Ubuntu Security Notice 976-1 – It was discovered that Tomcat incorrectly handled invalid Transfer-Encoding headers. A remote attacker could send specially crafted requests containing invalid headers to the server and cause a denial of service, or possibly obtain sensitive information from other requests.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/93149/USN-976-1.txt
Source: https://packetstormsecurity.com/files/93149/Ubuntu-Security-Notice-976-1.html