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TITLE:
PHP "readfile()" Denial of Service

SECUNIA ADVISORY ID:
SA14409

VERIFY ADVISORY:
http://secunia.com/advisories/14409/

CRITICAL:
Less critical

IMPACT:
DoS

WHERE:
>From remote

SOFTWARE:
PHP 4.0.x
http://secunia.com/product/1655/
PHP 4.1.x
http://secunia.com/product/1654/
PHP 4.2.x
http://secunia.com/product/105/
PHP 4.3.x
http://secunia.com/product/922/

DESCRIPTION:
A vulnerability has been reported in PHP, which can be exploited by
malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an error in the "readfile()"
function when accessing files with a size multiple times larger than
the underlying architecture's page size. This can reportedly be
exploited to crash the httpd process running the PHP code.

This has been reported in PHP version 4.

SOLUTION:
Restrict access to PHP code using "readfile()" to open untrusted
files.

PROVIDED AND/OR DISCOVERED BY:
Reported in a SUSE advisory.

ORIGINAL ADVISORY:
http://www.novell.com/linux/security/advisories/2005_06_sr.html

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

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Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
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