id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	uname	nginx_version
1560	Slow response on wrong request	yarons@…		"We've noticed in our servers that some attackers try to add a website URL to the GET request they send to our servers (instead of path).

I managed to reduce the request from a whole https://something address to a simple a://a so the problem still happens.

Since most of the standard UI tools are incompatible with this kind of requests I had to generate a GET packet myself and send it with netcat.

The reason I know there's a problem specifically with nginx is I sent this request to both nginx and Apache website and I got two different responses.

This request returns 400 immediately:
time echo -e 'GET a://a HTTP/1.1' | nc httpd.apache.org 80

This request is waiting for 60 seconds and returns nothing:
time echo -e 'GET a://a HTTP/1.1' | nc nginx.org 80

I don't have IIS to test this on but I'm pretty sure will be seeing something similar.

(Although my version is older than the official website I've attached my nginx -V, I can confirm this on 1.13.12 as running on the main nginx website)."	defect	closed	minor		nginx-core	1.13.x	invalid	timeout, bad request		Linux my-site 4.9.32-15.41.amzn1.x86_64 #1 SMP Thu Jun 22 06:20:54 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux	"nginx version: nginx/1.10.3
built by gcc 4.8.3 20140911 (Red Hat 4.8.3-9) (GCC) 
built with OpenSSL 1.0.1k-fips 8 Jan 2015
TLS SNI support enabled
configure arguments: --prefix=/usr/share/nginx --sbin-path=/usr/sbin/nginx --modules-path=/usr/lib64/nginx/modules --conf-path=/etc/nginx/nginx.conf --error-log-path=/var/log/nginx/error.log --http-log-path=/var/log/nginx/access.log --http-client-body-temp-path=/var/lib/nginx/tmp/client_body --http-proxy-temp-path=/var/lib/nginx/tmp/proxy --http-fastcgi-temp-path=/var/lib/nginx/tmp/fastcgi --http-uwsgi-temp-path=/var/lib/nginx/tmp/uwsgi --http-scgi-temp-path=/var/lib/nginx/tmp/scgi --pid-path=/var/run/nginx.pid --lock-path=/var/lock/subsys/nginx --user=nginx --group=nginx --with-file-aio --with-ipv6 --with-http_ssl_module --with-http_v2_module --with-http_realip_module --with-http_addition_module --with-http_xslt_module=dynamic --with-http_image_filter_module=dynamic --with-http_geoip_module=dynamic --with-http_sub_module --with-http_dav_module --with-http_flv_module --with-http_mp4_module --with-http_gunzip_module --with-http_gzip_static_module --with-http_random_index_module --with-http_secure_link_module --with-http_degradation_module --with-http_slice_module --with-http_stub_status_module --with-http_perl_module=dynamic --with-mail=dynamic --with-mail_ssl_module --with-pcre --with-pcre-jit --with-stream=dynamic --with-stream_ssl_module --with-google_perftools_module --with-debug --with-cc-opt='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic' --with-ld-opt=' -Wl,-E'"