Add Jython2 gadget

[ykoster]

This version of Jython2 executes a command through os.system(). Based on Jython1 from @pwntester & @cschneider4711

[frohoff]

Sorry for taking so long to reply. Can you confirm whether this works on Windows? The Windows appveyor builds seem to be failing.

https://ci.appveyor.com/project/frohoff/ysoserial/build/job/u0ruvvdc4beehxlu

[ykoster]

Hi @frohoff, it was a bit of a struggle to compile, but the build works for me on Windows 10 with Oracle JRE 1.7.0_80.

[frohoff]

Are you able to confirm it achieves command execution on windows? Does the test pass on windows on your machine?

[ykoster]

Sorry, I misread your original question. I can confirm that command execution works on Windows.

[ykoster]

I'm not sure why AppVeyor fails; from the 1.8.0 output it seems to me that PowerShell did run:

new-item : Illegal characters in path.
At line:1 char:1
+ new-item -type file C:\Users�ppveyor\AppData\Local\Temp�\ysoserial-te ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
mentException
    + FullyQualifiedErrorId : System.ArgumentException,Microsoft.PowerShell.Co 
   mmands.NewItemCommand

On a side note, this pull request pretty much does the same and the build doesn't fail:
Add new jython gadget chains. #153

[frohoff]

It looks like the windows issue is probably is caused by a bug in the RCE test harness that doesn't handle spaces in the temp dir. I'll try to fix that and then get this merged.