CVE-2018-8340

Description

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.

6.5

CVSS

Severity: Medium

CVSS 3.0 •

CVSS 2.0 •

EPSS 6.93% Top 10%

Vendor Advisory microsoft.com

Affected: Microsoft Windows Server 2016

Affected: Microsoft Windows Server 2012 R2

Affected: Microsoft Windows 10 Servers

References

Link	Tags
http://www.securitytracker.com/id/1041474	third party advisory vdb entry
http://www.securityfocus.com/bid/105029	third party advisory vdb entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8340	patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2018-8340?: CVE-2018-8340 has been scored as a medium severity vulnerability.
How to fix CVE-2018-8340?: To fix CVE-2018-8340, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2018-8340 being actively exploited in the wild?: It is possible that CVE-2018-8340 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~7% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2018-8340?: CVE-2018-8340 affects Microsoft Windows Server 2016, Microsoft Windows Server 2012 R2, Microsoft Windows 10 Servers.

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