The decode method in the OpenSSL::ASN1 module in Ruby before 2.2.8, 2.3.x before 2.3.5, and 2.4.x through 2.4.1 allows attackers to cause a denial of service (interpreter crash) via a crafted string.
www.securityfocus.com/bid/100868
www.securitytracker.com/id/1039363
www.securitytracker.com/id/1042004
access.redhat.com/errata/RHSA-2018:0378
access.redhat.com/errata/RHSA-2018:0583
access.redhat.com/errata/RHSA-2018:0585
lists.debian.org/debian-lts-announce/2018/07/msg00012.html
security.gentoo.org/glsa/201710-18
www.debian.org/security/2017/dsa-4031
www.ruby-lang.org/en/news/2017/09/14/openssl-asn1-buffer-underrun-cve-2017-14033/
www.ruby-lang.org/en/news/2017/09/14/ruby-2-2-8-released/
www.ruby-lang.org/en/news/2017/09/14/ruby-2-3-5-released/