[Esa-l] Double Extensions fails

[John D. Hardin]

On Wed, 14 Feb 2001, Michael Meltzer wrote:

> I don't understand why to block double extensions ? Is it not
> sufficient to block the (last) extension ?

Where you have a rule like *.VBS that's true. 

If, however, you are not poisoning *.EXE, then you need the
double-extension rule to catch things like EXPLOIT.TXT.EXE

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