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

References

• GHSA-hf7j-xj3w-87g4
• https://nvd.nist.gov/vuln/detail/CVE-2023-39966
• https://github.com/1Panel-dev/1Panel/releases/tag/v1.5.0