December 05, 2017
If you receive an email that looks like it’s from one of your friends, just beware! It’s possible that the email has been sent by someone else in an attempt to compromise your system.
A security researcher has discovered a collection of vulnerabilities in more than 30 popular email client applications that could allow anyone to send spoofed emails bypassing anti-spoofing mechanisms.
Discovered by security researcher Sabri Haddouche, the set of vulnerabilities, dubbed MailSploit, affects Apple Mail (macOS, iOS, and watchOS), Mozilla Thunderbird, several Microsoft email clients, Yahoo Mail, ProtonMail, and others.
Although most of these affected email client applications have implemented anti-spoofing mechanisms, such as DKIM and DMARC, MailSploit takes advantage of the way email clients and web interfaces parse “From” header.
Email spoofing is an old-school technique, but it works well, allowing someone to modify email headers and send an email with the forged sender address to trick recipients into believing they are receiving that email from a specific person.