Catch specially crafted jpeg?
 

I want to protect our network from specially crafted jpegs that can crash some applications.
Our mails e.g. are filtered through clamav, but that does not seem to catch such jpegs.

However, I found some binary patters on the internet by which those jpegs could be identified.

If I could find a command-line tools that can do "hexadecimal regex" matching on binary files, then I could use that in our mail server to catch those jpegs.

Is there a command line tool that can do a hexadecimal search inside binary files?

You could use a simple Perl construct, like the Easynews team did here to find that new JPEG virus.


Håkan