Hi,
Thank you for making this clear to me. My guess was that 466 value for max_compression_ratio is somehow out of range. Also, Daniel thanks for the logic bomb tutorial ;)
Regards, Ovidiu
Daniel Lord wrote:
Hi Ovidiu,
On Fri, Aug 27, 2004 at 11:50:16AM +0200, Tomasz Papszun wrote:
On Thu, 26 Aug 2004 at 20:22:34 +0300, Ovidiu Bivolaru wrote:
I'm using ClamAV 0.75.1 and I encounter one of the Oversized.zip issues. I've read a few threads about this issue and I've learned that maxcompressionratio could be 200 ~ 99.5% compression.
I have a zip file which reports a compression ratio of 466. Is this possible ?
[...]
Of course. It depends just on the kind of compressed data.
just try: (need: dd, zip, zipinfo, bc, ls, /dev/zero :)
dd if=/dev/zero of=data bs=1k count=200 zip data.zip data
zipinfo data.zip Archive: data.zip 355 bytes 1 file -rw-r--r-- 2.3 unx 204800 bx defN 27-Aug-04 13:25 data 1 file, 204800 bytes uncompressed, 215 bytes compressed: 99.9%
ls -l data* ... 204800 27. Aug 13:25 data ...... 355 27. Aug 13:25 data.zip
echo "204800/215; 204800/355" | bc
So such archives are possible. _BUT_ I wouldn't try to feed my virus scanner with something like that :)
Greetings Daniel
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