RubyGems before 1.8.23 does not verify an SSL certificate, which allows remote attackers to modify a gem during installation via a man-in-the-middle attack.
{ "binaries": [ { "binary_version": "1.5.6-9+deb8u2build0.14.04.1~esm2", "binary_name": "jruby" } ] }
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2012/UBUNTU-CVE-2012-2126.json"