full-disclosure - Fake messages and chat bug in Facebook

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Message-ID: <CAJ9pv0LOxr0hqp08XRMGrDXfT-nxBXvEQRRPG_04wfqOuPK0eQ@mail.gmail.com>
Date: Fri, 29 Jun 2012 21:08:41 +0200
From: Matteo Fabbri <matteo@...scode.org>
To: full-disclosure <full-disclosure@...ts.grok.org.uk>,
	bugtraq <bugtraq@...urityfocus.com>, 
	secalert@...urityreason.com, bugs@...uritytracker.com, 
	vuln <vuln@...unia.com>, vuln@...urity.nnov.ru, news@...uriteam.com, 
	moderators@...db.org, submissions@...ketstormsecurity.org, 
	submit@...ecurity.com, oss-security@...ts.openwall.com
Subject: Fake messages and chat bug in Facebook

Knowing the user registration email is possible to send fake messages /
chat to facebook users.
The only thing required is a fake mail with as the sender the victim
registration  email addressed to the facebook ids followed by "@facebook.com
"

Example:

from victim.email@...mail.com to friend1@...ebook.com, friend2@...ebook.com.
..

Sent email will be shown in Facebook like a private message (or chat if
multiple recipients are specified) sent by the Facebook account of the
victim.

(Previously reported vulnerabilities to Facebook)

Matteo Fabbri

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