fail to run android root disable

[0xm1nt]

[tab] for command suggestions
com.pentestmobile.approot (run) on (Android: 10) [usb] # android root disable
A Frida agent exception has occurred.
Error: Java API not available
at _checkAvailable (/src/index.js:13470)
at perform (/src/index.js:13336)
at (/src/index.js:13544)
at Promise (native)
at wrapJavaPerform (/src/index.js:13545)
at testKeysCheck (/src/index.js:20885)
at disable2 (/src/index.js:21127)
at androidRootDetectionDisable (/src/index.js:21321)
at call (native)
at handleRpcMessage (/frida/runtime/message-dispatcher.js:39)
at handleMessage (/frida/runtime/message-dispatcher.js:25)

Python stack trace: Traceback (most recent call last):
File "C:\Users\mint\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0\LocalCache\local-packages\Python313\site-packages\objection\console\repl.py", line 362, in run
self.run_command(document)
~~~~~~~~~~~~~~~~^^^^^^^^^^
File "C:\Users\mint\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0\LocalCache\local-packages\Python313\site-packages\objection\console\repl.py", line 170, in run_command
exec_method(arguments)
~~~~~~~~~~~^^^^^^^^^^^
File "C:\Users\mint\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0\LocalCache\local-packages\Python313\site-packages\objection\commands\android\root.py", line 13, in disable
api.android_root_detection_disable()
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
File "C:\Users\mint\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0\LocalCache\local-packages\Python313\site-packages\frida\core.py", line 180, in method
return script._rpc_request(request, data, **kwargs)
~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\mint\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0\LocalCache\local-packages\Python313\site-packages\frida\core.py", line 86, in wrapper
return f(*args, **kwargs)
File "C:\Users\mint\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.13_qbz5n2kfra8p0\LocalCache\local-packages\Python313\site-packages\frida\core.py", line 497, in _rpc_request
raise result.error
frida.core.RPCException: Error: Java API not available
at _checkAvailable (/src/index.js:13470)
at perform (/src/index.js:13336)
at (/src/index.js:13544)
at Promise (native)
at wrapJavaPerform (/src/index.js:13545)
at testKeysCheck (/src/index.js:20885)
at disable2 (/src/index.js:21127)
at androidRootDetectionDisable (/src/index.js:21321)
at call (native)
at handleRpcMessage (/frida/runtime/message-dispatcher.js:39)
at handleMessage (/frida/runtime/message-dispatcher.js:25)

com.pentestmobile.approot (run) on (Android: 10) [usb] #
some1 knows how to fix it?
jdk 17
frida server running

[retkoussa]

+1 bump - same issue

User: ~ % objection -n com.appname.123456 start

     _   _         _   _
 ___| |_|_|___ ___| |_|_|___ ___
| . | . | | -_|  _|  _| | . |   |
|___|___| |___|___|_| |_|___|_|_|
      |___|(object)inject(ion) v1.12.2

     Runtime Mobile Exploration
        by: @leonjza from @sensepost

[tab] for command suggestions
com.appname.123456 (run) on (Android: 14) [usb] # android root
disable
A Frida agent exception has occurred.
Error: Java API not available
    at _checkAvailable (/src/index.js:13470)
    at perform (/src/index.js:13336)
    at <anonymous> (/src/index.js:13544)
    at Promise (native)
    at wrapJavaPerform (/src/index.js:13545)
    at testKeysCheck (/src/index.js:20885)
    at disable2 (/src/index.js:21127)
    at androidRootDetectionDisable (/src/index.js:21321)
    at call (native)
    at handleRpcMessage (/frida/runtime/message-dispatcher.js:39)
    at handleMessage (/frida/runtime/message-dispatcher.js:25)

Python stack trace: Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.14/lib/python3.14/site-packages/objection/console/repl.py", line 362, in run
    self.run_command(document)
    ~~~~~~~~~~~~~~~~^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.14/lib/python3.14/site-packages/objection/console/repl.py", line 170, in run_command
    exec_method(arguments)
    ~~~~~~~~~~~^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.14/lib/python3.14/site-packages/objection/commands/android/root.py", line 13, in disable
    api.android_root_detection_disable()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/Library/Frameworks/Python.framework/Versions/3.14/lib/python3.14/site-packages/frida/core.py", line 180, in method
    return script._rpc_request(request, data, **kwargs)
           ~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Library/Frameworks/Python.framework/Versions/3.14/lib/python3.14/site-packages/frida/core.py", line 86, in wrapper
    return f(*args, **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/3.14/lib/python3.14/site-packages/frida/core.py", line 497, in _rpc_request
    raise result.error
frida.core.RPCException: Error: Java API not available
    at _checkAvailable (/src/index.js:13470)
    at perform (/src/index.js:13336)
    at <anonymous> (/src/index.js:13544)
    at Promise (native)
    at wrapJavaPerform (/src/index.js:13545)
    at testKeysCheck (/src/index.js:20885)
    at disable2 (/src/index.js:21127)
    at androidRootDetectionDisable (/src/index.js:21321)
    at call (native)
    at handleRpcMessage (/frida/runtime/message-dispatcher.js:39)
    at handleMessage (/frida/runtime/message-dispatcher.js:25)

[IPMegladon]

Which version of Frida are you using? (also make sure client & server match)

[0xm1nt]

17.5.1
ye it matches

[IPMegladon]

If you can test whether you get the same issue when using Java.perform() directly in Frida that would be appreciated.
Its weird given Java.available should be true at this point.

I am not able to replicate it my side, within objection this is the only thing I can think is responsible for the issue. Perhaps just rerun objection with debug -d flag, e.g. objection -d -n com.appname.123456 start. It should be spitting out a
agent/src/android/lib/libjava.ts:4-11

let Java: typeof Java_bridge;
// Compatibility with frida < 17
if (globalThis.Java) {
  send(c.blackBright("Pre-v17 version of Frida detected. Attempting to use old bridge interface."))
  Java = globalThis.Java   
} else {
  Java = Java_bridge
}

[0xm1nt]

The app is vulnerable and it's possible to exploit it using a Frida script with Java.perform().
Java.perform(function() {
var bypass = Java.use("com.example.rootcheckapp.MainActivity")
bypass.isRooted.implementation = function() {
return false;
}
})

PS C:\Users\mint\Desktop\Code> frida -U -f com.example.rootcheckapp -l root.js
____
/ _ | Frida 17.5.1 - A world-class dynamic instrumentation toolkit
| (| |
> _ | Commands:
// |_| help -> Displays the help system
. . . . object? -> Display information about 'object'
. . . . exit/quit -> Exit
. . . .
. . . . More info at https://frida.re/docs/home/
. . . .
. . . . Connected to Phone (id=xxx.xxx.xxx.xx:5555)
Spawned com.example.rootcheckapp. Resuming main thread!
[Phone::com.example.rootcheckapp ]->

it's very weird that I can't explore this with objection.