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Falsifying private messages on Facebook

direccion perfil en facebook

Interesting information published on the OSI website related to falsification of messages on Facebook. As many will know, for a long time we users can have an address of the type @ facebook.com with our name (+ info).

Well, using that address and the main email associated with an account (you can see it in the Information tab of many profiles), it is possible to falsify a private message in such a way that the recipient believes that it is being sent by one of their friends .

Let's see an example, what I do is send a message to my own account @ facebook.com falsifying the sender,in this case by my own e-mail, but I could use that of any friend so that the message seems to be sent from their account. I send the message from an anonymous email service:

The first message is false and as you can see the only difference is a small yellow warning that its origin could not be confirmed. However, this could go unnoticed by many users.

Major problem: warning doesn't always show

In Facebook applications for phones and tablets the warning does not appear, also when the counterfeit email is an address with own domain (example@misitio.com) something that may be happening because the domain is not configured to prevent unlawful uses or Facebook is not doing a good anti-phishing check …

On this last topic, I recommend this series of articles published by Chema Alonso. Also read on Wikipedia about SMTP (the mail transfer protocol) and the SPF and DKIM authentication systems.

Tips:

To prevent them from misleading others under your name, do not post the account's primary email address on the profile. You can hide it from the Information / Contact information / Edit section:

And as always, be very careful with the messages you receive on Facebook, even if they seem to be sent by a trusted friend!

See also: Forge sender in text messages.