logo

Database

Lack of data validation In rubygems-update

Description

RubyGems Improper Input Validation vulnerability 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.

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem
Package
Affected version
Patched versions

Aliases

1. CVE-2015-40202. NVD-2015-40203. OSV-2015-40204. GCVE-2015-4020

References

1. https://github.com/rubygems/rubygems/commit/5c7bfb52. https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rubygems-update/CVE-2015-4020.yml3. https://puppet.com/security/cve/CVE-2015-39004. https://web.archive.org/web/20200228084212/http://www.securityfocus.com/bid/754315. https://web.archive.org/web/20200228085830/https://puppet.com/security/cve/CVE-2015-39006. https://www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-009/?fid=64787. https://www.trustwave.com/Resources/SpiderLabs-Blog/Attacking-Ruby-Gem-Security-with-CVE-2015-39008. http://blog.rubygems.org/2015/06/08/2.2.5-released.html9. http://blog.rubygems.org/2015/06/08/2.4.8-released.html10. http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html11. http://www.securityfocus.com/bid/75431

Does your application use this vulnerable software?

During the free trial, our tools assess your application, identify vulnerabilities, and provide recommendations for their remediation.