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Category:   OS (Microsoft)  >   Windows DLL (Any) Vendors:   Microsoft
Microsoft Credential Security Support Provider Protocol Request Validation Bug Lets Remote Users Execute Code on the Target System
SecurityTracker Alert ID:  1040506
SecurityTracker URL:
CVE Reference:   CVE-2018-0886   (Links to External Site)
Date:  Mar 13 2018
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 7 SP1, 2008 R2 SP1, 2008 SP2, 2012, 2012 R2, 8.1, RT 8.1, 2016, 10, 10 Version 1511, 10 Version 1607, 10 Version 1703, 10 Version 1709
Description:   A vulnerability was reported in the Microsoft Credential Security Support Provider (CredSSP) protocol implementation. A remote user can execute code on the target system.

The CredSSP protocol does not properly validate requests during authentication. A remote user that can conduct a man-in-the-middle attack can relay user credentials and use them to execute code on the target system.

Applications that depend on CredSSP for authentication may be affected.

Eyal Karni, Yaron Zinar, Roman Blachman @ Preempt, Research Labs reported this vulnerability.

Impact:   A remote user can execute code on the target system.
Solution:   The vendor has issued a fix.

[Editor's note: The vendor states that Group Policy settings must be enabled and Remote Desktop clients must be updated to be fully protected against this vulnerability.

The Microsoft advisories are available at:

Vendor URL: (Links to External Site)
Cause:   Access control error

Message History:   None.

 Source Message Contents

[Original Message Not Available for Viewing]

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