Microsoft Windows Vista SP2 up to Server 2012 R2 win32k.sys access control

CVSS Meta Temp Score
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CTI Interest Score
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7.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Microsoft Windows Vista SP2 up to Server 2012 R2. It has been declared as critical. Affected by this issue is some unknown functionality in the library win32k.sys. Such manipulation leads to access control. This vulnerability is listed as CVE-2016-3376. The attack may be performed from remote. In addition, an exploit is available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in Microsoft Windows Vista SP2 up to Server 2012 R2 (Operating System) and classified as critical. Affected by this issue is some unknown processing in the library win32k.sys. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is confidentiality, integrity, and availability.

The weakness was presented 10/11/2016 by Mateusz Jurczyk with Google Project Zero as MS16-123 as confirmed bulletin (Technet). The advisory is shared for download at technet.microsoft.com. This vulnerability is handled as CVE-2016-3376 since 03/15/2016. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details as well as a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1068.

The exploit is available at packetstormsecurity.com. It is declared as proof-of-concept. As 0-day the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 94012 (MS16-123: Security Update for Windows Kernel-Mode Drivers (3192892)), 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 91289 (Microsoft Windows Security Update for Kernel-Mode Drivers (MS16-123)).

Applying the patch MS16-123 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 Exploit-DB (40601), Tenable (94012) and SecurityFocus (BID 93388†). See VDB-92249, VDB-92590, VDB-92589 and VDB-92587 for similar entries. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
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CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

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

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

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Price Prediction: 🔍
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Nessus ID: 94012
Nessus Name: MS16-123: Security Update for Windows Kernel-Mode Drivers (3192892)
Nessus File: 🔍
Nessus Family: 🔍

OpenVAS ID: 802074
OpenVAS Name: Microsoft Windows Kernel-Mode Drivers Privilege Elevation Vulnerabilities (3192892)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

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0-Day Time: 🔍
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Patch: MS16-123

Timelineinfo

03/15/2016 🔍
10/11/2016 +210 days 🔍
10/11/2016 +0 days 🔍
10/11/2016 +0 days 🔍
10/12/2016 +1 days 🔍
10/13/2016 +1 days 🔍
03/25/2025 +3085 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: MS16-123
Researcher: Mateusz Jurczyk
Organization: Google Project Zero
Status: Confirmed

CVE: CVE-2016-3376 (🔍)
GCVE (CVE): GCVE-0-2016-3376
GCVE (VulDB): GCVE-100-92588
SecurityFocus: 93388 - Microsoft Windows Kernel 'Win32k.sys' CVE-2016-3376 Local Privilege Escalation Vulnerability
SecurityTracker: 1036996

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

Entryinfo

Created: 10/12/2016 10:43
Updated: 03/25/2025 01:26
Changes: 10/12/2016 10:43 (65), 04/07/2017 13:24 (14), 09/23/2022 09:50 (4), 06/30/2024 16:24 (22), 03/25/2025 01:26 (1)
Complete: 🔍
Cache ID: 216:372:103

Once again VulDB remains the best source for vulnerability data.

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