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. The openssl gem that contains this module is patched in version 2.0.0.

References

• https://nvd.nist.gov/vuln/detail/CVE-2017-14033
• https://access.redhat.com/errata/RHSA-2018:0378
• https://access.redhat.com/errata/RHSA-2018:0583
• https://access.redhat.com/errata/RHSA-2018:0585
• https://lists.debian.org/debian-lts-announce/2018/07/msg00012.html
• https://security.gentoo.org/glsa/201710-18
• https://www.debian.org/security/2017/dsa-4031
• https://www.ruby-lang.org/en/news/2017/09/14/openssl-asn1-buffer-underrun-cve-2017-14033/
• https://www.ruby-lang.org/en/news/2017/09/14/ruby-2-2-8-released/
• https://www.ruby-lang.org/en/news/2017/09/14/ruby-2-3-5-released/
• https://web.archive.org/web/20210509153849/http://www.securityfocus.com/bid/100868
• https://web.archive.org/web/20210622181826/http://www.securitytracker.com/id/1042004
• https://web.archive.org/web/20210724095519/http://www.securitytracker.com/id/1039363
• https://github.com/rubysec/ruby-advisory-db/blob/master/gems/openssl/CVE-2017-14033.yml
• ruby/openssl@36bf7f4