As always, I appreciate your input. I feared this was going to be your
response. Most of these erroneously blocked mails come from big providers
(like travel agency confirmation pdfs). I'm surprised that they have
javascript, but they do. We've been adding exceptions, which isn't fun,
but is okay.
Do you think there's a way you could change UserAttach, or add another
exception list, to let us use variables like %LEVEL2% to indicate all of
the Level 2 defined types and then use + or - notation to add or remove
types? That would let us change Level2 in the GUI and not have to then go
through all of the UserAttach exceptions and update them too.
So something like this:
Our Level 1 is
exe\-bin|url|ade|adp|asx|bas|bat|dot|dotx|xlt|xlts|bin|chm|cmd|com|cpl|crt|dbx|dll|exe|hlp|hta|htb|inf|ifs|isp|js|jse|lnk|mda|mdb|mde|mdz|mht|msc|msi|msp|mst|nch|pcd|pif|prf|ps1|reg|scf|scr|sct|shb|shs|vb|vbe|vbs|vba|wms|wsc|wsh|rar|dotm|docm|xlsm|pptm
Our Level 2 is
(exe\-bin|url|ade|adp|asx|bas|bat|dot|dotx|xlt|xlts|bin|chm|cmd|com|cpl|crt|dbx|dll|exe|hlp|hta|htb|inf|ifs|isp|js|jse|lnk|mda|mdb|mde|mdz|mht|msc|msi|msp|mst|nch|pcd|pif|prf|ps1|reg|scf|scr|sct|shb|shs|vb|vbe|vbs|vba|wms|wsc|wsh|rar|dotm|docm|xlsm|pptm).zip
This user needs to ALLOW office macros
ouru...@ourcharity.org => block => *exe\-bin|:MSOM|*
url|ade|adp|asx|bas|bat|dot|dotx|xlt|xlts|bin|chm|cmd|com|cpl|crt|dbx|dll|exe|hlp|hta|htb|inf|ifs|isp|js|jse|lnk|mda|mdb|mde|mdz|mht|msc|msi|msp|mst|nch|pcd|pif|prf|ps1|reg|scf|scr|sct|shb|shs|vb|vbe|vbs|vba|wms|wsc|wsh|rar|dotm|xlsm
My proposal would be to instead have something like
ouru...@ourcharity.org => block => %Leve2%|+:MSOM (add the :MSOM
exception)
Just a thought. Thanks
On Thu, Aug 10, 2017 at 3:16 AM, Thomas Eckardt <thomas.ecka...@thockar.com>
wrote:
> One line of bad JS code is enough to completely destroy an IT environment
> (petabytes of data and thousands of machines in some minutes).
> Such code can be encrypted, encoded and obviuscated in any not thinkable
> way.
>
> It is simply not possible to classify JS code or to know how any of the
> hundreds PDF viewers will act on such code.
>
> Accepting executable code from a sender is not a matter of classification
> - it is a matter of TRUST ! (I trust no one without human code verification)
>
> Define ':CERTPDF' and request the sender to sign there PDF files.
>
> For now, assp only checks that there is a certificated. In a future
> release the certificates may be verified and/or compared to a provided
> CERT-list.
>
>
>
> Thomas
>
>
>
>
>
> Von: K Post <nntp.p...@gmail.com>
> An: ASSP development mailing list <assp-test@lists.sourceforge.net>
> Datum: 09.08.2017 15:54
> Betreff: [Assp-test] More PDF Javascript catches
> ------------------------------
>
>
>
>
> I really like the javascript detection in PDF files, but I've seen lots of
> false positives too.
>
> I keep meaning to report it. One file that just got caught has only 2
> lines of javascript
>
> 6 0 obj
> <</S/JavaScript/JS(this.zoom = 100;)>>
> endobj
>
>
> and
>
> 33 0 obj
> <</Dests 31 0 R/JavaScript 32 0 R>>
> endobj
>
> Is there anything more that could be done to be less aggressive but still
> give us good protection?
>
> Thanks! ----------------------------------------------------
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> *******************************************************
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