参照： Official debian advisory, NVD, CVE.org · CVE 詳細
Freshness: upstream tracker timestamp is available; use API updated time as primary recency signal.
CVE-2015-3900 unimportant priority: Debian including 2 source packages (jruby, rubygems), 9 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 9.
RubyGems 2.0.x before 2.0.16, 2.2.x before 2.2.4, and 2.4.x before 2.4.7 does not validate the hostname when fetching gems or making API requests, which allows remote attackers to redirect requests to arbitrary domains via a crafted DNS SRV record, aka a "DNS hijack attack."