Ubuntu: USN-3519-1 (CVE-2017-7674): Tomcat vulnerabilities

It was discovered that Tomcat incorrectly handled certain pipelined
requests when sendfile was used. A remote attacker could use this issue to
obtain wrong responses possibly containing sensitive information.
(CVE-2017-5647)

It was discovered that Tomcat incorrectly used the appropriate facade
object. A malicious application could possibly use this to bypass Security
Manager restrictions. (CVE-2017-5648)

It was discovered that Tomcat incorrectly handled error pages. A remote
attacker could possibly use this issue to replace or remove the custom
error page. (CVE-2017-5664)

It was discovered that Tomcat incorrectly handled the CORS filter. A remote
attacker could possibly use this issue to perform cache poisoning.
(CVE-2017-7674)