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POHow to prevent user to set the value of the session id cookie used by pyramid_beaker?
 

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  1. POHow to prevent user to set the value of the session id cookie used by pyramid_beaker?
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    <p>I have a pyramid application using pyramid_beaker. Here is my configuration:</p> <pre><code># Options For Sessions and Caching: session.type = file session.data_dir = %(here)s/../../data/sessions/data session.lock_dir = %(here)s/../../data/sessions/lock # Session Options: session.key = session_id session.secure = false session.timeout = 3600 session.cookie_expires = true session.cookie_domain = .mydomain.local session.httponly = true # Encryption Options: session.encrypt_key = c]?wvL",ni3J.)d8(e~z8b-9Le=Anh'.QMytBj^Kukfi&lt;79C$Cg22)cX;__xs6?S session.validate_key = \2R('?pL]\Z_8?(o`.?.?^.RF6t*5pCh6PH`~aon%H`PX$;E}"((mu-@(?G&lt;=!:+ # pyramid_beaker specific option session.cookie_on_exception = true </code></pre> <p>And here is the login form view:</p> <pre><code>def login(self): message_html = _('view.login.welcome-message', default='Please log in.') login_url = self.request.route_url('login') login = '' password = '' referrer = self.request.url if referrer == login_url: referrer = self.request.route_url('home') came_from = self.request.POST.get('came_from', referrer) csrf_token = self.request.session.get_csrf_token() if 'form.submitted' in self.request.POST: login = self.request.POST.get('login') password = self.request.POST.get('password') if csrf_token == self.request.POST.get('csrf_token'): if login in USERS: manager = BCRYPTPasswordManager() if manager.check(USERS[login], password): headers = remember(self.request, login) return HTTPFound(location=came_from, headers=headers) message_html = _('view.login.failed-login-message', default='Login failed!') return { 'message_html': message_html, 'url': login_url, 'login': login, 'password': password, 'came_from': came_from, 'csrf_token': csrf_token, } </code></pre> <p>Now, when a user wants to log in, the view renders a form and a cookie <code>session_id</code> is generated. When the user submit a valid form then the cookie’s value is accepted to authenticate the user.</p> <p>Nothing prevent a user to change the cookie’s value before submitting the form. This behavior is apparently a security flaw according to <a href="https://security.stackexchange.com/a/35097/25414">this question</a>.</p> <p>So, how to use pyramid_beaker in order for the server to generate a new session_id value when login succeed instead of taking the one from the cookie?</p>
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      1. POHow to prevent user to set the value of the session id cookie used by pyramid_beaker?
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