Ubuntu Security Notice 3177-1 - It was discovered that the Tomcat realm implementations incorrectly handled passwords when a username didn't exist. A remote attacker could possibly use this issue to enumerate usernames. This issue only applied to Ubuntu 12.04 LTS, Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. Alvaro Munoz and Alexander Mirosh discovered that Tomcat incorrectly limited use of a certain utility method. A malicious application could possibly use this to bypass Security Manager restrictions. This issue only applied to Ubuntu 12.04 LTS, Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. Various other issues were also addressed.
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Debian Linux Security Advisory 3738-1 - Multiple security vulnerabilities were discovered in the Tomcat servlet and JSP engine, as well as in its Debian-specific maintainer scripts. Those flaws allowed for privilege escalation, information disclosure, and remote code execution.
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