CVE-2015-3900: Oracle Solaris

Medium severity, CVSS 5.0. EPSS: 8.9% chance of exploitation in the next 30 days.

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."

Affected products

• Oracle Solaris: version 11.3 only
• Red Hat Enterprise Linux: version 6.0 only; version 7.0 only
• Ruby-Lang Ruby: version 1.9 only; version 1.9.1 only; version 1.9.2 only; version 1.9.3 only; version 2.0.0 only; version 2.1 only; …
• Rubygems Rubygems: version 2.0.0 only; version 2.0.1 only; version 2.0.2 only; version 2.0.3 only; version 2.0.4 only; version 2.0.5 only; …

Published 2015-06-24. Last modified 2026-06-17.