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CVE Number Vulnerability Product Severity Date
MS16-020 Security Update for Active Directory Federation Services to Address Denial of Service (3134222) Windows Server Important 10-02-2016

Technical Information

Brief overview of the risk:
This security update resolves a vulnerability in Active Directory Federation Services (ADFS). The vulnerability could allow denial of service if an attacker sends certain input data during forms-based authentication to an ADFS server, causing the server to become nonresponsive.

Detailed Information on the risk:

A denial of service vulnerability exists when Active Directory Federation Services (ADFS) attempts to process certain input during forms-based authentication. An attacker who successfully exploits this vulnerability by sending certain input during forms-based authentication could cause the server to become nonresponsive.

Further information on this exploit is available at : MS16-020

Windows Server 2012 R2
Windows Server 2012 R2 (Server Core installation)

Affected Software

Windows Server 2012 R2
Windows Server 2012 R2 (Server Core installation)