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CVE-2016-0763 Apache Tomcat Security Manager Bypass

Severity: Moderate

Vendor: The Apache Software Foundation

Versions Affected:
- - Apache Tomcat 7.0.0 to 7.0.67
- - Apache Tomcat 8.0.0.RC1 to 8.0.30
- - Apache Tomcat 9.0.0.M1 to 9.0.0.M2

Description:
ResourceLinkFactory.setGlobalContext() is a public method and was
accessible by web applications running under a security manager
without any checks. This allowed a malicious web application to inject
a malicious global context that could in turn be used to disrupt other
web applications and/or read and write data owned by other web
applications.

Mitigation:
Users of affected versions should apply one of the following mitigations
- - Upgrade to Apache Tomcat 9.0.0.M3 or later
- - Upgrade to Apache Tomcat 8.0.32 or later
  (8.0.31 has the fix but was not released)
- - Upgrade to Apache Tomcat 7.0.68 or later
- - Upgrade to Apache Tomcat 6.0.45 or later


Credit:
This issue was discovered by The Apache Tomcat Security Team.

References:
[1] http://tomcat.apache.org/security-9.html
[2] http://tomcat.apache.org/security-8.html
[3] http://tomcat.apache.org/security-7.html
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