tomcat -- multiple vulnerabilities

Tomcat Security Team reports:

Tomcat does not properly restrict XSLT stylesheets, which allows
remote attackers to bypass security-manager restrictions and read
arbitrary files via a crafted web application that provides an XML
external entity declaration in conjunction with an entity
reference, related to an XML External Entity (XXE) issue.
An integer overflow, when operated behind a reverse proxy, allows
remote attackers to conduct HTTP request smuggling attacks via a
crafted Content-Length HTTP header.
An integer overflow in parseChunkHeader allows remote attackers
to cause a denial of service (resource consumption) via a malformed
chunk size in chunked transfer coding of a request during the
streaming of data.