Microsoft Visual Studio Git input validation

Summaryinfo

A vulnerability has been found in Microsoft Visual Studio 2017 Version 15.0/2017 Version 15.9/2019 Version 16.0/2019 Version 16.4 and classified as critical. Impacted is an unknown function of the component Git. This manipulation causes input validation. This vulnerability is handled as CVE-2019-1352. The attack can be initiated remotely. There is not any exploit available. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability was found in Microsoft Visual Studio 2017 Version 15.0/2017 Version 15.9/2019 Version 16.0/2019 Version 16.4 (Programming Tool Software). It has been declared as critical. Affected by this vulnerability is an unknown part of the component Git. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A remote code execution vulnerability exists when Git for Visual Studio improperly sanitizes input, aka 'Git for Visual Studio Remote Code Execution Vulnerability'. This CVE ID is unique from CVE-2019-1349, CVE-2019-1350, CVE-2019-1354, CVE-2019-1387.

The weakness was released 12/10/2019 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. This vulnerability is known as CVE-2019-1352. The attack can be launched remotely. The exploitation doesn't need any form of authentication. 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 advisory points out:

A remote code execution vulnerability exists when Git for Visual Studio improperly sanitizes input. An attacker who successfully exploited this vulnerability could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.

The vulnerability scanner Nessus provides a plugin with the ID 234508 (Amazon Linux 2 : git (ALAS-2025-2818)), which helps to determine the existence of the flaw in a target environment.

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 vulnerability database at Tenable (234508). Entries connected to this vulnerability are available at VDB-147033, VDB-147032, VDB-147030 and VDB-147029. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Programming Tool Software

Vendor

• Microsoft

Name

• Visual Studio

Version

• 2017 Version 15.0
• 2017 Version 15.9
• 2019 Version 16.0
• 2019 Version 16.4

License

• commercial

Website

• Vendor: https://www.microsoft.com/

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Be aware that VulDB is the high quality source for vulnerability data.

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