Exim mail server: Vulnerabilities

Researchers at safety firm Qualys found 21 vulnerabilities in Exim, a well-liked mail server, which will be chained to acquire “a full distant unauthenticated code execution and achieve root privileges on the Exim Server.”.

Exim is a mail switch agent (MTA), answerable for receiving and forwarding e mail messages. It runs totally on Unix or Linux and can be the primary MTA used on cPanel.

In line with one latest survey almost 60 per cent of mail servers seen on the web use Exim.

The Qualys researchers have now reported on 21 vital vulnerabilities found by way of a code audit, 10 of which will be exploited remotely.

Profitable exploitation of those vulnerabilities would permit a distant attacker to realize full root privileges on the goal server and execute instructions to put in applications, modify knowledge, and create new accounts.

All variations earlier than Exim-4.94.2 are weak, and safety updates have been launched for the vulnerabilities on 04/05/2021.

We might strongly advise all purchasers working exim to use the updates for this as quickly as potential.

For patrons working cPanel, so long as you’ve utilized all updates out there, this could then be utilizing the newest model of Exim that isn’t weak.