OpenBSD Errata: January 30th, 2020 (smtpd_tls)
28 January, 2020 by email@example.com | openbsd
Errata patches for OpenSMTPD have been released for OpenBSD 6.5 and 6.6. smtpd can crash on opportunistic TLS downgrade, causing a denial of service. Binary updates for the amd64, i386, and arm64 platforms are available via the syspatch utility. Source code patches can be found on the respective errata page: https://www.openbsd.org/errata65.html https://www.openbsd.org/errata66.html After patching, restart the smtpd service.