Microsoft Active Directory Federation Services Lets Remote Users Bypass Some Multi-Factor Authentication on the Target System
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SecurityTracker Alert ID: 1041474 |
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SecurityTracker URL: http://securitytracker.com/id/1041474
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CVE Reference:
CVE-2018-8340
(Links to External Site)
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Date: Aug 15 2018
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Impact:
Host/resource access via network
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Fix Available: Yes Vendor Confirmed: Yes
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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.
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Impact:
A remote authenticated user can bypass some multi-factor authentication steps on the target system.
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Solution:
The vendor has issued a fix.
The Microsoft advisories are available at:
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8340
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4343897
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4343909
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4343887
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4343888
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4343898
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Vendor URL: portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8340 (Links to External Site)
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Cause:
Authentication error
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Underlying OS: Windows (2012), Windows (2016), Windows (10)
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Underlying OS Comments: 2012 R2, 2016, 10 Version 1709, 10 Version 1803
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Message History:
None.
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Source Message Contents
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[Original Message Not Available for Viewing]
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