Description
The Expression Language (EL) implementation in Apache Tomcat 6.x before 6.0.44, 7.x before 7.0.58, and 8.x before 8.0.16 does not properly consider the possibility of an accessible interface implemented by an inaccessible class, which allows attackers to bypass a SecurityManager protection mechanism via a web application that leverages use of incorrect privileges during EL evaluation.
Remediation
References
http://svn.apache.org/viewvc?view=revision&revision=1644018
http://svn.apache.org/viewvc?view=revision&revision=1645642
http://tomcat.apache.org/security-6.html
http://tomcat.apache.org/security-8.html
http://tomcat.apache.org/security-7.html
http://www.debian.org/security/2016/dsa-3530
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05054964
http://marc.info/?l=bugtraq&m=145974991225029&w=2
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
http://rhn.redhat.com/errata/RHSA-2016-2046.html
http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2016-3090545.html
http://www.securityfocus.com/bid/74665
http://rhn.redhat.com/errata/RHSA-2016-0492.html
http://www.debian.org/security/2015/dsa-3428
http://www.debian.org/security/2016/dsa-3447
http://rhn.redhat.com/errata/RHSA-2015-1622.html
http://rhn.redhat.com/errata/RHSA-2015-1621.html
http://www.ubuntu.com/usn/USN-2655-1
http://www.securitytracker.com/id/1032330
http://www.ubuntu.com/usn/USN-2654-1
http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
https://lists.apache.org/thread.html/b8a1bf18155b552dcf9a928ba808cbadad84c236d85eab3033662cfb%40%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/39ae1f0bd5867c15755a6f959b271ade1aea04ccdc3b2e639dcd903b%40%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/37220405a377c0182d2afdbc36461c4783b2930fbeae3a17f1333113%40%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/b84ad1258a89de5c9c853c7f2d3ad77e5b8b2930be9e132d5cef6b95%40%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/r03c597a64de790ba42c167efacfa23300c3d6c9fe589ab87fe02859c%40%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/r9136ff5b13e4f1941360b5a309efee2c114a14855578c3a2cbe5d19c%40%3Cdev.tomcat.apache.org%3E
https://lists.apache.org/thread.html/r587e50b86c1a96ee301f751d50294072d142fd6dc08a8987ae9f3a9b%40%3Cdev.tomcat.apache.org%3E