CVE-2015-3900

critical

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."

References

Advisories
More

https://www.trustwave.com/Resources/SpiderLabs-Blog/Attacking-Ruby-Gem-Security-with-CVE-2015-3900/

https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-007/?fid=6356

http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html

http://www.openwall.com/lists/oss-security/2015/06/26/2

http://rhn.redhat.com/errata/RHSA-2015-1657.html

https://github.com/advisories/GHSA-wp3j-rvfp-624h

https://github.com/SpiderLabs/cve_server

https://puppet.com/security/cve/CVE-2015-3900

http://www.securityfocus.com/bid/75482

http://lists.fedoraproject.org/pipermail/package-announce/2015-August/164236.html

http://lists.fedoraproject.org/pipermail/package-announce/2015-August/163600.html

http://lists.fedoraproject.org/pipermail/package-announce/2015-August/163502.html

http://blog.rubygems.org/2015/05/14/CVE-2015-3900.html

Details

Source: Mitre, NVD

Published: 2015-06-24

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 9.8

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity: Critical

EPSS

EPSS: 0.02065