Vulnerability in Microsoft Windows 10 Servers
CVE-2018-8340
A security feature bypass vulnerability exists when Active Directory Federation Services (AD FS) improperly handles multi-factor authentication requests, aka "AD FS Security Feature Bypass Vulnerability." This affects Windows Server 2016, Windows Server 2012 R2, Windows 10 Servers.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.076 (94.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 94.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.076 · newest: 0.076 · change: 0.000
Affected products
- Microsoft Windows 10 Servers — versions version 1709 (Server Core Installation), version 1803 (Server Core Installation)
- Microsoft Windows Server 2012 — versions r2
- Microsoft Windows Server 2012 R2 — versions (Server Core installation)
- Microsoft Windows Server 2016 — versions (Server Core installation)
- Microsoft Windows Server 2016 — versions 1709, 1803
Public proof-of-concept exploits
References
- www.securitytracker.com/id/1041474 (VDB Entry, Third Party Advisory, vdb-entry)
- www.securityfocus.com/bid/105029 (VDB Entry, Third Party Advisory, vdb-entry)
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8340 (Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2018-8340?
- CVE-2018-8340 is a medium-severity vulnerability in Microsoft Windows 10 Servers. CVSS score: 6.5/10. Published 2018-08-15.
- How severe is CVE-2018-8340?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2018-8340 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.