Description
The ActiveSupport::XmlMini_JDOM backend in lib/active_support/xml_mini/jdom.rb in the Active Support component in Ruby on Rails 3.0.x and 3.1.x before 3.1.12 and 3.2.x before 3.2.13, when JRuby is used, does not properly restrict the capabilities of the XML parser, which allows remote attackers to read arbitrary files or cause a denial of service (resource consumption) via vectors involving (1) an external DTD or (2) an external entity declaration in conjunction with an entity reference.
Remediation
References
Related Vulnerabilities
Atlassian Jira Cross-Site Request Forgery (CSRF) Vulnerability (CVE-2019-20415)
ownCloud Improper Control of Generation of Code ('Code Injection') Vulnerability (CVE-2013-1850)
WordPress Plugin Resim Ara Cross-Site Scripting (3.0)
Jenkins Exposure of Sensitive Information to an Unauthorized Actor Vulnerability (CVE-2014-3662)