CVE-2020-15145 – Local privilege elevation in Composer-Setup for Windows

https://notcve.org/view.php?id=CVE-2020-15145

In Composer-Setup for Windows before version 6.0.0, if the developer's computer is shared with other users, a local attacker may be able to exploit the following scenarios. 1. A local regular user may modify the existing `C:\ProgramData\ComposerSetup\bin\composer.bat` in order to get elevated command execution when composer is run by an administrator. 2. A local regular user may create a specially crafted dll in the `C:\ProgramData\ComposerSetup\bin` folder in order to get Local System privileges. See: https://itm4n.github.io/windows-server-netman-dll-hijacking. 3. If the directory of the php.exe selected by the user is not in the system path, it is added without checking that it is admin secured, as per Microsoft guidelines. • https://github.com/composer/windows-setup/commit/ca9f1435d368e3377e82d60ef0c7b795afa9f804 https://github.com/composer/windows-setup/security/advisories/GHSA-wgrx-r3qv-332c • CWE-276: Incorrect Default Permissions •