When a SecurityManager is configured, a web application’s ability to read system properties should be controlled by the SecurityManager. 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, 6.0.0 to 6.0.45 the system property replacement feature for configuration files could be used by a malicious web application to bypass the SecurityManager and read system properties that should not be visible.
rhn.redhat.com/errata/RHSA-2017-0457.html
www.debian.org/security/2016/dsa-3720
access.redhat.com/errata/RHSA-2017:0455
access.redhat.com/errata/RHSA-2017:0456
access.redhat.com/errata/RHSA-2017:2247
github.com/apache/tomcat
github.com/apache/tomcat/commit/0b41766456b1980e4f809e13ad6dc9fa912bae7e
github.com/apache/tomcat/commit/c1660182010b4255c21c874d69c124370a67784a
github.com/apache/tomcat/commit/f8db078f1e6e8b225f8344e63595113ca34cd408
github.com/apache/tomcat80/commit/ae6163a4f230bc679abfc93e048ff92996badad6
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nvd.nist.gov/vuln/detail/CVE-2016-6794
security.netapp.com/advisory/ntap-20180605-0001
usn.ubuntu.com/4557-1
web.archive.org/web/20170317100547/www.securitytracker.com/id/1037143
web.archive.org/web/20170626130744/www.securityfocus.com/bid/93943
www.oracle.com/security-alerts/cpuoct2021.html