While parsing an IPAddressFamily extension in an X.509 certificate, it is possible to do a one-byte overread. This would result in an incorrect text display of the certificate. This bug has been present since 2006 and is present in all versions of OpenSSL before 1.0.2m and 1.1.0g.
https://access.redhat.com/errata/RHSA-2018:3221
https://access.redhat.com/errata/RHSA-2018:3505
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
https://github.com/openssl/openssl/commit/068b963bb7afc57f5bdd723de0dd15e7795d5822
https://lists.debian.org/debian-lts-announce/2017/11/msg00011.html
https://security.FreeBSD.org/advisories/FreeBSD-SA-17:11.openssl.asc
https://security.gentoo.org/glsa/201712-03
https://security.netapp.com/advisory/ntap-20170927-0001/
https://security.netapp.com/advisory/ntap-20171107-0002/
https://support.apple.com/HT208331
https://usn.ubuntu.com/3611-2/
https://www.debian.org/security/2017/dsa-4017
https://www.debian.org/security/2017/dsa-4018
https://www.openssl.org/news/secadv/20170828.txt
https://www.openssl.org/news/secadv/20171102.txt
https://www.oracle.com//security-alerts/cpujul2021.html
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html
https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html
https://www.tenable.com/security/tns-2017-14
https://www.tenable.com/security/tns-2017-15
http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html
http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html