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Bug #23225 money_format hangs on incorrect format
Submitted: 2003-04-15 07:32 UTC Modified: 2003-04-15 20:08 UTC
From: marcot at tabini dot ca Assigned:
Status: Closed Package: Strings related
PHP Version: 5CVS-2003-04-15 (dev) OS: Linux RH 9
Private report: No CVE-ID:
 [2003-04-15 07:32 UTC] marcot at tabini dot ca
Calling money_format with an apparently correct format

<?php

  setlocale (LC_MONETARY, 'en_US');
  echo money_format ('%#.2n', 1000);

?>

causes PHP to hang (tested with 4.3.1 and 5-dev).

Apparently, strfmon() returns -1 (errno is 22, indicating an invalid parameter) even though the format should theoretically be correct. The -1 is not trapped in strings.c, resulting in a huge string full of binary data being returned.

Here's my suggested patch, returning false on an error from strfmon().

Index: string.c
===================================================================
RCS file: /repository/php4/ext/standard/string.c,v
retrieving revision 1.374
diff -u -r1.374 string.c
--- string.c    13 Apr 2003 22:59:19 -0000      1.374
+++ string.c    15 Apr 2003 12:30:14 -0000
@@ -46,6 +46,7 @@
 #include "php_globals.h"
 #include "basic_functions.h"
 #include "php_smart_str.h"
+#include "zend_operators.h"
 #ifdef ZTS
 #include "TSRM.h"
 #endif
@@ -4372,7 +4373,11 @@
  
        str_len = format_len + 1024;
        str = emalloc(str_len);
-       str_len = strfmon(str, str_len, format, value);
+       str_len = strfmon(str, str_len, format, value);
+
+       if (str_len == -1)
+               RETURN_FALSE;
+
        str[str_len] = 0;
  
        RETURN_STRINGL(erealloc(str, str_len + 1), str_len, 0);






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 [2003-04-15 20:08 UTC] iliaa@php.net
This bug has been fixed in CVS.

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