Exim is a message transfer agent (MTA) designed to be a a highly configurable, drop-in replacement for sendmail.
Multiple vulnerabilities have been discovered in Exim. Please review the CVE identifiers referenced below for details.
A remote attacker, by connecting to the SMTP listener daemon, could possibly execute arbitrary code with the privileges of the process or cause a Denial of Service condition.
There is no known workaround at this time.
All Exim users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=mail-mta/exim-4.92.2"