Microsoft Windows up to Server 2019 dssvc.dll privileges management

Summaryinfo

A vulnerability was found in Microsoft Windows up to Server 2019. It has been classified as critical. Impacted is an unknown function in the library dssvc.dll. This manipulation causes privileges management. This vulnerability is handled as CVE-2019-1420. It is possible to launch the attack on the local host. There is not any exploit available. Applying a patch is the recommended action to fix this issue.

Detailsinfo

A vulnerability has been found in Microsoft Windows up to Server 2019 (Operating System) and classified as critical. Affected by this vulnerability is an unknown code block in the library dssvc.dll. The manipulation with an unknown input leads to a privileges management vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

An elevation of privilege vulnerability exists in the way that the dssvc.dll handles file creation allowing for a file overwrite or creation in a secured location, aka 'Windows Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2019-1422, CVE-2019-1423.

The weakness was released 11/12/2019 as confirmed security update guide (Website). The advisory is shared at portal.msrc.microsoft.com. The public release was coordinated with Microsoft. This vulnerability is known as CVE-2019-1420. An attack has to be approached locally. The requirement for exploitation is a single authentication. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 02/11/2024). MITRE ATT&CK project uses the attack technique T1068 for this issue. The advisory points out:

An elevation of privilege vulnerability exists in the way that the dssvc.dll handles file creation allowing for a file overwrite or creation in a secured location. An attacker who successfully exploited the vulnerability could execute code with elevated permissions.

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

Entries connected to this vulnerability are available at VDB-145384, VDB-145383, VDB-145382 and VDB-145380. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Operating System

Vendor

• Microsoft

Name

• Windows

Version

• 10
• 10 1607
• 10 1703
• 10 1709
• 10 1803
• 10 1809
• 10 1903
• Server 1803
• Server 1903
• Server 2016
• Server 2019

License

• commercial

Website

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

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion