Mercurial > hg > nginx
diff src/http/ngx_http_upstream.c @ 8033:2bf7792c262e
Upstream: header handlers can now return parsing errors.
With this change, duplicate Content-Length and Transfer-Encoding headers
are now rejected. Further, responses with invalid Content-Length or
Transfer-Encoding headers are now rejected, as well as responses with both
Content-Length and Transfer-Encoding.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Mon, 30 May 2022 21:25:48 +0300 |
parents | 2025aae94739 |
children | 413dbda22f7d |
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--- a/src/http/ngx_http_upstream.c +++ b/src/http/ngx_http_upstream.c @@ -4633,10 +4633,34 @@ ngx_http_upstream_process_content_length u = r->upstream; + if (u->headers_in.content_length) { + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + "upstream sent duplicate header line: \"%V: %V\", " + "previous value: \"%V: %V\"", + &h->key, &h->value, + &u->headers_in.content_length->key, + &u->headers_in.content_length->value); + return NGX_HTTP_UPSTREAM_INVALID_HEADER; + } + + if (u->headers_in.transfer_encoding) { + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + "upstream sent \"Content-Length\" and " + "\"Transfer-Encoding\" headers at the same time"); + return NGX_HTTP_UPSTREAM_INVALID_HEADER; + } + h->next = NULL; u->headers_in.content_length = h; u->headers_in.content_length_n = ngx_atoof(h->value.data, h->value.len); + if (u->headers_in.content_length_n == NGX_ERROR) { + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + "upstream sent invalid \"Content-Length\" header: " + "\"%V: %V\"", &h->key, &h->value); + return NGX_HTTP_UPSTREAM_INVALID_HEADER; + } + return NGX_OK; } @@ -5021,14 +5045,37 @@ ngx_http_upstream_process_transfer_encod ngx_http_upstream_t *u; u = r->upstream; + + if (u->headers_in.transfer_encoding) { + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + "upstream sent duplicate header line: \"%V: %V\", " + "previous value: \"%V: %V\"", + &h->key, &h->value, + &u->headers_in.transfer_encoding->key, + &u->headers_in.transfer_encoding->value); + return NGX_HTTP_UPSTREAM_INVALID_HEADER; + } + + if (u->headers_in.content_length) { + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + "upstream sent \"Content-Length\" and " + "\"Transfer-Encoding\" headers at the same time"); + return NGX_HTTP_UPSTREAM_INVALID_HEADER; + } + u->headers_in.transfer_encoding = h; h->next = NULL; - if (ngx_strlcasestrn(h->value.data, h->value.data + h->value.len, - (u_char *) "chunked", 7 - 1) - != NULL) + if (h->value.len == 7 + && ngx_strncasecmp(h->value.data, (u_char *) "chunked", 7) == 0) { u->headers_in.chunked = 1; + + } else { + ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, + "upstream sent unknown \"Transfer-Encoding\": \"%V\"", + &h->value); + return NGX_HTTP_UPSTREAM_INVALID_HEADER; } return NGX_OK;