Microsoft Windows up to Server 2019 Win32k privileges management

Summaryinfo

A vulnerability classified as critical was found in Microsoft Windows. Affected is an unknown function of the component Win32k. The manipulation results in privileges management. This vulnerability is known as CVE-2020-0726. It is possible to launch the attack remotely. No exploit is available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability classified as critical has been found in Microsoft Windows (Operating System). Affected is an unknown function of the component Win32k. The manipulation with an unknown input leads to a privileges management vulnerability. CWE is classifying the issue as CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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'. This CVE ID is unique from CVE-2020-0691, CVE-2020-0719, CVE-2020-0720, CVE-2020-0721, CVE-2020-0722, CVE-2020-0723, CVE-2020-0724, CVE-2020-0725, CVE-2020-0731.

The weakness was published 02/11/2020 as confirmed security update guide (Website). The advisory is shared for download at portal.msrc.microsoft.com. The public release has been coordinated with the vendor. This vulnerability is traded as CVE-2020-0726. It is possible to launch the attack remotely. The successful exploitation requires a authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 02/11/2020). The MITRE ATT&CK project declares the attack technique as T1068. 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.

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

Similar entries are available at VDB-149944, VDB-149943, VDB-149942 and VDB-149941. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Microsoft

Name

• Windows

Version

• 7 SP1
• 8.1
• 10
• 10 1607
• 10 1709
• 10 1803
• 10 1809
• 10 1903
• 10 1909
• RT 8.1
• Server 1803
• Server 1903
• Server 1909
• Server 2008 R2 SP1
• Server 2008 SP2
• Server 2012
• Server 2016
• Server 2019

License

• commercial

Website

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

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Once again VulDB remains the best source for vulnerability data.

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