![]() ![]() Through examination of the password change process, he found that an attacker can’t Change the victim password without answering the Security Questions set by user, Also the user himself can’t change the security questions without entering the password!ģ- ByPassing the Security Questions Change: The application generates a valid “Auth” token for a logged-out user! At this point the attacker Can CSRF “almost” any request on behave of this user. Upon Further Investigation, We have found out that an Attacker can obtain the CSRF Auth which can be valid for ALL users, by intercepting the POST request from a page that provide an Auth Token before the Logging-in process, check this page for the magical CSRF Auth “”. The CSRF Auth verifies every single request of that user, So what If an attacker “not logged in” tries to make a “send money” request then PayPal will ask the attacker to provide his email and password, The attacker will provide the “Victim Email” and ANY password, Then he will capture the request, The request will contain a Valid CSRF Auth token Which is Reusable and Can authorise this specific user requests. Hmm, it seems interesting but still not exploitable, as there is no way for an attacker to get the “Auth” value from a victim session. The CSRF token “that authenticate every single request made by the user” which can be also found in the request body of every request with the parameter name “Auth” get changed with every request made by user for security measures, but after a deep investigation I found out that the CSRF Auth is Reusable for that specific user email address or username, this means If an attacker found any of these CSRF Tokens, He can then make actions in the behave of any logged in user. ![]() Yasser successfully bypassed the PayPal security to generate exploit code for targeted attacks. Yasser tells that How the security breach in paypal and hackers can hijack account just single click. One year after acquiring Braintree, PayPal introduced its “One Touch” service, which permit users to pay with a one-touch option on participating merchants websites or apps.įor more information, news or updates you can access the official website of the PayPal, so any of you can better understand the operating principle, ask for opinions or find answers to any questions about PayPal.Mr. The PayPal app is available online or at the iTunes App Store and Google Play, it’s also available to be accessed from a desktop browser. In 2011, PayPal announced that it would begin moving its business offline so that customers can make payments via PayPal in stores. The company continued to build its Merchant Services department, providing e-payments for retailers on eBay. An important step is that the first version of the PayPal electronic payments system was launched in 1999. It should be mentioned that this company had no success with that business model, however, so switched its focus to a digital wallet, a real innovation for those times. PayPal was initially established by Max Levchin, Peter Thiel, and Luke Nosek in December 1998 as Confinity, a company that developed security software for handheld devices. PayPal charges a fee in exchange for benefits such as one-click transactions and password memory. One good thing to know is that the company operates as a payment processor for online vendors, auction sites, content creators, freelancers and many other commercial users. ![]() is an American company functioning an online payments system in most countries which allow online money transfers and serves as an electronic alternative to traditional paper methods like money orders, checks and so on. ![]()
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