Microsoft Windows up to Server 2019 OpenSSH privileges management

Summaryinfo

A vulnerability marked as critical has been reported in Microsoft Windows up to Server 2019. This impacts an unknown function of the component OpenSSH. Performing a manipulation results in privileges management. This vulnerability was named CVE-2020-1292. The attack may be initiated remotely. There is no available exploit. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability was found in Microsoft Windows up to Server 2019 (Operating System). It has been classified as critical. This affects an unknown code of the component OpenSSH. 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. The summary by CVE is:

An elevation of privilege vulnerability exists in OpenSSH for Windows when it does not properly restrict access to configuration settings, aka 'OpenSSH for Windows Elevation of Privilege Vulnerability'.

The weakness was presented 06/09/2020 as confirmed security update guide (Website). It is possible to read the advisory at portal.msrc.microsoft.com. The public release was coordinated in cooperation with Microsoft. This vulnerability is uniquely identified as CVE-2020-1292. The exploitability is told to be difficult. It is possible to initiate the attack remotely. A authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 06/10/2020). 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 OpenSSH for Windows when it does not properly restrict access to configuration settings. An attacker who successfully exploited this vulnerability could replace the shell with a malicious binary.

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

See VDB-156367, VDB-156366, VDB-156365 and VDB-156364 for similar entries. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Operating System

Vendor

• Microsoft

Name

• Windows

Version

• 10 1803
• 10 1809
• 10 1903
• 10 1909
• 10 2004
• Server 1803
• Server 1903
• Server 1909
• Server 2004
• Server 2019

License

• commercial

Website

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

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