CVE-2014-0053 Information Disclosure in Grails applications Severity: Important Vendor: Grails by Pivotal Product Affected: - Grails Resources plugin 1.0.0 to 1.2.5 Products known to depend on the affected product: - Grails 2.0.0 to 2.3.6 Description: The Grails resources plug-in, a default dependency of Grails since 2.0.0, does not block access to resources located under /WEB-INF or /META-INF by default. This means that both configuration files and class files are publicly accessible when they should be private. Further, the filtering mechanism that applies any configured block does not normalise the requested URI before filtering allowing the block to be bypassed via directory traversal. Mitigation: Users of affected versions should apply one of the following mitigations: - Upgrade the resources plug-in to 1.2.6, configure the resources plug-in to block access to resources under /WEB-INF and /META-INF and the redploy the application - Prevent access to resources under /WEB-INF and /META-INF in the reverse proxy (if one is used) Possible configuration options to block access to /WEB-INF include adding the following to grails-app/conf/Config.groovy: grails.resources.adhoc.includes = ['/images/**', '/css/**', '/js/**', '/plugins/**'] grails.resources.adhoc.excludes = ['**/WEB-INF/**','**/META-INF/**'] Credit: The original /WEB-INF issue was identified by @Ramsharan065 but was reported publicly to the Grails team via Twitter. Pivotal strongly encourages responsible reporting of security vulnerabilities via security@gopivotal.com The /META-INF aspects of this issue were identified by numerous individuals and reported responsibly to either the Grails team or to the Pivotal Security team. The directory traversal aspects of this vulnerability were reported to the Pivotal security team by Kristian Mattila. References: https://twitter.com/Ramsharan065/status/434975409134792704 http://www.gopivotal.com/security/cve-2014-0053 (may take 24 hours to update) History: 2014-Feb-16: /WEB-INF issue made public 2014-Feb-19: Initial vulnerability report published 2014-Feb-27: Updated to include information on /META-INF and directory traversal aspects of this vulnerability. Separated out affected product and dependencies Extended affected Grails versions to include 2.3.6 Updated mitigations.