The security administrator finds unauthorized tables and records, which were not present before, on a Linux database server. The database server communicates only with one web server, which connects to the database server via an account with SELECT only privileges. Web server logs show the following: 90.76.165.40 - - [08/Mar/2014:10:54:04] "GET calendar.php?create%20table%20hiddenHTTP/1.1" 200 5724 90.76.165.40 - - [08/Mar/2014:10:54:05] "GET ../../../root/.bash_history HTTP/1.1" 2005724 90.76.165.40 - - [08/Mar/2014:10:54:04] "GET index.php?user= Create HTTP/1.1" 200 5724 The security administrator also inspects the following file system locations on the database server using the command 'ls -al /root' drwxrwxrwx 11 root root 4096 Sep 28 22:45 . drwxr-xr-x 25 root root 4096 Mar 8 09:30 .. -rws------ 25 root root 4096 Mar 8 09:30 .bash_history -rw------- 25 root root 4096 Mar 8 09:30 .bash_history -rw------- 25 root root 4096 Mar 8 09:30 .profile -rw------- 25 root root 4096 Mar 8 09:30 .ssh Which of the following attacks was used to compromise the database server and what can the security administrator implement to detect such attacks in the future? (Select TWO).

E. Using input validation, ensure the following characters are sanitized: <>

F. Update crontab with: find / $ -perm -4000 $ -type f -print0 | xargs -0 ls -l | email.sh

G. Implement the following PHP directive: $clean_user_input = addslashes($user_input)

H. Set an account lockout policy

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CAS-003 · Question #143

CAS-003 Question #143: Real Exam Question with Answer & Explanation

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Enterprise Security Operations

Question

The security administrator finds unauthorized tables and records, which were not present before, on a Linux database server. The database server communicates only with one web server, which connects to the database server via an account with SELECT only privileges. Web server logs show the following: 90.76.165.40 - - [08/Mar/2014:10:54:04] "GET calendar.php?create%20table%20hiddenHTTP/1.1" 200 5724 90.76.165.40 - - [08/Mar/2014:10:54:05] "GET ../../../root/.bash_history HTTP/1.1" 2005724 90.76.165.40 - - [08/Mar/2014:10:54:04] "GET index.php?user=<script>Create</script>HTTP/1.1" 200 5724 The security administrator also inspects the following file system locations on the database server using the command 'ls -al /root' drwxrwxrwx 11 root root 4096 Sep 28 22:45 . drwxr-xr-x 25 root root 4096 Mar 8 09:30 .. -rws------ 25 root root 4096 Mar 8 09:30 .bash_history -rw------- 25 root root 4096 Mar 8 09:30 .bash_history -rw------- 25 root root 4096 Mar 8 09:30 .profile -rw------- 25 root root 4096 Mar 8 09:30 .ssh Which of the following attacks was used to compromise the database server and what can the security administrator implement to detect such attacks in the future? (Select TWO).

Options

APrivilege escalation
BBrute force attack
CSQL injection
DCross-site scripting
EUsing input validation, ensure the following characters are sanitized: <>
FUpdate crontab with: find / ( -perm -4000 ) -type f -print0 | xargs -0 ls -l | email.sh
GImplement the following PHP directive: $clean_user_input = addslashes($user_input)
HSet an account lockout policy

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Topics

#privilege escalation#SQL injection#web application attacks#log analysis

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