Apache HTTP Server versions before 2.4.32 uses src:uwsgi where a flaw was discovered. The uwsgi protocol does not let us serialize more than 16K of HTTP header leading to resource exhaustion and denial of service.

For Debian 9 stretch, this problem has been fixed in version 2.0.14+20161117-3+deb9u3.

We recommend that you upgrade your uwsgi packages.

For the detailed security status of uwsgi please refer to its security tracker page at: https://security-tracker.debian.org/tracker/uwsgi

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS