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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2015-4020 Detail

Current Description

RubyGems 2.0.x before 2.0.17, 2.2.x before 2.2.5, and 2.4.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 to an incomplete fix for CVE-2015-3900.


View Analysis Description

Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
http://blog.rubygems.org/2015/06/08/2.2.5-released.html CVE, MITRE Vendor Advisory 
http://blog.rubygems.org/2015/06/08/2.4.8-released.html CVE, MITRE Vendor Advisory 
http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html CVE, MITRE Third Party Advisory 
http://www.securityfocus.com/bid/75431 CVE, MITRE
https://github.com/rubygems/rubygems/commit/5c7bfb5 CVE, MITRE
https://puppet.com/security/cve/CVE-2015-3900 CVE, MITRE
https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-009/?fid=6478 CVE, MITRE Third Party Advisory 
https://www.trustwave.com/Resources/SpiderLabs-Blog/Attacking-Ruby-Gem-Security-with-CVE-2015-3900/ CVE, MITRE Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-20 Improper Input Validation cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

12 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2015-4020
NVD Published Date:
08/25/2015
NVD Last Modified:
04/12/2025
Source:
MITRE