Exim mail server: Vulnerabilities

Researchers at safety firm Qualys found 21 vulnerabilities in Exim, a well-liked mail server, which may 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), chargeable for receiving and forwarding electronic mail messages. It runs totally on Unix or Linux and can also be the primary MTA used on cPanel.

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

The Qualys researchers have now reported on 21 important vulnerabilities found through a code audit, 10 of which may be exploited remotely.

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

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

We’d strongly advise all shoppers operating exim to use the updates for this as quickly as attainable.

For purchasers operating cPanel, so long as you’ve got utilized all updates out there, this could then be utilizing the most recent model of Exim that isn’t weak.