Av issues
In-Reply-To: <20050311203150.17236.qmail@xxxxxxxxxxxxxxxxxxxxx>
In Local file header if you modify "general purpose bit flag" 7th & 8'th byte
of a zip archive with \x2f ie: "\" F-port, Kaspersky, Mcafee, Norman, Sybari,
Symantec seem to skip the file marking it as clean!!! This was discovered
during the analysis of "Multiple AV Vendor Incorrect CRC32 Bypass
Vulnerability."
Quick/rough conclusion were drawn using www.virustotal.com
poc: http://www.geocities.com/visitbipin/gpbf.zip
Well, tested with F-prot, DrWeb, *Symantec 8.0 long ago... lately verified it
using virustotal.com If you have a long archive coment... in a zip archive
these AV can't detect virus embedded in it. I came to know Symantec 8.1 is
immune to the bug?
POC: http://www.geocities.com/visitbipin/long_coment.zip
regards,
bipin gautam