Vulnerability Details CVE-2015-4020
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.005
EPSS Ranking 65.9%
CVSS Severity
CVSS v2 Score 4.3
References
- http://blog.rubygems.org/2015/06/08/2.2.5-released.html
- http://blog.rubygems.org/2015/06/08/2.4.8-released.html
- http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html
- http://www.securityfocus.com/bid/75431
- https://github.com/rubygems/rubygems/commit/5c7bfb5
- https://puppet.com/security/cve/CVE-2015-3900
- https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-009/?fid=6478
- https://www.trustwave.com/Resources/SpiderLabs-Blog/Attacking-Ruby-Gem-Security-with-CVE-2015-3900/
- http://blog.rubygems.org/2015/06/08/2.2.5-released.html
- http://blog.rubygems.org/2015/06/08/2.4.8-released.html
- http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html
- http://www.securityfocus.com/bid/75431
- https://github.com/rubygems/rubygems/commit/5c7bfb5
- https://puppet.com/security/cve/CVE-2015-3900
- https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-009/?fid=6478
- https://www.trustwave.com/Resources/SpiderLabs-Blog/Attacking-Ruby-Gem-Security-with-CVE-2015-3900/
Products affected by CVE-2015-4020
-
cpe:2.3:a:rubygems:rubygems:2.0.0
-
cpe:2.3:a:rubygems:rubygems:2.0.1
-
cpe:2.3:a:rubygems:rubygems:2.0.10
-
cpe:2.3:a:rubygems:rubygems:2.0.11
-
cpe:2.3:a:rubygems:rubygems:2.0.12
-
cpe:2.3:a:rubygems:rubygems:2.0.13
-
cpe:2.3:a:rubygems:rubygems:2.0.14
-
cpe:2.3:a:rubygems:rubygems:2.0.15
-
cpe:2.3:a:rubygems:rubygems:2.0.16
-
cpe:2.3:a:rubygems:rubygems:2.0.2
-
cpe:2.3:a:rubygems:rubygems:2.0.3
-
cpe:2.3:a:rubygems:rubygems:2.0.4
-
cpe:2.3:a:rubygems:rubygems:2.0.5
-
cpe:2.3:a:rubygems:rubygems:2.0.6
-
cpe:2.3:a:rubygems:rubygems:2.0.7
-
cpe:2.3:a:rubygems:rubygems:2.0.8
-
cpe:2.3:a:rubygems:rubygems:2.0.9
-
cpe:2.3:a:rubygems:rubygems:2.2.0
-
cpe:2.3:a:rubygems:rubygems:2.2.1
-
cpe:2.3:a:rubygems:rubygems:2.2.2
-
cpe:2.3:a:rubygems:rubygems:2.2.3
-
cpe:2.3:a:rubygems:rubygems:2.2.4
-
cpe:2.3:a:rubygems:rubygems:2.4.0
-
cpe:2.3:a:rubygems:rubygems:2.4.1
-
cpe:2.3:a:rubygems:rubygems:2.4.2
-
cpe:2.3:a:rubygems:rubygems:2.4.3
-
cpe:2.3:a:rubygems:rubygems:2.4.4
-
cpe:2.3:a:rubygems:rubygems:2.4.5
-
cpe:2.3:a:rubygems:rubygems:2.4.6
-
cpe:2.3:a:rubygems:rubygems:2.4.7
-
cpe:2.3:o:oracle:solaris:11.3