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gregsohl #1
CF Potential Denial of Service issue?
CFMX 6.1 I've seen various discussions around the internet about CFFILE's
memory consumption when used for file upload. There is a Macromedia technote
([url]http://www.macromedia.com/go/tn_17018[/url]) on the subject, though it's last edited
date is quite old. In my testing, this memory consumption situation doesn't
appear to be CFFILE specific at all. Simply submitting a POST with a <input
type='file'> to any CFM page triggers saving the file to the temporary area and
hence the associated memory consumption to occur. This indicates to me that
someone could perform a DOS attack on any CF site simply by doing malicious
POSTs with large file attachments. Why is CF, a product at its stage of
maturity, still using so much memory (1.5 - 2x + the size of the uploaded file)
for this type of operation?? It appears to be CF specific, as similar actions
to a JSP page (using JRun) do not have the same affect. Can someone at
Macromedia please address this - or tell me I'm stupid and point me in the
right direction. Thx. Greg
gregsohl Guest
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