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Category:   OS (Microsoft)  >   Windows DLL (Any) Vendors:   Microsoft
Microsoft Windows Flaw Lets Remote Users Obtain the Target User's NTLM Hash
SecurityTracker Alert ID:  1039997
SecurityTracker URL:  http://securitytracker.com/id/1039997
CVE Reference:   CVE-2017-11927   (Links to External Site)
Date:  Dec 13 2017
Impact:   Disclosure of authentication information, Disclosure of system information, Disclosure of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 7 SP1, 2008 R2 SP1, 2008 SP2, 2012, 8.1, 2012 R2, RT 8.1, 10, 10 Version 1511, 2016, 10 Version 1607, 10 Version 1703, 10 Version 1709
Description:   A vulnerability was reported in the Microsoft Windows 'its://' protocol handler. A remote user can obtain potentially sensitive information on the target system.

A remote user can create specially crafted content (e.g., web site, SMB, path, UNC path) that, when loaded by the target user, will load an 'its://' URL to cause the target user's NTLM hash to be disclosed when attempting to determine the zone of the request. The user can then conduct a brute-force attack against the hash value to determine the password.

Impact:   A remote user can obtain the target user's NTLM hash.
Solution:   The vendor has issued a fix.

The Microsoft advisories are available at:

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11927
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4054522
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4054518
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4054521
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4053473
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4054519
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4054517
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4053578
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4053579
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4053580
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4053581
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4054520
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4054523

Vendor URL:  portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11927 (Links to External Site)
Cause:   Access control error

Message History:   None.


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