Ruby on Rails Directory Traversal Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2022-03-25
• EPSS: 54% chance of exploitation in the next 30 days (higher than 99% of CVEs)

[ Description ]Official description

Directory traversal vulnerability in actionpack/lib/abstract_controller/base.rb in the implicit-render implementation in Ruby on Rails before 3.2.18, 4.0.x before 4.0.5, and 4.1.x before 4.1.1, when certain route globbing configurations are enabled, allows remote attackers to read arbitrary files via a crafted request.

CISA: Directory traversal vulnerability in actionpack/lib/abstract_controller/base.rb in the implicit-render implementation in Ruby on Rails allows remote attackers to read arbitrary files via a crafted request.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 15 Apr 2022): Apply updates per vendor instructions.

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• matasano.com/research/AnatomyOfRailsVuln-CVE-2014-0130.pdfBroken LinkTechnical Description
• rhn.redhat.com/errata/RHSA-2014-1863.htmlThird Party Advisory
• www.securityfocus.com/bid/67244Broken LinkThird Party AdvisoryVDB Entry
• groups.google.com/forum/message/rawBroken LinkThird Party Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource