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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.41%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 8.2 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
- EPSS
- 0.41% probability · 34th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-276
- Affected
- getcomposer/composer-setup
- Source
- security-advisories@github.com
References
- https://github.com/composer/windows-setup/commit/ca9f1435d368e3377e82d60ef0c7b795afa9f804Patch, Third Party Advisory
- https://github.com/composer/windows-setup/security/advisories/GHSA-wgrx-r3qv-332cThird Party Advisory
- https://github.com/composer/windows-setup/commit/ca9f1435d368e3377e82d60ef0c7b795afa9f804Patch, Third Party Advisory
- https://github.com/composer/windows-setup/security/advisories/GHSA-wgrx-r3qv-332cThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.