SB2014110801 - Path traversal in Rails Action Mailer for Ruby on Rails

Description

This security bulletin contains information about 1 security vulnerability.

1) Path traversal (CVE-ID: CVE-2014-7818)

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences in actionpack/lib/action_dispatch/middleware/static.rb in Action Pack in Ruby on Rails 3.x before 3.2.20, 4.0.x before 4.0.11, 4.1.x before 4.1.7, and 4.2.x before 4.2.0.beta3, when serve_static_assets is enabled,. A remote authenticated attacker can send a specially crafted HTTP request and remote attackers to determine the existence of files outside the application root via a /.%2F sequence.

Remediation

Install update from vendor's website.

References

• http://lists.opensuse.org/opensuse-updates/2014-11/msg00112.html
• https://groups.google.com/forum/message/raw?msg=rubyonrails-security/dCp7duBiQgo/v_R_8PFs5IwJ
• https://puppet.com/security/cve/cve-2014-7829