Microsoft Windows 7/Server 2003/Server 2008/Vista/XP win32k.sys input validation

CVSS Meta Temp Score
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CTI Interest Score
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8.1$5k-$25k0.00

A vulnerability classified as critical was found in Microsoft Windows 7/Server 2003/Server 2008/Vista/XP (Operating System). Affected by this vulnerability is an unknown code of the file win32k.sys. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

win32k.sys in the kernel-mode drivers in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 does not properly handle keyboard-layout files, which allows local users to gain privileges via a crafted application, aka "Keyboard Layout Vulnerability."

The weakness was presented 07/10/2012 by Nicolas Economou with Core Security Technologies as MS12-047 as confirmed bulletin (Microsoft Technet). The advisory is shared at technet.microsoft.com. The public release was coordinated in cooperation with Microsoft. This vulnerability is known as CVE-2012-1890 since 03/22/2012. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details and also a private exploit are known. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 03/26/2021).

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 59910 (MS12-047: Vulnerabilities in Windows Kernel-Mode Drivers Could Allow Elevation of Privilege (2718523)), 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 90816 (Microsoft Windows Kernel-Mode Drivers Elevation of Privilege Vulnerability (MS12-047)).

Applying the patch MS12-047 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 X-Force (76719) and Tenable (59910). See 5652 for similar entry.

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  • end of life (old version)

CPE 2.3info

CPE 2.2info

CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 9.0
VulDB Meta Temp Score: 8.1

VulDB Base Score: 9.0
VulDB Temp Score: 8.1
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CVSSv2info

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Exploitinginfo

Class: Input validation
CWE: CWE-20
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Access: Private
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 59910
Nessus Name: MS12-047: Vulnerabilities in Windows Kernel-Mode Drivers Could Allow Elevation of Privilege (2718523)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 903033
OpenVAS Name: Microsoft Windows Kernel-Mode Drivers Privilege Elevation Vulnerabilities (2718523)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

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Patch: MS12-047

Timelineinfo

03/22/2012 🔍
07/10/2012 +109 days 🔍
07/10/2012 +0 days 🔍
07/10/2012 +0 days 🔍
07/10/2012 +0 days 🔍
07/10/2012 +0 days 🔍
07/10/2012 +0 days 🔍
07/11/2012 +1 days 🔍
07/11/2012 +0 days 🔍
07/12/2012 +1 days 🔍
03/26/2021 +3179 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: MS12-047
Researcher: Nicolas Economou
Organization: Core Security Technologies
Status: Confirmed
Coordinated: 🔍

CVE: CVE-2012-1890 (🔍)
OVAL: 🔍

X-Force: 76719
SecurityTracker: 1027231 - Windows Kernel-Mode Driver Bugs Lets Local Users Gain Elevated Privileges
Vulnerability Center: 35527 - [MS12-047] Microsoft Windows Win32k.sys Keyboard-Layout Handling Allows Local Privileges Escalation, High
SecurityFocus: 54285
OSVDB: 83659 - Microsoft Windows win32k.sys Keyboard Layout Handling Local Privilege Escalation

scip Labs: https://www.scip.ch/en/?labs.20140213
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Entryinfo

Created: 07/12/2012 16:18
Updated: 03/26/2021 09:18
Changes: 07/12/2012 16:18 (55), 08/19/2018 19:51 (24), 03/26/2021 09:08 (8), 03/26/2021 09:15 (2), 03/26/2021 09:18 (1)
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