Scott Heisler wrote:
To start off with, we are running the following:

Whitebox Linux 3.0ES
Latest Open Protect (Great product!)
ClamAV up to date

That being said, I'm having a problem where legitimate attachments are being
refused because of their name.  Here's what the log showed:

These attachments are only quasi-legit



Apr 12 15:34:22 pop MailScanner[1235]: New Batch: Scanning 1 messages, 114267 bytes Apr 12 15:34:23 pop MailScanner[1235]: MCP Checks: Starting Apr 12 15:34:24 pop MailScanner[1235]: Spam Checks: Starting Apr 12 15:34:32 pop MailScanner[1235]: Virus and Content Scanning: Starting Apr 12 15:34:34 pop MailScanner[1235]: Filename Checks: Found possible filename hiding (_test.LTR.pdf)


A file name beginning with an underbar is not the sort of thing I'd trust. It will also do strange things if it was created on a Windows
machine and sent to an OSX machine.


Special characters in file names are bogus, especially if used
to start the file name.

Further, additional puctuation is bogus.

On many windows systems this file may not display at all or
if it does, it would
display as _test.LTR

rather than _test.LTR.pdf

IN the case of "evilprogram.exe"

nameing it "benign-attachment.pdf.exe"

would show on some windows computers as
"benign-attachment.pdf

and of course, when launched, , , ,

You can rename said file in the quarantene, and then forward it
along,

But lart the sender to use proper file names.

Apr 12 15:34:34 pop MailScanner[1235]: Filename Checks: Found possible
filename hiding (test1-AB.AGR.doc)
Apr 12 15:34:35 pop MailScanner[1235]: Filename Checks: Found possible
filename hiding (test2.AGR.doc)
Apr 12 15:34:35 pop MailScanner[1235]: Other Checks: Found 3 problems
Apr 12 15:34:35 pop MailScanner[1235]: Cleaned: Delivered 1 cleaned messages

As you can see above, it's the "NAME" of the file that's the problem, not
the actual file.  The above files are perfectly fine and virus free.
However, the server is refusing to deliver.  I even added .doc and .pdf to
the filename.rules.conf file and white-listed the sender... still, the files
come through as attached warnings text files only.

HELP!!!!

Thanks.

Scott


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