NGINX -- Multiple vulnerabilities

NGINX Team reports:

Two security issues were identified in nginx HTTP/2 implementation,
which might cause excessive memory consumption (CVE-2018-16843)
and CPU usage (CVE-2018-16844).
The issues affect nginx compiled with the ngx_http_v2_module (not
compiled by default) if the “http2” option of the “listen” directive is
used in a configuration file.
A security issue was identified in the ngx_http_mp4_module, which might
allow an attacker to cause infinite loop in a worker process, cause a
worker process crash, or might result in worker process memory
isclosure by using a specially crafted mp4 file (CVE-2018-16845).
The issue only affects nginx if it is built with the ngx_http_mp4_module
(the module is not built by default) and the “mp4” directive is used in
the configuration file. Further, the attack is only possible if an
attacker is able to trigger processing of a specially crafted mp4 file
with the ngx_http_mp4_module.