) kernel-mode driver (cng.sys) in Windows 10 Gold, 1511, 1607, 1703, and 1709. Windows Server 2016 and Windows Server, version 1709 allows a security feature bypass vulnerability due to the way the kernel-mode driver validates and enforces imp

01What is this vulnerability?

The Cryptography Next Generation (CNG) kernel-mode driver (cng.sys) in Windows 10 Gold, 1511, 1607, 1703, and 1709. Windows Server 2016 and Windows Server, version 1709 allows a security feature bypass vulnerability due to the way the kernel-mode driver validates and enforces impersonation levels, aka "Windows Security Feature Bypass Vulnerability". This CVE is unique from CVE-2018-0884.

02Affected products

Vendor	Product	Versions
Microsoft Corporation	Cryptography Next Generation (CNG) kernel	mode driver (cng.sys) — Windows 10 Gold, 1511, 1607, 1703, and 1709. Windows Server 2016 and Windows Server, version 1709

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

08Timeline

• Published: 2018-03-14T17:00:00.000Z
• Last modified: 2024-09-16T19:55:54.725Z

09References

• portal.msrc.microsoft.com — https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0902
• www.securityfocus.com — http://www.securityfocus.com/bid/103266
• www.securitytracker.com — http://www.securitytracker.com/id/1040520