MS16-101: Security Update for Windows Authentication Methods (3178465)

This script is Copyright (C) 2016-2017 Tenable Network Security, Inc.


Synopsis :

The remote Windows host is affected by multiple vulnerabilities.

Description :

The remote Windows host is missing a security update. It is,
therefore, affected by multiple vulnerabilities :

- A security downgrade vulnerability exists in Kerberos
due to improper handling of password change requests.
A man-in-the-middle attacker can exploit this to cause
the authentication protocol to fall back to the NT LAN
Manager (NTLM) authentication protocol, resulting in a
bypass of Kerberos authentication. (CVE-2016-3237)

- An elevation of privilege vulnerability exists in
Windows Netlogon due to a failure to properly establish
secure communications to a domain controller. A local
attacker who has access to a domain-joined machine that
points to a domain controller running either Windows
Server 2012 or 2012 R2 can exploit this vulnerability
to gain elevated privileges via a specially crafted
application. (CVE-2016-3300)

See also :

https://technet.microsoft.com/library/security/MS16-101

Solution :

Microsoft has released a set of patches for Windows Vista, 2008, 7,
2008 R2, 2012, 8.1, RT 8.1, 2012 R2, and 10.

Risk factor :

High / CVSS Base Score : 7.2
(CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 5.6
(CVSS2#E:POC/RL:OF/RC:C)
Public Exploit Available : true

Family: Windows : Microsoft Bulletins

Nessus Plugin ID: 92823 ()

Bugtraq ID: 92290
92296

CVE ID: CVE-2016-3237
CVE-2016-3300

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