1Panel is an open source Linux server operation and maintenance management panel. In version 1.4.3, an arbitrary file write vulnerability could lead to direct control of the server. In the `api/v1/file.go` file, there is a function called `SaveContentthat,It `recieves JSON data sent by users in the form of a POST request. And the lack of parameter filtering allows for arbitrary file write operations. Version 1.5.0 contains a patch for this issue.
Affected: Go: github.com/1Panel-dev/1Panel
# Summary An arbitrary file write vulnerability could lead to direct control of the server # Details ## Arbitrary file creation In the api/v1/file.go file, there is a function called SaveContentthat,It recieves JSON data sent by users in the form of a POST request. And the lack of parameter filtering allows for arbitrary file write operations.It looks like this:
- Vulnerable Code
# PoC
- We can write the SSH public key into the /etc/.root/authorized_keys configuration file on the server.
- The server was successfully written to the public key 
- Successfully connected to the target server using an SSH private key.  
As a result, the server is directly controlled, causing serious **harm**
# Impact 1Panel v1.4.3