From 7bcb50c0610a18bf43bef0062b2d2dc550823b53 Mon Sep 17 00:00:00 2001 From: Sergey Kandaurov Date: Mon, 9 Aug 2021 18:12:12 +0300 Subject: Disabled HTTP/1.0 requests with Transfer-Encoding. The latest HTTP/1.1 draft describes Transfer-Encoding in HTTP/1.0 as having potentially faulty message framing as that could have been forwarded without handling of the chunked encoding, and forbids processing subsequest requests over that connection: https://github.com/httpwg/http-core/issues/879. While handling of such requests is permitted, the most secure approach seems to reject them. --- src/http/ngx_http_request.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'src/http/ngx_http_request.c') diff --git a/src/http/ngx_http_request.c b/src/http/ngx_http_request.c index 2d1845d02..bf931bf35 100644 --- a/src/http/ngx_http_request.c +++ b/src/http/ngx_http_request.c @@ -1983,6 +1983,14 @@ ngx_http_process_request_header(ngx_http_request_t *r) } if (r->headers_in.transfer_encoding) { + if (r->http_version < NGX_HTTP_VERSION_11) { + ngx_log_error(NGX_LOG_INFO, r->connection->log, 0, + "client sent HTTP/1.0 request with " + "\"Transfer-Encoding\" header"); + ngx_http_finalize_request(r, NGX_HTTP_BAD_REQUEST); + return NGX_ERROR; + } + if (r->headers_in.transfer_encoding->value.len == 7 && ngx_strncasecmp(r->headers_in.transfer_encoding->value.data, (u_char *) "chunked", 7) == 0) -- cgit v1.2.3