TryHackMe OWASP Injection Room walkthrough

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TryHackMe Advent of cyber Day 9 Task 14 walkthrough


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This post is Walkthrough of OS Command Injection. Demonstrate OS Command Injection and explain how to prevent it on your servers. So I thought this would be helpful for beginners. TryHackMe OWASP Injection Room walkthrough

Task 3# Blind Command Injection

1) Ping the box with 10 packets. What is this command (without IP address)?

ANS: -ping -c 10



2.Try to redirect output to a file on the web server. What alert message do you see appear?

ANS: error



3.Enter “root” into the input and review the alert. What type of alert do you get?

ANS: success







4.Enter “www-data” into the input and review the alert. What type of alert do you get?

ANS: success



5.Enter your name into the input and review the alert. What type of alert do you get?

ANS: error

Task 4# Active Command Injection

1) What strange text file is in the website root directory?

Enter ls command in textbox






ANS: drpepper.txt



2.How many non-root/non-service/non-daemon users are there?






 
ANS: 0




3.What user is this app running as?

Enter whoami command in textbox






ANS: www-data


4.What is the user's shell set as?


perl -e '@x=getpwuid($<); print $x[8]'






ANS: /usr/sbin/nologin




5.What version of Ubuntu is running?

Enter cat /etc/os-release






ANS: 18.04.4



6.Print out the MOTD. What favorite beverage is shown?


Type and enter cat /etc/update-motd.d/00-header







ANS: Dr pepper


 
Now, read flag.txt you will get flag.



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