Fedora Fedora 21 Security Update: rubygems-2.2.5-100.fc21 August 10, 2015 007admin Leave a comment Resolved Bugs1236116 – CVE-2015-3900 rubygems: DNS hijacking vulnerability in api_endpoint()1236117 – CVE-2015-3900 rubygems: DNS hijacking vulnerability in api_endpoint() [fedora-all]<brUpdate to RubyGems 2.2.5.