Microsoft Windows 10 1809/10 1903/Server 1903/Server 2019 Update Client privileges management

Summaryinfo

A vulnerability categorized as critical has been discovered in Microsoft Windows 10 1809/10 1903/Server 1903/Server 2019. Affected by this vulnerability is an unknown functionality of the component Update Client. The manipulation results in privileges management. This vulnerability was named CVE-2019-1323. The attack may be performed from remote. There is no available exploit. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability was found in Microsoft Windows 10 1809/10 1903/Server 1903/Server 2019 (Operating System). It has been classified as critical. Affected is an unknown functionality of the component Update Client. 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 the Microsoft Windows Update Client when it does not properly handle privileges, aka 'Microsoft Windows Update Client Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2019-1336.

The weakness was presented 10/08/2019 as confirmed security update guide (Website). The advisory is shared for download at portal.msrc.microsoft.com. The public release was coordinated in cooperation with the vendor. This vulnerability is traded as CVE-2019-1323 since 11/26/2018. It is possible to launch the attack remotely. The successful exploitation needs 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 09/26/2020). The MITRE ATT&CK project declares the attack technique as T1068. The advisory points out:

An elevation of privilege vulnerability exists in the Microsoft Windows Update Client when it does not properly handle privileges. An attacker who successfully exploited this vulnerability could run processes in an elevated context. An attacker could then install programs; view, change or delete data.

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

See VDB-143090, VDB-143089, VDB-143087 and VDB-143086 for similar entries. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Operating System

Vendor

• Microsoft

Name

• Windows

Version

• 10 1809
• 10 1903
• Server 1903
• Server 2019

License

• commercial

Website

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

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Entryinfo

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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