Beware of links that ask you to log in through Facebook. The OAuth 2.0 and OpenID modules are vulnerable.

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Article:http://www.cnet.com/news/serious-security-flaw-in-oauth-and-openid-discovered/?ttag=fbwl

OAuth 2.0-is an open standard for authorization. OAuth provides client applications a ‘secure delegated access’ to server resources on behalf of a resource owner. It specifies a process for resource owners to authorize third-party access to their server resources without sharing their credentials. Designed specifically to work with Hypertext Transfer Protocol (HTTP), OAuth essentially allows access tokens to be issued to third-party clients by an authorization server, with the approval of the resource owner, or end-user. The client then uses the access token to access the protected resources hosted by the resource server.OAuth is commonly used as a way for web surfers to log into third party web sites using their Google, Facebook or Twitter passwords, without worrying about their access credentials being compromised.

OpenID- is an open standard that allows users to be authenticated by certain co-operating sites (known as Relying Parties or RP) using a third party service, eliminating the need for webmasters to provide their own ad hoc systems and allowing users to consolidate their digital identities.[1] Users may create accounts with their preferred OpenID identity providers, and then use those accounts as the basis for signing on to any website which accepts OpenID authentication. The OpenID standard provides a framework for the communication that must take place between the identity provider and the OpenID acceptor (the “relying party”).[2] An extension to the standard (the OpenID Attribute Exchange) facilitates the transfer of user attributes, such as name and gender, from the OpenID identity provider to the relying party (each relying party may request a different set of attributes, depending on its requirements).

 

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