Description
The ResourceLinkFactory implementation in Apache Tomcat 9.0.0.M1 to 9.0.0.M9, 8.5.0 to 8.5.4, 8.0.0.RC1 to 8.0.36, 7.0.0 to 7.0.70 and 6.0.0 to 6.0.45 did not limit web application access to global JNDI resources to those resources explicitly linked to the web application. Therefore, it was possible for a web application to access any global JNDI resource whether an explicit ResourceLink had been configured or not.
Remediation
References
http://www.securitytracker.com/id/1037145
http://www.securityfocus.com/bid/93940
http://www.debian.org/security/2016/dsa-3720
https://access.redhat.com/errata/RHSA-2017:2247
https://access.redhat.com/errata/RHSA-2017:0456
https://access.redhat.com/errata/RHSA-2017:0455
http://rhn.redhat.com/errata/RHSA-2017-0457.html
https://security.netapp.com/advisory/ntap-20180605-0001/
https://usn.ubuntu.com/4557-1/
https://www.oracle.com/security-alerts/cpuoct2021.html
https://lists.apache.org/thread.html/9325837eb00cba5752c092047433c7f0415134d16e7f391447ff4352%40%3Cannounce.tomcat.apache.org%3E
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