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Category:   Application (Directory)  >   Microsoft Active Directory Vendors:   Microsoft
Microsoft Active Directory Federation Services Lets Remote Users Bypass Some Multi-Factor Authentication on the Target System
SecurityTracker Alert ID:  1041474
SecurityTracker URL:
CVE Reference:   CVE-2018-8340   (Links to External Site)
Date:  Aug 15 2018
Impact:   Host/resource access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Microsoft Active Directory Federation Services. A remote user can bypass some multi-factor authentication steps.

A remote user can send a specially crafted authentication request to bypass some but not all multi-factor authentication steps on the target system.

Andrew Lee at OKTA REX Team reported this vulnerability.

Impact:   A remote authenticated user can bypass some multi-factor authentication steps on the target system.
Solution:   The vendor has issued a fix.

The Microsoft advisories are available at:

Vendor URL: (Links to External Site)
Cause:   Authentication error
Underlying OS:  Windows (2012), Windows (2016), Windows (10)
Underlying OS Comments:  2012 R2, 2016, 10 Version 1709, 10 Version 1803

Message History:   None.

 Source Message Contents

[Original Message Not Available for Viewing]

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