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rapid7 / metasploit-framework

Metasploit Framework
https://www.metasploit.com/
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Pyload RCE (CVE-2024-39205) with js2py sandbox escape (CVE-2024-28397) #19640

Closed jheysel-r7 closed 1 week ago

jheysel-r7 commented 1 week ago

This add an exploit module for an RCE vulnerability in Pyload.

CVE-2024-28397 is sandbox escape in js2py (<=0.74) which is a popular python package that can evaluate javascript code inside a python interpreter. The vulnerability allows for an attacker to obtain a reference to a python object in the js2py environment enabling them to escape the sandbox, bypass pyimport restrictions and execute arbitrary commands on the host. At the time of writing no patch has been released, version 0.74 is the latest version of js2py which was released Nov 6, 2022.

CVE-2024-39205 is an remote code execution vulnerability in Pyload (<=0.5.0b3.dev85) which is an open-source download manager designed to automate file downloads from various online sources. Pyload is vulnerable because it exposes the vulnerable js2py functionality mentioned above on the /flash/addcrypted2 API endpoint. This endpoint was designed to only accept connections from localhost but by manipulating the HOST header we can bypass this restriction in order to access the API to achieve unauth RCE.

Verification

List the steps needed to make sure this thing works

  1. Start a vulnerable instance of pyLoad using docker
  2. Start msfconsole
  3. Run: use exploit/linux/http/pyload_js2py_cve_2024_39205
  4. Set the RHOST, LHOST PAYLOAD and payload associated options
  5. Run: run
smcintyre-r7 commented 1 week ago

Release Notes

This adds an exploit module that leverages CVE-2024-39205 which is an unauthenticated RCE in Pyload.