diff -up http-parser-2.7.1/http_parser.c.cve http-parser-2.7.1/http_parser.c

--- http-parser-2.7.1/http_parser.c.cve	2019-03-22 22:33:28.577238523 +0100

+++ http-parser-2.7.1/http_parser.c	2019-03-22 22:35:12.237323250 +0100

@@ -29,6 +29,8 @@

 #include <string.h>

 #include <limits.h>

+static uint32_t max_header_size = HTTP_MAX_HEADER_SIZE;

+

 #ifndef ULLONG_MAX

 # define ULLONG_MAX ((uint64_t) -1) /* 2^64-1 */

 #endif

@@ -141,20 +143,20 @@ do {

 } while (0)

 /* Don't allow the total size of the HTTP headers (including the status

- * line) to exceed HTTP_MAX_HEADER_SIZE.  This check is here to protect

+ * line) to exceed max_header_size.  This check is here to protect

  * embedders against denial-of-service attacks where the attacker feeds

  * us a never-ending header that the embedder keeps buffering.

  *

  * This check is arguably the responsibility of embedders but we're doing

  * it on the embedder's behalf because most won't bother and this way we

- * make the web a little safer.  HTTP_MAX_HEADER_SIZE is still far bigger

+ * make the web a little safer.  max_header_size is still far bigger

  * than any reasonable request or response so this should never affect

  * day-to-day operation.

  */

 #define COUNT_HEADER_SIZE(V)                                         \

 do {                                                                 \

   parser->nread += (V);                                              \

-  if (UNLIKELY(parser->nread > (HTTP_MAX_HEADER_SIZE))) {            \

+  if (UNLIKELY(parser->nread > (max_header_size))) {                 \

     SET_ERRNO(HPE_HEADER_OVERFLOW);                                  \

     goto error;                                                      \

   }                                                                  \

@@ -1538,7 +1540,7 @@ reexecute:

               const char* p_lf;

               size_t limit = data + len - p;

-              limit = MIN(limit, HTTP_MAX_HEADER_SIZE);

+              limit = MIN(limit, max_header_size);

               p_cr = (const char*) memchr(p, CR, limit);

               p_lf = (const char*) memchr(p, LF, limit);

@@ -2468,3 +2470,8 @@ http_parser_version(void) {

          HTTP_PARSER_VERSION_MINOR * 0x00100 |

          HTTP_PARSER_VERSION_PATCH * 0x00001;

 }

+

+void

+http_parser_set_max_header_size(uint32_t size) {

+  max_header_size = size;

+}

diff -up http-parser-2.7.1/http_parser.h.cve http-parser-2.7.1/http_parser.h

--- http-parser-2.7.1/http_parser.h.cve	2019-03-22 22:33:37.133245016 +0100

+++ http-parser-2.7.1/http_parser.h	2019-03-22 22:34:03.640265140 +0100

@@ -426,6 +426,9 @@ void http_parser_pause(http_parser *pars

 /* Checks if this is the final chunk of the body. */

 int http_body_is_final(const http_parser *parser);

+/* Change the maximum header size provided at compile time. */

+void http_parser_set_max_header_size(uint32_t size);

+

 #ifdef __cplusplus

 }

 #endif