CVE-2015-4020: Improper Input Validation
(updated )
RubyGems 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.
References
- blog.rubygems.org/2015/06/08/2.2.5-released.html
- blog.rubygems.org/2015/06/08/2.4.8-released.html
- www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html
- www.securityfocus.com/bid/75431
- github.com/rubygems/rubygems/commit/5c7bfb5
- nvd.nist.gov/vuln/detail/CVE-2015-4020
- puppet.com/security/cve/CVE-2015-3900
- www.trustwave.com/Resources/Security-Advisories/Advisories/TWSL2015-009/?fid=6478
- www.trustwave.com/Resources/SpiderLabs-Blog/Attacking-Ruby-Gem-Security-with-CVE-2015-3900/
Code Behaviors & Features
Detect and mitigate CVE-2015-4020 with GitLab Dependency Scanning
Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →