|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."|
|Source||CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)|
|Debian Bugs||790111, 790119|
Vulnerable and fixed packages
The table below lists information on source packages.
|stretch (security), stretch||1.7.26-1+deb9u1||fixed|
|bullseye, sid, buster||184.108.40.206-3||fixed|
The information below is based on the following data on fixed versions.
- rubygems <not-affected> (Affects versions between 2.0 and 2.4.6)
- libgems-ruby <not-affected> (Affects versions between 2.0 and 2.4.6)
- ruby1.8 <not-affected> (Vulnerable code not present)
- ruby1.9.1 <not-affected> (Bundles 1.8.23, vulnerable code introduced in later 1.9.1 versions)
[jessie] - jruby <not-affected> (Vulnerable code introduced with 1.7.19)
[wheezy] - jruby <not-affected> (Vulnerable code introduced with 1.7.19)
[squeeze] - jruby <not-affected> (Vulnerable code introduced with 1.7.19)