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From Vasileios Kontorinis <bkontori...@gmail.com>
Subject ALERT - canary mismatch on efree() - heap overflow detected
Date Wed, 19 May 2010 23:28:36 GMT
Lately I get a bunch of these errors in my logs:

[Wed May 19 22:26:37 2010] [error] [client 10.17.255.250] ALERT - canary
mismatch on efree() - heap overflow detected (attacker '10.17.255.250', file
'/var/www/oliophp/public_html/taggedEvents.php')
[Wed May 19 22:26:37 2010] [error] [client 10.17.255.250] ALERT - canary
mismatch on efree() - heap overflow detected (attacker '10.17.255.250', file
'/var/www/oliophp/public_html/taggedEvents.php')
[Wed May 19 22:26:37 2010] [error] [client 10.17.255.250] ALERT - canary
mismatch on efree() - heap overflow detected (attacker '10.17.255.250', file
'/var/www/oliophp/public_html/users.php')
[Wed May 19 22:26:37 2010] [error] [client 10.17.255.250] ALERT - canary
mismatch on efree() - heap overflow detected (attacker '10.17.255.250', file
'/var/www/oliophp/public_html/events.php')
[Wed May 19 22:26:37 2010] [error] [client 10.17.255.250] ALERT - canary
mismatch on efree() - heap overflow detected (attacker '10.17.255.250', file
'/var/www/oliophp/public_html/taggedEvents.php')

According to blogs it is a php related issue. Suhosin patch detects a memory
overflow and complains.
I was just wondering if the Olio php code is having any known mem. leaks.

My php version on ubuntu:
PHP 5.2.4-2ubuntu5 with Suhosin-Patch 0.9.6.2 (cli) (built: Feb 27 2008
20:46:51)
Copyright (c) 1997-2007 The PHP Group
Zend Engine v2.2.0, Copyright (c) 1998-2007 Zend Technologies

It's too bad that I do not get a line on the php files that cause this.


Has anyone come across this one before?


-------------------------------------------------------------------
Kontorinis Vasileios
Phd student, University of California San Diego
San Diego, CA 92122
Cell. phone: (858) 717 6899
bkontorinis@gmail.com, vkontori@ucsd.edu
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