Note: This article was originally published in 2013. Some steps, commands, or software versions may have changed. Check the current NginX documentation for the latest information.

Changes with (http://nginx.org/ “Nginx”) 1.5.7

Below are the list of changes from the 1.5.6 release of NginX to version 1.5.7. This is provided as reference only and was obtained from: http://nginx.org/en/CHANGES  

Changes with nginx 1.5.7                                         19 Nov 2013

    *) Security: a character following an unescaped space in a request line
       was handled incorrectly (CVE-2013-4547); the bug had appeared in
       0.8.41.
       Thanks to Ivan Fratric of the Google Security Team.

    *) Change: a logging level of auth_basic errors about no user/password
       provided has been lowered from "error" to "info".

    *) Feature: the "proxy_cache_revalidate", "fastcgi_cache_revalidate",
       "scgi_cache_revalidate", and "uwsgi_cache_revalidate" directives.

    *) Feature: the "ssl_session_ticket_key" directive.
       Thanks to Piotr Sikora.

    *) Bugfix: the directive "add_header Cache-Control ''" added a
       "Cache-Control" response header line with an empty value.

    *) Bugfix: the "satisfy any" directive might return 403 error instead of
       401 if auth_request and auth_basic directives were used.
       Thanks to Jan Marc Hoffmann.

    *) Bugfix: the "accept_filter" and "deferred" parameters of the "listen"
       directive were ignored for listen sockets created during binary
       upgrade.
       Thanks to Piotr Sikora.

    *) Bugfix: some data received from a backend with unbufferred proxy
       might not be sent to a client immediately if "gzip" or "gunzip"
       directives were used.
       Thanks to Yichun Zhang.

    *) Bugfix: in error handling in ngx_http_gunzip_filter_module.

    *) Bugfix: responses might hang if the ngx_http_spdy_module was used
       with the "auth_request" directive.

    *) Bugfix: memory leak in nginx/Windows.

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