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Disabled spaces in URIs (ticket #196).

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From now on, requests with spaces in URIs are immediately rejected rather
than allowed.  Spaces were allowed in 31e9677b15a1 (0.8.41) to handle bad
clients.  It is believed that now this behaviour causes more harm than
good.
This commit is contained in:
Maxim Dounin 2021-06-28 18:01:13 +03:00
parent fee09fc49d
commit 05395f4889
4 changed files with 11 additions and 70 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
src/http/modules/ngx_http_proxy_module.c
View File

@ -1186,7 +1186,7 @@ ngx_http_proxy_create_key(ngx_http_request_t *r)
loc_len = (r->valid_location && ctx->vars.uri.len) ? plcf->location.len : 0;
if (r->quoted_uri || r->space_in_uri || r->internal) {
if (r->quoted_uri || r->internal) {
escape = 2 * ngx_escape_uri(NULL, r->uri.data + loc_len,
r->uri.len - loc_len, NGX_ESCAPE_URI);
} else {
@ -1299,7 +1299,7 @@ ngx_http_proxy_create_request(ngx_http_request_t *r)
loc_len = (r->valid_location && ctx->vars.uri.len) ?
plcf->location.len : 0;
if (r->quoted_uri || r->space_in_uri || r->internal) {
if (r->quoted_uri || r->internal) {
escape = 2 * ngx_escape_uri(NULL, r->uri.data + loc_len,
r->uri.len - loc_len, NGX_ESCAPE_URI);
}

72
src/http/ngx_http_parse.c
View File

@ -116,10 +116,8 @@ ngx_http_parse_request_line(ngx_http_request_t *r, ngx_buf_t *b)
sw_host_end,
sw_host_ip_literal,
sw_port,
sw_host_http_09,
sw_after_slash_in_uri,
sw_check_uri,
sw_check_uri_http_09,
sw_uri,
sw_http_09,
sw_http_H,
@ -398,7 +396,7 @@ ngx_http_parse_request_line(ngx_http_request_t *r, ngx_buf_t *b)
*/
r->uri_start = r->schema_end + 1;
r->uri_end = r->schema_end + 2;
state = sw_host_http_09;
state = sw_http_09;
break;
default:
return NGX_HTTP_PARSE_INVALID_REQUEST;
@ -472,35 +470,13 @@ ngx_http_parse_request_line(ngx_http_request_t *r, ngx_buf_t *b)
*/
r->uri_start = r->schema_end + 1;
r->uri_end = r->schema_end + 2;
state = sw_host_http_09;
state = sw_http_09;
break;
default:
return NGX_HTTP_PARSE_INVALID_REQUEST;
}
break;
/* space+ after "http://host[:port] " */
case sw_host_http_09:
switch (ch) {
case ' ':
break;
case CR:
r->http_minor = 9;
state = sw_almost_done;
break;
case LF:
r->http_minor = 9;
goto done;
case 'H':
r->http_protocol.data = p;
state = sw_http_H;
break;
default:
return NGX_HTTP_PARSE_INVALID_REQUEST;
}
break;
/* check "/.", "//", "%", and "\" (Win32) in URI */
case sw_after_slash_in_uri:
@ -512,7 +488,7 @@ ngx_http_parse_request_line(ngx_http_request_t *r, ngx_buf_t *b)
switch (ch) {
case ' ':
r->uri_end = p;
state = sw_check_uri_http_09;
state = sw_http_09;
break;
case CR:
r->uri_end = p;
@ -584,7 +560,7 @@ ngx_http_parse_request_line(ngx_http_request_t *r, ngx_buf_t *b)
break;
case ' ':
r->uri_end = p;
state = sw_check_uri_http_09;
state = sw_http_09;
break;
case CR:
r->uri_end = p;
@ -621,31 +597,6 @@ ngx_http_parse_request_line(ngx_http_request_t *r, ngx_buf_t *b)
}
break;
/* space+ after URI */
case sw_check_uri_http_09:
switch (ch) {
case ' ':
break;
case CR:
r->http_minor = 9;
state = sw_almost_done;
break;
case LF:
r->http_minor = 9;
goto done;
case 'H':
r->http_protocol.data = p;
state = sw_http_H;
break;
default:
r->space_in_uri = 1;
state = sw_check_uri;
p--;
break;
}
break;
/* URI */
case sw_uri:
@ -692,10 +643,7 @@ ngx_http_parse_request_line(ngx_http_request_t *r, ngx_buf_t *b)
state = sw_http_H;
break;
default:
r->space_in_uri = 1;
state = sw_uri;
p--;
break;
return NGX_HTTP_PARSE_INVALID_REQUEST;
}
break;
@ -1171,9 +1119,7 @@ ngx_http_parse_uri(ngx_http_request_t *r)
switch (ch) {
case ' ':
r->space_in_uri = 1;
state = sw_check_uri;
break;
return NGX_ERROR;
case '.':
r->complex_uri = 1;
state = sw_uri;
@ -1232,8 +1178,7 @@ ngx_http_parse_uri(ngx_http_request_t *r)
r->uri_ext = p + 1;
break;
case ' ':
r->space_in_uri = 1;
break;
return NGX_ERROR;
#if (NGX_WIN32)
case '\\':
r->complex_uri = 1;
@ -1267,8 +1212,7 @@ ngx_http_parse_uri(ngx_http_request_t *r)
switch (ch) {
case ' ':
r->space_in_uri = 1;
break;
return NGX_ERROR;
case '#':
r->complex_uri = 1;
break;

2
src/http/ngx_http_request.c
View File

@ -1264,7 +1264,7 @@ ngx_http_process_request_uri(ngx_http_request_t *r)
r->unparsed_uri.len = r->uri_end - r->uri_start;
r->unparsed_uri.data = r->uri_start;
r->valid_unparsed_uri = (r->space_in_uri || r->empty_path_in_uri) ? 0 : 1;
r->valid_unparsed_uri = r->empty_path_in_uri ? 0 : 1;
if (r->uri_ext) {
if (r->args_start) {

3
src/http/ngx_http_request.h
View File

@ -468,9 +468,6 @@ struct ngx_http_request_s {
/* URI with "+" */
unsigned plus_in_uri:1;
/* URI with " " */
unsigned space_in_uri:1;
/* URI with empty path */
unsigned empty_path_in_uri:1;