Microsoft Windows Vista SP2 up to Server 2016 win32k.sys access control

CVSS Meta Temp Score
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CTI Interest Score
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7.6$0-$5k0.00

A vulnerability classified as critical has been found in Microsoft Windows (Operating System). This affects an unknown part in the library win32k.sys. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-264. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was released 11/08/2016 by Neel Mehta with Trend Micro as MS16-135 as confirmed bulletin (Technet). It is possible to read the advisory at technet.microsoft.com. This vulnerability is uniquely identified as CVE-2016-7255 since 09/09/2016. The exploitability is told to be easy. Attacking locally is a requirement. A authentication is necessary for exploitation. Technical details and a public exploit are known. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

A public exploit has been developed by IOactive in ANSI C and been published 3 weeks after the advisory. The exploit is shared for download at securityfocus.com. It is declared as highly functional. We expect the 0-day to have been worth approximately $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 94636 (MS16-135: Security Update for Windows Kernel-Mode Drivers (3199135)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows : Microsoft Bulletins. The commercial vulnerability scanner Qualys is able to test this issue with plugin 91294 (Microsoft Security Update for Windows Kernel-Mode Drivers (MS16-135)). The CISA Known Exploited Vulnerabilities Catalog lists this issue since 11/03/2021 with a due date of 05/03/2022:

Apply updates per vendor instructions.

Applying the patch MS16-135 is able to eliminate this problem. The bugfix is ready for download at technet.microsoft.com. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (94636) and Exploit-DB (40823). Entries connected to this vulnerability are available at 93407, 93408, 93409 and 93410.

Productinfo

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CPE 2.3info

CPE 2.2info

Video

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CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.6

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
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NVD Base Score: 7.8
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CVSSv2info

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Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Highly functional
Author: IOactive
Programming Language: 🔍
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Nessus ID: 94636
Nessus Name: MS16-135: Security Update for Windows Kernel-Mode Drivers (3199135)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 802730
OpenVAS Name: Microsoft Windows Kernel-Mode Drivers Multiple Vulnerabilities (3199135)
OpenVAS File: 🔍
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Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Patch
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Patch: MS16-135

Timelineinfo

09/09/2016 🔍
11/08/2016 +60 days 🔍
11/08/2016 +0 days 🔍
11/08/2016 +0 days 🔍
11/09/2016 +1 days 🔍
11/10/2016 +1 days 🔍
11/24/2016 +14 days 🔍
11/24/2016 +0 days 🔍
04/19/2024 +2703 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: MS16-135
Researcher: Neel Mehta
Organization: Trend Micro
Status: Confirmed

CVE: CVE-2016-7255 (🔍)
OVAL: 🔍

SecurityTracker: 1037251
SecurityFocus: 94064 - Microsoft Windows Kernel 'Win32k.sys' CVE-2016-7255 Local Privilege Escalation Vulnerability

scip Labs: https://www.scip.ch/en/?labs.20161215
See also: 🔍

Entryinfo

Created: 11/09/2016 10:36
Updated: 04/19/2024 06:56
Changes: 11/09/2016 10:36 (72), 04/07/2017 13:18 (20), 09/30/2022 08:59 (4), 09/30/2022 09:01 (1), 04/19/2024 06:56 (28)
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