On Tue, 12 Sep 2017 21:49:17 -0800
kristen R <kris...@atmyhome.org> wrote:
> 
> The file is an image. Open the image up and then scan. Does  clamscan
> open images itself and then preform a scan?
> 
> 


YES! It scans *inside* ZIP, TAR, RAR etc.

(Maybe these have a 4 GB limit too?)

If ClamAV can't handle files bigger than 4 GB, then it isn't very
suitable for modern computing. Most computers sold today support 64-bit
addressing. Windows 7, 8 and 10 can be either 32 or 64 bit, as can Mac
OSX. And of course Linux started supporting files over 4 GB many years
ago -- even before it supported 64-bit memory addressing.

Finally, DVDs have held more than 4 GB almost forever, Blu-Ray is lots
bigger, and individual digital video files can easily exceed 4 GB
(especially HD or UHD source files, which have little or no compression).

P.S. The usual way to "open" an ISO is to "mount" it. This operation is
usually performed at a high privilege level (e.g. root) which means
that if a malicious ISO were able to exploit a vulnerability in the
code which decodes the ISO metadata/headers (buffer overflow comes to
mind) it could cause major system damage.
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