Microsoft Windows up to 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

Summaryinfo

A vulnerability labeled as critical has been found in Microsoft Windows 7/Server 2003/Server 2008/Vista/XP. This impacts an unknown function of the file win32k.sys. The manipulation results in input validation. This vulnerability is reported as CVE-2012-1893. The attack can be launched remotely. Moreover, an exploit is present. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability classified as critical has been found in Microsoft Windows 7/Server 2003/Server 2008/Vista/XP (Operating System). Affected is an unknown part of the file win32k.sys. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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 validate callback parameters during creation of a hook procedure, which allows local users to gain privileges via a crafted application, aka "Win32k Incorrect Type Handling Vulnerability."

The weakness was disclosed 07/10/2012 by Lufeng Li with Secunia Research as MS12-047 as confirmed bulletin (Microsoft Technet). The advisory is shared for download at technet.microsoft.com. The public release has been coordinated in cooperation with the vendor. This vulnerability is traded as CVE-2012-1893 since 03/22/2012. The exploitability is told to be difficult. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details and a private exploit are known. The current price for an exploit might be approx. USD $5k-$25k (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 (76720), Tenable (59910), SecurityFocus (BID 54302†), OSVDB (83658†) and SecurityTracker (ID 1027231†). The entry VDB-5653 is pretty similar. Once again VulDB remains the best source for vulnerability data.

Productinfo

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Support

  • end of life (old version)

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

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

VulDB Base Score: 9.0
VulDB Temp Score: 8.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
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: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

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 🔍
07/12/2012 +1 days 🔍
03/26/2021 +3179 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: MS12-047
Researcher: Lufeng Li
Organization: Secunia Research
Status: Confirmed
Coordinated: 🔍

CVE: CVE-2012-1893 (🔍)
GCVE (CVE): GCVE-0-2012-1893
GCVE (VulDB): GCVE-100-5652

OVAL: 🔍

X-Force: 76720
SecurityFocus: 54302
OSVDB: 83658 - Microsoft Windows win32k.sys Hook Procedure Creation Incorrect Type Handling Local Privilege Escalation
SecurityTracker: 1027231 - Windows Kernel-Mode Driver Bugs Lets Local Users Gain Elevated Privileges
Vulnerability Center: 35529 - [MS12-047] Microsoft Windows Win32k.sys Type Handling Allows Local Privileges Escalation, High

scip Labs: https://www.scip.ch/en/?labs.20140213
See also: 🔍

Entryinfo

Created: 07/12/2012 16:12
Updated: 03/26/2021 09:05
Changes: 07/12/2012 16:12 (55), 08/19/2018 19:51 (23), 03/26/2021 08:58 (8), 03/26/2021 09:00 (2), 03/26/2021 09:05 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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