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News > Attacks & Threats > Microsoft Exchange Flaw Lets Attackers Spoof Any Email Address

Microsoft Exchange Flaw Lets Attackers Spoof Any Email Address

“Ghost-Sender" is the result of a widespread misconfiguration, according to researchers, and evidence indicates it's being actively abused in the wild.

A weakness in certain configurations of Microsoft Exchange enables attackers to send an email from any user to a vulnerable organization.

That's according to Swiss cybersecurity firm InfoGuard, which published research today concerning a new vulnerability it described as "Ghost-Sender." Specifically, organizations that use Exchange Online or on-premises in hybrid mode with a third-party mail server or spam filter as its mail exchange (MX) record are vulnerable to this level of spoofing. MX Records are a type of DNS record that directs email messages to the specific server responsible for an organization's domain. More here

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