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MessagePosté le: Jeu 11 Jan - 03:16 (2018)    Sujet du message: Facebook Session Key Php Répondre en citant




Facebook Session Key Php
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This is dangerous as it reveals the session identifier in the clear, before redirecting to the HTTPS site. A common mistake is to direct the user to the secure site using HTTP, and then internally redirect to the HTTPS connection after, without changing the session identifier. 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This has to do with the crossdomain communication policy configuration. This attack can be used in many different ways to compromise the users browser and session, and is also usually very easy to exploit. Different parameters will be set depending on the type of Facebook application and what the user is doing with the application. Desktop and iPhone applications should either use a Session proxy ( to create a session and retrieve the session secret, or embed a Web browser in the application in order to use Facebook Connect to start the session. Application canvas. ProductsFacebook LoginSharing on FacebookGamesFacebook App Ads. This allows an attacker to intercept the request to the hosting page, and change the fbsiguser parameter to that of a different Facebook user, who has many goat buddies. Instead of searching the data for bad characters, check that the string matches the expected format based on the type of input. The malicious user can then exploit this vulnerability against other users by creating a request such as the following: . The policy file hosted at example.com should then look like this: . The application secret. Therefore, this API method is not safe for direct use in iPhone applications. The session information is then passed by Facebook to the post-authorize URL as request parameters, or it is set in cookies scoped to the application domain using JavaScript. For example, the application canvas URL for a fictional game called Goatworld might look like this: . This keeps the application secret from being revealed either directly or through reverse engineering of client side binaries. This is due to the fact that SWFs can be downloaded by an attacker and easily decompiled in order to retrieve any secrets used in the ActionScript. alert(document.cookie); . This way, code can be ported to different types of Facebook (and non-Facebook) applications and will still be protected from this class of attack. The application is built using Flash, and runs from a SWF hosted in an iFrame on the application canvas page. Email Sign Up or sign in with Google Facebook How can I prevent the Facebook session key from expiring Ask Question up vote 2 down vote favorite I am developing a Facebook app in Zend Framework. One value included in the Facebook parameters is the signature, which is an MD5 hash of all the parameters concatenated with the application secret. One way such a token can be generated is through the following algorithm: HMACsha1(actionname + secret, sessionid). Therefore, it is important to remember that these applications will have to provide a separate CSRF protection mechanism. However, attackers can control this data to forge or tamper with all of the Facebook parameters sent in the request, excluding the signature. This requirement is in fact a CSRF protection mechanism (as well as adherence to other design principles). As a rule, administrative interfaces should never be available from the internet. This gives the attacker control of the flashvars the SWF uses, and would allow the attacker to, for example, provide a different value for the fbsiguser parameter and other Facebook parameters passed to the SWF. .. Considerations for Flash Applications 5a02188284
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