A HTTP Response Smuggling vulnerability was fixed mod_proxy_uwsgi apache module included in uwsgi package. Special characters in the origin response header can truncate/split the response forwarded to the client.
For Debian 9 stretch, these problems have been fixed in version 2.0.14+20161117-3+deb9u6.
We recommend that you upgrade your uwsgi packages.
Further information about Extended LTS security advisories can be found in the dedicated section of our website.