KLA11748 Multiple vulnerabilities in Microsoft Developer Tools

Multiple vulnerabilities were found in Microsoft Developer Tools. Malicious users can exploit these vulnerabilities to gain privileges, bypass security restrictions.

Below is a complete list of vulnerabilities:

1. An elevation of privilege vulnerability in Microsoft Visual Studio can be exploited remotely to gain privileges.
2. A security feature bypass vulnerability in MSR JavaScript Cryptography Library can be exploited remotely to bypass security restrictions.
3. An elevation of privilege vulnerability in Visual Studio Extension Installer Service can be exploited remotely via specially crafted application to gain privileges.

Original advisories

CVE-2020-0899

CVE-2020-1026

CVE-2020-0900

Related products

Microsoft-Visual-Studio

CVE list

CVE-2020-0899 warning

CVE-2020-1026 critical

CVE-2020-0900 warning

KB list

4540102

Solution

Install necessary updates from the KB section, that are listed in your Windows Update (Windows Update usually can be accessed from the Control Panel)

Impacts

• SB

Security bypass. Exploitation of vulnerabilities with this impact can lead to performing actions restricted by current security settings.

• PE

Privilege escalation. Exploitation of vulnerabilities with this impact can lead to performing by abuser actions, which are normally disallowed for current role.

Affected Products

• Microsoft Visual Studio 2017 version 15.9 (includes 15.1 - 15.8)Microsoft Visual Studio 2015 Update 3Microsoft Visual Studio 2019 version 16.5Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3)Microsoft Research JavaScript Cryptography Library V1.4Microsoft Visual Studio 2019 version 16.0