Security updates for Sunday 02/28/21

Security updates were issued by Debian ([DSA 4865-1] docker.io security update) CentOS (CEBA-2021:0623 CentOS 7 microcode_ctl BugFix Update, CESA-2020:5402 Important CentOS 7 libexif Security Update, CESA-2020:5408 Important CentOS 7 xorg-x11-server Security Update, CESA-2021:0024 Important CentOS 7 ImageMagick Security Update, CEBA-2020:4046 CentOS 7 grub2 BugFix Update, CESA-2021:0656 Critical CentOS 7 firefox Security Update, CESA-2021:0661 Important CentOS 7 thunderbird Security Update)