CVE-2015-3900

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."

• CWE-254

• http://blog.rubygems.org/2015/05/14/CVE-2015-3900.htmlPatch, Vendor Advisory
• http://lists.fedoraproject.org/pipermail/package-announce/2015-August/163502.html
• http://lists.fedoraproject.org/pipermail/package-announce/2015-August/163600.html
• http://lists.fedoraproject.org/pipermail/package-announce/2015-August/164236.html
• http://rhn.redhat.com/errata/RHSA-2015-1657.htmlThird Party Advisory
• http://www.openwall.com/lists/oss-security/2015/06/26/2Third Party Advisory
• http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.htmlThird Party Advisory
• http://www.securityfocus.com/bid/75482
• https://puppet.com/security/cve/CVE-2015-3900
• https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-007/?fid=6356Third Party Advisory
• https://www.trustwave.com/Resources/SpiderLabs-Blog/Attacking-Ruby-Gem-Security-with-CVE-2015-3900/Third Party Advisory
• http://blog.rubygems.org/2015/05/14/CVE-2015-3900.htmlPatch, Vendor Advisory
• http://lists.fedoraproject.org/pipermail/package-announce/2015-August/163502.html
• http://lists.fedoraproject.org/pipermail/package-announce/2015-August/163600.html
• http://lists.fedoraproject.org/pipermail/package-announce/2015-August/164236.html
• http://rhn.redhat.com/errata/RHSA-2015-1657.htmlThird Party Advisory
• http://www.openwall.com/lists/oss-security/2015/06/26/2Third Party Advisory
• http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.htmlThird Party Advisory
• http://www.securityfocus.com/bid/75482
• https://puppet.com/security/cve/CVE-2015-3900
• https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-007/?fid=6356Third Party Advisory
• https://www.trustwave.com/Resources/SpiderLabs-Blog/Attacking-Ruby-Gem-Security-with-CVE-2015-3900/Third Party Advisory

Published

Jun 24, 2015

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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