GoogleOSV:GHSA-QV62-XFJ6-32XMRubyGems Improper Input Validation vulnerability
0.008 Low
EPSS
Percentile
82.2%
RubyGems 2.0.x before 2.0.17, 2.2.x before 2.2.5, and 2.3.x before 2.4.8 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 with a domain that is suffixed with the original domain name, aka a “DNS hijack attack.”
NOTE: this vulnerability exists because of an incomplete fix for CVE-2015-3900.
References
blog.rubygems.org/2015/06/08/2.2.5-released.html
blog.rubygems.org/2015/06/08/2.4.8-released.html
www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html
www.securityfocus.com/bid/75431
github.com/rubygems/rubygems
github.com/rubygems/rubygems/commit/5c7bfb5
github.com/rubysec/ruby-advisory-db/blob/master/gems/rubygems-update/CVE-2015-4020.yml
nvd.nist.gov/vuln/detail/CVE-2015-4020
puppet.com/security/cve/CVE-2015-3900
web.archive.org/web/20200228084212/www.securityfocus.com/bid/75431
web.archive.org/web/20200228085830/https://puppet.com/security/cve/CVE-2015-3900
www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-009/?fid=6478
www.trustwave.com/Resources/SpiderLabs-Blog/Attacking-Ruby-Gem-Security-with-CVE-2015-3900
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