SMTP Smuggling-Fallout – or: Who should patch now? What and how?
This winter season had administrators of of mail servers stirring between christmas cake and new year’s toasts, as the „SMTP Smuggling“ security leak made rounds. It was published on 2023-12-18 by Timo Longin, SEC Consult and presented two weeks later at the (in)famous 37th Chaos Communication Congress (37C3) in Hamburg. The talk has been recorded and is available at media.ccc.de.
We took a look at the vulnerability and estimated who needs to act now to mitigate it.