CVE-2015-3900
RubyGems vulnerable to DNS hijack attack
EPSS 2.4%
Description
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."
How to fix CVE-2015-3900
To remediate CVE-2015-3900, upgrade the affected package to a fixed version below.
- Debian/jruby—upgrade to 1.7.20.1-2 or later
- RubyGems/rubygems-update—upgrade to 2.0.16 or later
Is CVE-2015-3900 being exploited?
Low — EPSS is 2.4%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 1.7.20.1-2
- >= 2.0.0, < 2.0.16