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Do not include zero byte in output headers #369

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Do not include zero byte in output headers #369

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9 changes: 4 additions & 5 deletions src/ngx_http_modsecurity_header_filter.c
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Original file line number Diff line number Diff line change
Expand Up @@ -157,10 +157,10 @@ ngx_http_modsecurity_resolv_header_server(ngx_http_request_t *r, ngx_str_t name,
if (r->headers_out.server == NULL) {
if (clcf->server_tokens) {
value.data = (u_char *)ngx_http_server_full_string;
value.len = sizeof(ngx_http_server_full_string);
value.len = sizeof(ngx_http_server_full_string) - 1;
} else {
value.data = (u_char *)ngx_http_server_string;
value.len = sizeof(ngx_http_server_string);
value.len = sizeof(ngx_http_server_string) - 1;
}
} else {
ngx_table_elt_t *h = r->headers_out.server;
Expand Down Expand Up @@ -214,15 +214,14 @@ ngx_http_modsecurity_resolv_header_content_length(ngx_http_request_t *r, ngx_str
{
ngx_http_modsecurity_ctx_t *ctx = NULL;
ngx_str_t value;
char buf[NGX_INT64_LEN+2];
char buf[NGX_INT64_LEN + 1];

ctx = ngx_http_modsecurity_get_module_ctx(r);

if (r->headers_out.content_length_n > 0)
{
ngx_sprintf((u_char *)buf, "%O%Z", r->headers_out.content_length_n);
value.len = (int)(ngx_sprintf((u_char *)buf, "%O", r->headers_out.content_length_n) - (u_char *)buf);
value.data = (unsigned char *)buf;
value.len = strlen(buf);

#if defined(MODSECURITY_SANITY_CHECKS) && (MODSECURITY_SANITY_CHECKS)
ngx_http_modsecurity_store_ctx_header(r, &name, &value);
Expand Down