q# wrote:
On Wed, Jul 27, 2005 at 10:46:42AM -0700, [EMAIL PROTECTED] wrote:

Is there currently a work around to avoid this situation? Is anyone just
rejecting messages with a zip that has a zip header that says the file
size is Zero when uncompressed?


Could you be more specific, I don't understand what you mean. You want
reject zip files with empty files inside, yes? Like this:

$ unzip -vl /tmp/empty.zip
Archive:  /tmp/empty.zip
 Length   Method    Size  Ratio   Date   Time   CRC-32    Name
--------  ------  ------- -----   ----   ----   ------    ----
       0  Stored        0   0%  07-27-05 19:58  00000000  empty.txt
--------          -------  ---                            -------
       0                0   0%                            1 file


I believe the OP is referring to a new technique being used by virus writers where the email has a zip attachment which APPEARS to be 0 bytes (in the zip header) but when uncompressed, the file is in fact not 0 bytes. There was a recent article about this somewhere but i am unable to find the link ATM.

-Jim
_______________________________________________
http://lurker.clamav.net/list/clamav-users.html

Reply via email to