Exim mail server: Vulnerabilities

Researchers at safety firm Qualys found 21 vulnerabilities in Exim, a preferred 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 electronic mail messages. It runs totally on Unix or Linux and can also be the principle MTA used on cPanel.

In response to one current survey practically 60 per cent of mail servers seen on the web use Exim.

The Qualys researchers have now reported on 21 important vulnerabilities found by way of a code audit, 10 of which may 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 susceptible, and safety updates have been launched for the vulnerabilities on 04/05/2021.

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

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