Navigation Bar Top Applications Support Documentation Vendors Search Index Top Top

php -- _ecalloc Integer Overflow Vulnerability


Stefan Esser reports:

The PHP 5 branch of the PHP source code lacks the protection against possible integer overflows inside ecalloc() that is present in the PHP 4 branch and also for several years part of our Hardening-Patch and our new Suhosin-Patch.

It was discovered that such an integer overflow can be triggered when user input is passed to the unserialize() function. Earlier vulnerabilities in PHP's unserialize() that were also discovered by one of our audits in December 2004 are unrelated to the newly discovered flaw, but they have shown, that the unserialize() function is exposed to user-input in many popular PHP applications. Examples for applications that use the content of COOKIE variables with unserialize() are phpBB and Serendipity.

The successful exploitation of this integer overflow will result in arbitrary code execution.



portaudit: php -- _ecalloc Integer Overflow Vulnerability

Disclaimer: The data contained on this page is derived from the VuXML document, please refer to the the original document for copyright information. The author of portaudit makes no claim of authorship or ownership of any of the information contained herein.

If you have found a vulnerability in a FreeBSD port not listed in the database, please contact the FreeBSD Security Officer. Refer to "FreeBSD Security Information" for more information.

Oliver Eikemeier <>