Microsoft Windows 7 SP1/Server 2008 R2 SP1/Server 2008 SP2 Win32k access control

Summaryinfo

A vulnerability identified as critical has been detected in Microsoft Windows 7 SP1/Server 2008 R2 SP1/Server 2008 SP2. This impacts an unknown function of the component Win32k. The manipulation leads to access control. This vulnerability is documented as CVE-2019-1132. The attack needs to be performed locally. Additionally, an exploit exists. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Microsoft Windows 7 SP1/Server 2008 R2 SP1/Server 2008 SP2 (Operating System). This issue affects some unknown functionality of the component Win32k. 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 summary by CVE is:

An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka 'Win32k Elevation of Privilege Vulnerability'.

The weakness was released 07/09/2019 as confirmed security update guide (Website). It is possible to read the advisory at portal.msrc.microsoft.com. The public release was coordinated with Microsoft. The identification of this vulnerability is CVE-2019-1132 since 11/26/2018. Attacking locally is a requirement. A simple authentication is required for exploitation. Technical details are unknown but a public exploit is available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK. The advisory points out:

An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

A public exploit has been developed by Shivam Trivedi (Vlad-tri) in C and been published 3 weeks after the advisory. The exploit is available at github.com. It is declared as attacked. We expect the 0-day to have been worth approximately $25k-$100k. The CISA Known Exploited Vulnerabilities Catalog lists this issue since 03/15/2022 with a due date of 04/05/2022:

Apply updates per vendor instructions.

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Exploit-DB (47176) and Zero-Day.cz (548). Entries connected to this vulnerability are available at VDB-137535, VDB-137534, VDB-137533 and VDB-137532. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Microsoft

Name

• Windows

Version

• 7 SP1
• Server 2008 R2 SP1
• Server 2008 SP2

License

• commercial

Website

• Vendor: https://www.microsoft.com/
• Product: https://www.microsoft.com/en-us/windows

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