Vulnerability · Published Aug 14, 2020 · Assigned by GitHub_M
CVE-2020-15145Local privilege elevation in Composer-Setup for Windows
Medium 6.7
In plain English
A medium-severity incorrect default permissions in windows-setup from composer. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities).
Official description
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. See: https://msrc-blog.microsoft.com/2018/04/04/triaging-a-dll-planting-vulnerability.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| composer | windows-setup | < 6.0.0 |
Weakness: CWE-276 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:L/I:H/A:N