MS16-077: Security Update for WPAD (3165191)

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


Synopsis :

The remote host is affected by multiple elevation of privilege
vulnerabilities.

Description :

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

- An elevation of privilege vulnerability exists in the
Web Proxy Auto Discovery (WPAD) protocol due to improper
handling of the proxy discovery process. A remote
attacker can exploit this, by responding to NetBIOS name
requests for WPAD, to bypass security restrictions and
gain elevated privileges. (CVE-2016-3213)

- An elevation of privilege vulnerability exists in the
Web Proxy Auto Discovery (WPAD) protocol due to improper
handling of certain proxy discovery scenarios. A remote
attacker can exploit this to elevate privileges,
resulting in the ability to disclose or control network
traffic. (CVE-2016-3236)

- An elevation of privilege vulnerability exists in
NetBIOS due to improper handling of responses. A remote
attacker can exploit this, via specially crafted NetBIOS
responses, to appear as a trusted network device,
resulting in the ability to render untrusted content in
a browser outside of Enhanced Protected Mode (EPM) or an
application container. (CVE-2016-3299)

See also :

https://technet.microsoft.com/library/security/MS16-077

Solution :

Microsoft has released a set of patches for Windows Vista, 2008, 7,
2008 R2, 8, 2012, 8.1, RT 8.1, 2012 R2, and 10.

Note that cumulative update 3160005 in MS16-063 must also be installed
in order to fully resolve CVE-2016-3213.

Risk factor :

Critical / CVSS Base Score : 10.0
(CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 7.8
(CVSS2#E:POC/RL:OF/RC:C)
Public Exploit Available : true

Family: Windows : Microsoft Bulletins

Nessus Plugin ID: 91605 ()

Bugtraq ID: 91111
91114
92387

CVE ID: CVE-2016-3213
CVE-2016-3236
CVE-2016-3299

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