ssh: replaced nonexistent key with str(e) in error handling (#2512)

Author: findus

pwnlib/tubes/ssh.py

@@ -450,7 +450,7 @@ def __init__(self, parent, host, port, *a, **kw):
             try:
                 self.sock = parent.transport.open_channel('direct-tcpip', (host, port), ('127.0.0.1', 0))
             except Exception as e:
-                self.exception(e.message)
+                self.exception(str(e))
                 raise
 
             try: