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Bug #49800 SimpleXML allow serialize() calls without warning
Submitted: 2009-10-07 09:09 UTC Modified: 2009-10-07 12:46 UTC
From: wmeler at wp-sa dot pl Assigned:
Status: Closed Package: SimpleXML related
PHP Version: 5.3.0 OS: any
Private report: No CVE-ID:
 [2009-10-07 09:09 UTC] wmeler at wp-sa dot pl
simplexml allows serialization which can (and should) be easily forbidden with following patch

--- php-5.3.0/ext/simplexml/simplexml.c 2009-06-11 11:41:15.000000000 +0200
+++ arisphp5/php/ext/simplexml/simplexml.c      2009-10-06 18:39:54.000652000 +0200
@@ -2526,6 +2526,8 @@
        sxe_class_entry = zend_register_internal_class(&sxe TSRMLS_CC);
        sxe_class_entry->get_iterator = php_sxe_get_iterator;
        sxe_class_entry->iterator_funcs.funcs = &php_sxe_iterator_funcs;
+       sxe_class_entry->serialize = zend_class_serialize_deny;
+       sxe_class_entry->unserialize = zend_class_unserialize_deny;
        zend_class_implements(sxe_class_entry TSRMLS_CC, 1, zend_ce_traversable);
        sxe_object_handlers.get_method = zend_get_std_object_handlers()->get_method;
        sxe_object_handlers.get_constructor = zend_get_std_object_handlers()->get_constructor;

Reproduce code:
echo serialize(simplexml_load_string("<xml/>"));

Expected result:
Exception: Serialization of 'SimpleXMLElement' is not allowed in ...

Actual result:


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 [2009-10-07 12:46 UTC]
Automatic comment from SVN on behalf of iliaa
Log: Fixed bug #49800 (SimpleXML allow (un)serialize() calls without warning).

# original patch by wmeler at wp-sa dot pl
 [2009-10-07 12:46 UTC]
This bug has been fixed in SVN.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
Thank you for the report, and for helping us make PHP better.

 [2010-04-19 17:42 UTC] admin at fazigame dot com
Well I have problem because I have serialize(debug_backtrace()) and in backtrace I have simplexml and I got error "Serialization of 'SimpleXMLElement' is not allowed"

I can do for each all backtrace and remove this but shoudl be able to seriazlie backtrace...
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