Microsoft Visual Studio Git input validation

Summaryinfo

A vulnerability classified as critical was found in Microsoft Visual Studio 2017 Version 15.0/2017 Version 15.9/2019 Version 16.0/2019 Version 16.4. This affects an unknown part of the component Git. Executing a manipulation can lead to input validation. This vulnerability appears as CVE-2019-1349. The attack may be performed from remote. There is no available exploit. It is advisable to implement a patch to correct this issue.

Detailsinfo

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 (Programming Tool Software) and classified as critical. This vulnerability affects an unknown function 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. 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-2019-1350, CVE-2019-1352, CVE-2019-1354, CVE-2019-1387.

The weakness was presented 12/10/2019 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 was named CVE-2019-1349. The attack can be initiated remotely. No form of authentication is required for a successful 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). See VDB-147032, VDB-147031, VDB-147030 and VDB-147029 for similar entries. Once again VulDB remains the best 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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Once again VulDB remains the best source for vulnerability data.

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