Calculat3 M3 | CTF Learn

This walkthrough will demonstrate the simple challenge based on command injection

Calculat3 M3

This is the challenge page we got after visiting the given link.

I provided random input in this calculator and intercepted the request with BurpSuite

I got one parameter "expression" taking the values 



Tried for command injection with ";ls"


Forwarding the above request finally Got the Flag









Popular posts from this blog

TryHackme: Blue Walkthrough

Image
Task 1: Recon After we've connected to the tryhackme network the first task is to enumerate the target. We use Nmap for scanning the target IP. Command Used : nmap -sS -Pn <target-ip> -sS : Scan using TCP SYN scan -Pn : Treats all host as online --skip host discovery Next we used a command to find the vulnerability on the target machine. Command Used : nmap --script vuln <target-ip> --script : Specify the --script option to choose your own scripts to execute by providing categories , script file names, or the name of directories full of scripts you wish to execute. vuln : These scripts check for known vulnerabilites and generally only report results if they are found. Below, we see that nmap is indicating the target may be vulnerable to ms17-010(on the left0 and we can verify this using metasploit. To start Metasploit use command "msfconsole" We start by simply doing a search for ms17-010 Here we use module 2 i.e. exploit/windows
Read more

CTF - Dina : 1.0.1 walkthrough

Image
     Lab Environment  : Attacker’s Machine :  Linux kali 4.13.0-kali1-amd64 #1 SMP Debian 4.13.10-1kali2(2017-11-08) x86_64 GNU/Linux Vulnerable Machine : Dina: 1.0.1 Scanning phase route -n (To know the gateway) i.e 172.16.60.2 arp-scan --local (to know the devices connected to the local network)   Vulnerable machine IP : 172.16.60.154           Using nmap for scanning the IP : nmap -sS -sC -sV  172.16.60.154 We got one open port i.e 80 and http service is active Since the port 80 is open and http service is active then we can open the IP in browser.   Another nmap syntax to know vulnerability if any : nmap --script vuln 172.16.60.154 Now further using dirb for scanning the directories : dirb http://172.16.60.154 Some results are obtained after using dirb .  Opened the http://172.16.60.154/robots.txt and found something interesti
Read more