How to reproduce the bug:

In Prewikka, when my server is subject to bruteforce attacks, it does ssh logins failures and prelude-correlator make a high risk assessment titled "Brute Force Attack". However when I want details and click on the alert, I get Prewikka crashing.

What the error is:

object does not support item assignment

Traceback (most recent call last):
  File "/usr/lib/python2.4/site-packages/prewikka/Core.py", line 307, in process
    getattr(view_object, view[[handler]])()
  File "/usr/lib/python2.4/site-packages/prewikka/views/alertlisting.py", line 1075, in render
    total = self._setMessages(criteria)
  File "/usr/lib/python2.4/site-packages/prewikka/views/alertlisting.py", line 1033, in _setMessages
    dataset = self._setMessage(message, ident)
  File "/usr/lib/python2.4/site-packages/prewikka/views/alertlisting.py", line 673, in _setMessage
    msg.setMessage(message, ident)
  File "/usr/lib/python2.4/site-packages/prewikka/views/alertlisting.py", line 615, in setMessage
    self.setMessageInfo(message, ident)
  File "/usr/lib/python2.4/site-packages/prewikka/views/alertlisting.py", line 582, in setMessageInfo
    self.setMessageCorrelationAlertInfo(message, ident)
  File "/usr/lib/python2.4/site-packages/prewikka/views/alertlisting.py", line 566, in setMessageCorrelationAlertInfo
    ca_params[[timeline_unit]] = "unlimited" 
[[TypeError]]: object does not support item assignment