CVE-2015-4020: Input Validation

First published: Tue Aug 25 2015(Updated: )

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.

Credit: cve@mitre.org cve@mitre.org

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

• collector/github-advisory-latest
• alias/GHSA-qv62-xfj6-32xm
• alias/CVE-2015-4020
• collector/github-advisory
• collector/nvd-index
• collector/nvd-cve
• agent/author
• agent/type
• agent/softwarecombine
• collector/mitre-cve
• source/MITRE
• agent/last-modified-date
• agent/severity
• agent/references
• agent/weakness
• agent/tags
• agent/first-publish-date
• agent/description
• agent/event
• agent/trending
• package-manager/rubygems
• vendor/oracle
• canonical/oracle solaris
• version/oracle solaris/11.3
• vendor/rubygems
• canonical/rubygems rubygems
• version/rubygems rubygems/2.0.0
• version/rubygems rubygems/2.0.0-preview2
• version/rubygems rubygems/2.0.0-preview2.1
• version/rubygems rubygems/2.0.0-preview2.2
• version/rubygems rubygems/2.0.0-rc1
• version/rubygems rubygems/2.0.0-rc2
• version/rubygems rubygems/2.0.1
• version/rubygems rubygems/2.0.2
• version/rubygems rubygems/2.0.3
• version/rubygems rubygems/2.0.4
• version/rubygems rubygems/2.0.5
• version/rubygems rubygems/2.0.6
• version/rubygems rubygems/2.0.7
• version/rubygems rubygems/2.0.8
• version/rubygems rubygems/2.0.9
• version/rubygems rubygems/2.0.10
• version/rubygems rubygems/2.0.11
• version/rubygems rubygems/2.0.12
• version/rubygems rubygems/2.0.13
• version/rubygems rubygems/2.0.14
• version/rubygems rubygems/2.0.15
• version/rubygems rubygems/2.0.16
• version/rubygems rubygems/2.2.0
• version/rubygems rubygems/2.2.1
• version/rubygems rubygems/2.2.2
• version/rubygems rubygems/2.2.3
• version/rubygems rubygems/2.2.4
• version/rubygems rubygems/2.4.0
• version/rubygems rubygems/2.4.1
• version/rubygems rubygems/2.4.2
• version/rubygems rubygems/2.4.3
• version/rubygems rubygems/2.4.4
• version/rubygems rubygems/2.4.5
• version/rubygems rubygems/2.4.6
• version/rubygems rubygems/2.4.7