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), liable for receiving and forwarding e mail messages. It runs totally on Unix or Linux and can be the primary MTA used on cPanel.

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

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

Profitable exploitation of those vulnerabilities would enable 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 susceptible, and safety updates have 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 doable.

For purchasers operating cPanel, so long as you have got utilized all updates obtainable, this could then be utilizing the most recent model of Exim that’s not susceptible.