Researchers at safety firm Qualys found 21 vulnerabilities in Exim, a well-liked mail server, which could be chained to acquire “a full distant unauthenticated code execution and acquire root privileges on the Exim Server.”.
Exim is a mail switch agent (MTA), chargeable for receiving and forwarding e mail messages. It runs totally on Unix or Linux and can also be the principle MTA used on cPanel.
In accordance 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 vital vulnerabilities found through a code audit, 10 of which could 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 packages, modify information, 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 shoppers working exim to use the updates for this as quickly as potential.
For patrons working cPanel, so long as you may have utilized all updates obtainable, this could then be utilizing the most recent model of Exim that isn’t weak.