A demo project for forging fake Flask session by SSTI(server-side template injection) - u17zl/SSTI-flask-session-forge

cs = s.get(url + "control-robot", cookies = {"session":"new cookie"}) ... .eJwljktqBDEMRO_idRaWZf3mMo0tS8wQSKB7ZhVy93HIsgrq1fspR55x3cvteb7ioxyPVW5lOKSvyObSsJFop2UgcwWxatPJUNlGtiqrsggKB5pMwzqkcqWmXLUbZndj8ole2av4Wg07zdFtuBNHThhsRLD5DhCOfXOjbJHXFee_Dezo15nH8_szvv6K5P1ludh0WuyVkrqCJklrAjhw-_dRft9jlD5c.YZax6g.tS__qotCbmnLiJgutCjo5R-q3o0 · I assume this is in jwt format, thus I used flask decode which gives me following output:

conda-forge/flask-session · Community · Server-side session support for Flask · Copied fromcf-staging / flask-session · Overview · Files 8 · Labels 1 · Badges · Versions · 0.8.0 · To install this package, run one of the following: $conda install conda-forge::flask-session ·

A demo project for forging fake Flask session by SSTI(server-side template injection) - SSTI-flask-session-forge/session_cookie_manager.py at master · u17zl/SSTI-flask-session-forge

May 1, 2020 - Again with flask-unsign we set our parameters and add the secret key to create the cookie: ... And now we have the new forged cookie. We can now replace our existing session cookie data with this and it should read ‘flagship’:True giving us access to the page.

A conda-smithy repository for flask-session. Contribute to conda-forge/flask-session-feedstock development by creating an account on GitHub.

If you have a SECRET_KEY of the Flask application, you can forge your own session= cookies.

I'm trying to forge a cookie using the secret key. Here is my code: Copyclass App(object): def __init__(self): self.secret_key = None app = App() app.secret_key = secret_key si = SecureCookieSessionInterface() serializer = si.get_signing_serializer(app) f = open('new','wb') session = serializer.dump(ast.Assertliteral_eval(PAYLOAD),f) f.close() f = open('new','rb') print f.read()

July 24, 2025 - The Goal Your objective is to forge a session with {"very_auth":"admin"}. To do this: Use a tool like flask-unsign to crack the secret key (since it's weak and from a known list).

Decode and forge Flask/itsdangerous session cookies. Paste a cookie value with the SECRET_KEY to reveal the payload and verify the HMAC signature, or generate a valid signed cookie for CTF challenges.

April 20, 2020 - ``` $ flask-unsign --sign --secret password1 --cookie "{'flagship': True, 'username': 'toto'}" eyJmbGFnc2hpcCI6dHJ1ZSwidXNlcm5hbWUiOiJ0b3RvIn0.Xp2TRQ.XlXCKJYANDb9ghp5ms_fKQhTkVY ``` Using Burp repeater we modify our cookie to get the flag · ``` GET /flag HTTP/1.1 Host: cookie-forge.cha.hackpack.club Cookie: session=eyJmbGFnc2hpcCI6dHJ1ZSwidXNlcm5hbWUiOiJ0b3RvIn0.Xp2TRQ.XlXCKJYANDb9ghp5ms_fKQhTkVY Upgrade-Insecure-Requests: 1 ·

February 9, 2025 - The challenge provides a Flask-based “Birthday Card Generator” website. The goal is to exploit a Server-Side Template Injection (SSTI) vulnerability to leak the Flask secret key, forge a malicious admin session cookie, and retrieve the flag from the /admin/report endpoint.

pixi add flask-session · conda install -c https://prefix.dev/conda-forge flask-session · flask-session package does not contain a description · Loading chart data... 0.8.0 · BSD-3-Clause · noarch · 2 years ago · github.com/conda-forge/flask-session-feedstock ·

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A conda-smithy repository for flask-session. Contribute to conda-forge/flask-session-feedstock development by creating an account on GitHub.

September 24, 2024 - Flask applications use an application key to encrypt and sign various data, including session cookies and other sensitive information. When a weak or easily guessable application key is used, it compromises the security of the entire application. Attackers can potentially decrypt sensitive data, forge valid session cookies, or even execute remote code in some scenarios.

April 4, 2016 - The client has no way to forge a session with a random email (unless the server's secret key is leaked), so security is not a concern. The only thing is that the email will be stored without encryption on the session.