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Category:   OS (Microsoft)  >   Windows DLL (Any) Vendors:   Microsoft
Microsoft Windows SAM/LSAD Connection Downgrade Attack Lets Remote Users Hijack the Target Session
SecurityTracker Alert ID:  1035534
SecurityTracker URL:  http://securitytracker.com/id/1035534
CVE Reference:   CVE-2016-0128   (Links to External Site)
Date:  Apr 13 2016
Impact:   Disclosure of system information, Disclosure of user information, Modification of system information, Modification of user information, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): Vista SP2, 2008 SP2, 7 SP1, 2008 R2 SP1, 8.1, 2012, 2012 R2, RT 8.1, 10; and prior service packs
Description:   A vulnerability was reported in Microsoft Windows. A remote user can hijack the target session.

A remote user that can conduct a man-in-the-middle attack against DCE/RPE connections can impersonate the target user against the Security Account Manager Remote Protocol (SAMR) and the Local Security Authority (Domain Policy) (LSAD) implementations to obtain read/write access to the target Security Account Manager database. This can be exploited to obtain passwords in the database.

[Editor's note: Samba is also affected by this vulnerability, as described in CVE-2016-2118 (Alert ID 1035533). This vulnerability is known as "Badlock".]

Stefan Metzmacher of SAMBA+ reported this vulnerability.

Impact:   A remote user can hijack the target session.
Solution:   The vendor has issued a fix.

Windows Vista Service Pack 2:

https://www.microsoft.com/downloads/details.aspx?familyid=9cb0e7d9-5988-464d-ae41-fa14a7c7bc6d

Windows Vista x64 Edition Service Pack 2:

https://www.microsoft.com/downloads/details.aspx?familyid=5440a2cb-dc1f-462f-88d4-235dc74bbb97

Windows Server 2008 for 32-bit Systems Service Pack 2:

https://www.microsoft.com/downloads/details.aspx?familyid=9d913104-d0e7-4f5d-b48b-0fce91c97388

Windows Server 2008 for x64-based Systems Service Pack 2:

https://www.microsoft.com/downloads/details.aspx?familyid=b149bdcd-ab58-4969-91ff-62d3f05f9a44

Windows Server 2008 for Itanium-based Systems Service Pack 2:

https://www.microsoft.com/downloads/details.aspx?familyid=eb67603c-b9f7-4bce-9c15-53cdd598bb99

Windows 7 for 32-bit Systems Service Pack 1:

https://www.microsoft.com/downloads/details.aspx?familyid=16c6eaeb-6206-4bb3-b1cd-23019ad1935c

Windows 7 for x64-based Systems Service Pack 1:

https://www.microsoft.com/downloads/details.aspx?familyid=3b8134da-80f1-4034-af03-5e3b1d15c802

Windows Server 2008 R2 for x64-based Systems Service Pack 1:

https://www.microsoft.com/downloads/details.aspx?familyid=3522be41-4a80-4701-8ee1-90e77bb116fc

Windows Server 2008 R2 for Itanium-based Systems Service Pack 1:

https://www.microsoft.com/downloads/details.aspx?familyid=875ba904-a814-43f4-acf0-ca6280040b0d

Windows 8.1 for 32-bit Systems:

https://www.microsoft.com/downloads/details.aspx?familyid=06d79043-e241-4971-ae85-cc2750241633

Windows 8.1 for x64-based Systems:

https://www.microsoft.com/downloads/details.aspx?familyid=a9375617-18e6-4b7a-bbca-9cda60db8791

Windows Server 2012:

https://www.microsoft.com/downloads/details.aspx?familyid=22447fc8-74d3-423d-8acd-954037eb172d

Windows Server 2012 R2:

https://www.microsoft.com/downloads/details.aspx?familyid=c0f28b2c-883a-4acb-915f-a1d98b246a5d

Windows Server 2008 for 32-bit Systems Service Pack 2:

https://www.microsoft.com/downloads/details.aspx?familyid=9d913104-d0e7-4f5d-b48b-0fce91c97388

Windows Server 2008 for x64-based Systems Service Pack 2:

https://www.microsoft.com/downloads/details.aspx?familyid=b149bdcd-ab58-4969-91ff-62d3f05f9a44

Windows Server 2008 R2 for x64-based Systems Service Pack 1:

https://www.microsoft.com/downloads/details.aspx?familyid=3522be41-4a80-4701-8ee1-90e77bb116fc

Windows Server 2012:

https://www.microsoft.com/downloads/details.aspx?familyid=22447fc8-74d3-423d-8acd-954037eb172d

Windows Server 2012 R2:

https://www.microsoft.com/downloads/details.aspx?familyid=c0f28b2c-883a-4acb-915f-a1d98b246a5d

The Microsoft advisory is available at:

https://technet.microsoft.com/library/security/ms16-047

Vendor URL:  technet.microsoft.com/library/security/ms16-047 (Links to External Site)
Cause:   Authentication error

Message History:   None.


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