Vulnerabilities > CVE-2020-0900 - Improper Privilege Management vulnerability in Microsoft products
Attack vector
LOCAL Attack complexity
LOW Privileges required
NONE Confidentiality impact
NONE Integrity impact
PARTIAL Availability impact
PARTIAL Summary
An elevation of privilege vulnerability exists when the Visual Studio Extension Installer Service improperly handles file operations, aka 'Visual Studio Extension Installer Service Elevation of Privilege Vulnerability'.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| Application | 5 |
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Restful Privilege Elevation Rest uses standard HTTP (Get, Put, Delete) style permissions methods, but these are not necessarily correlated generally with back end programs. Strict interpretation of HTTP get methods means that these HTTP Get services should not be used to delete information on the server, but there is no access control mechanism to back up this logic. This means that unless the services are properly ACL'd and the application's service implementation are following these guidelines then an HTTP request can easily execute a delete or update on the server side. The attacker identifies a HTTP Get URL such as http://victimsite/updateOrder, which calls out to a program to update orders on a database or other resource. The URL is not idempotent so the request can be submitted multiple times by the attacker, additionally, the attacker may be able to exploit the URL published as a Get method that actually performs updates (instead of merely retrieving data). This may result in malicious or inadvertent altering of data on the server.
Nessus
| NASL family | Windows : Microsoft Bulletins |
| NASL id | SMB_NT_MS20_APR_VISUAL_STUDIO.NASL |
| description | The Microsoft Visual Studio Products are missing security updates. It is, therefore, affected by multiple vulnerabilities : - An elevation of privilege vulnerability exists when Microsoft Visual Studio updater service improperly handles file permissions. An attacker who successfully exploited this vulnerability could overwrite arbitrary file content in the security context of the local system. (CVE-2020-0899) - An elevation of privilege vulnerability exists when the Visual Studio Extension Installer Service improperly handles file operations. An attacker who successfully exploited the vulnerability could delete files in arbitrary locations with elevated permissions. (CVE-2020-0900) |
| last seen | 2020-05-16 |
| modified | 2020-04-14 |
| plugin id | 135481 |
| published | 2020-04-14 |
| reporter | This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. |
| source | https://www.tenable.com/plugins/nessus/135481 |
| title | Security Updates for Microsoft Visual Studio Products (April 2020) |
| code | |