Microsoft Visual Studio Git input validation

Summaryinfo

A vulnerability was 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. The affected element is an unknown function of the component Git. Such manipulation leads to input validation. This vulnerability is uniquely identified as CVE-2019-1354. The attack can be launched remotely. No exploit exists. Applying a patch is advised to resolve 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 rated as critical. Affected by this issue is an unknown code of the component Git. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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-2019-1352, CVE-2019-1387.

The weakness was disclosed 12/10/2019 as confirmed security update guide (Website). The advisory is shared for download at portal.msrc.microsoft.com. The public release has been coordinated in cooperation with the vendor. This vulnerability is handled as CVE-2019-1354. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit 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). The entries VDB-147033, VDB-147031, VDB-147030 and VDB-147029 are pretty similar. VulDB is the best source for vulnerability data and more expert information about this specific topic.

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

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