CVE-2011-1231

HIGH

Windows Kernel win32k.sys - Local Privilege Escalation via NULL Pointer Dereference

Title source: llm

Description

win32k.sys in the kernel-mode drivers in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 allows local users to gain privileges via a crafted application that triggers a NULL pointer dereference, a different vulnerability than other "Vulnerability Type 2" CVEs listed in MS11-034, aka "Win32k Null Pointer De-reference Vulnerability."

References (11)

Core 11

Core References

Third Party Advisory, VDB Entry vdb-entry x_refsource_xf

https://exchange.xforce.ibmcloud.com/vulnerabilities/66413

Vendor Advisory vendor-advisory x_refsource_ms

https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-034

US Government Resource third-party-advisory x_refsource_cert

http://www.us-cert.gov/cas/techalerts/TA11-102A.html

Third Party Advisory, VDB Entry vdb-entry x_refsource_osvdb

http://osvdb.org/71737

Third Party Advisory, VDB Entry vdb-entry signature x_refsource_oval

https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12036

Third Party Advisory, VDB Entry vdb-entry x_refsource_bid

http://www.securityfocus.com/bid/47231

Third Party Advisory vdb-entry x_refsource_vupen

http://www.vupen.com/english/advisories/2011/0952

Vendor Advisory x_refsource_confirm

http://support.avaya.com/css/P8/documents/100133352

Third Party Advisory third-party-advisory x_refsource_secunia

http://secunia.com/advisories/44156

Various Sources x_refsource_misc

http://blogs.technet.com/b/srd/archive/2011/04/12/ms11-034-addressing-vulnerabilities-in-the-win32k-subsystem.aspx

Third Party Advisory, VDB Entry vdb-entry x_refsource_sectrack

http://www.securitytracker.com/id?1025345

Scores

CVSS v3 8.4

EPSS 0.0135

EPSS Percentile 68.1%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

Details

CWE

CWE-476

Status published

Products (7)

microsoft/windows_2003_server

microsoft/windows_7 (3 CPE variants)

microsoft/windows_server_2003

microsoft/windows_server_2008 (6 CPE variants)

microsoft/windows_server_2008 r2 (2 CPE variants)

microsoft/windows_vista (2 CPE variants)

microsoft/windows_xp (2 CPE variants)

Published Apr 13, 2011

Tracked Since Feb 18, 2026