Noel Jones schrieb:
>At 02:14 PM 12/11/2006, Jakob Curdes wrote:
>
>
>>Update : Even to send the mail including the snippet to the amavis list
>>I had to put myself on the banned_filenames_maps list....
>>How does amavis recognize banned .exe types (not names, there was no
>>attachment...) ? Could that be a file(1) problem ?
>>
>>
>
>Yes, apparently a problem with file(1).
>
>File(1) seems to label any file that starts with LZ as an
>executable. I don't know if this is an actual bug or not.
>
>(try it! way cool!).
>% echo LZ > foo
>% file foo
>foo: MS-DOS executable (built-in)
>
>When amavisd-new split your message into individual mime parts, one
>of the text segments started with LZ. File(1) labeled it as an
>executable and banned that "attachment".
>
>
>
Hmm. The mail was plain ASCII.... no parts. There is only one .txt in
the log, as advertised :
X-Amavis-Alert: BANNED, message contains part:
P=p001,L=1,M=text/plain,T=exe,T=exe-ms
But nevertheless you are right : the TEXT of this mail starts with the
letters LZ.
Bingo.
But that's a bit hard, isn't it ? How could the guessing logic of
file(1) be enhanced or such cases circumvented in another way by amavis
without file type guessing totally ??
Yours,
JC
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