MEDIUM
GHSA-qv62-xfj6-32xm
RubyGems Improper Input Validation vulnerability
Quick fix
GHSA-qv62-xfj6-32xm — rubygems-update: upgrade to the fixed version with the command below.
bundle update rubygems-updateDetails
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.
Are you affected?
Enter the version of the package you're using.
Affected packages
References
- https://nvd.nist.gov/vuln/detail/CVE-2015-4020[ADVISORY]
- https://github.com/rubygems/rubygems/commit/5c7bfb5[WEB]
- https://github.com/rubygems/rubygems[PACKAGE]
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rubygems-update/CVE-2015-4020.yml[WEB]
- https://puppet.com/security/cve/CVE-2015-3900[WEB]
- https://web.archive.org/web/20200228084212/http://www.securityfocus.com/bid/75431[WEB]
- https://web.archive.org/web/20200228085830/https://puppet.com/security/cve/CVE-2015-3900[WEB]
- https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-009/?fid=6478[WEB]
- https://www.trustwave.com/Resources/SpiderLabs-Blog/Attacking-Ruby-Gem-Security-with-CVE-2015-3900[WEB]
- http://blog.rubygems.org/2015/06/08/2.2.5-released.html[WEB]
- http://blog.rubygems.org/2015/06/08/2.4.8-released.html[WEB]
- http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html[WEB]
- http://www.securityfocus.com/bid/75431[WEB]