New Critical Exim Flaw Exposes Email Servers to Remote Attacks — Patch Released

exim email server security

A critical security vulnerability has been discovered and fixed in the popular open-source Exim email server software, which could allow a remote attacker to simply crash or potentially execute malicious code on targeted servers.

Exim maintainers today released an urgent security update—Exim version 4.92.3—after publishing an early warning two days ago, giving system administrators an early head-up on its upcoming security patches that affect all versions of the email server software from 4.92 up to and including then-latest version 4.92.2.

Exim is a widely used, open source mail transfer agent (MTA) developed for Unix-like operating systems like Linux, Mac OSX or Solaris, which runs almost 60 percent of the Internet’s email servers today for routing, delivering and receiving email messages.

This is the second time in this month when the Exim maintainers have released an urgent security update. Earlier this month, the team patched a critical remote code execution flaw (CVE-2019-15846) in the software that could have allowed remote attackers to gain root-level access to the system.

Identified as CVE-2019-16928 and discovered by Jeremy Harris of Exim Development Team, the…

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