Hi

I'm getting false positives on the test for MS03-051, frontpage_chunked_overflow.nasl. 
Problem is that it specifically checks for the presence of "Content-Length: 4009" to 
tell the difference between patched and unpatched servers but it seems that this 
length can change if you have customised the error pages that are returned by IIS - at 
least that is how it appears. I've done only limited experimentation to see if there 
is something else that we could use and on a sample of 3 servers, one unpatched and 2 
patched, it appears that we might do better to look for 

HTTP/1.1 100 Continue

since this is returned by both my patched servers and not by the unpatched one. 
However, I don't have a large enough sample of known un/patched machines to base a 
useful decision on :-(

Trevor Hemsley,
Security Specialist,
Atos Origin Ltd,
Whyteleafe,
+44-(0)1883-628139

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