"canary mismatch on efree()"

Giorgos Keramidas keramida at ceid.upatras.gr
Mon Oct 16 00:38:54 PDT 2006

On 2006-10-14 18:27, Mark <admin at asarian-host.net> wrote:
> Hello,
> I'm running Apache/1.3.37 (Unix) and PHP/4.4.4 with Suhosin-Patch. All of
> a sudden I get this in my log:
> [Sat Oct 14 19:54:32 2006] [error] ALERT - canary mismatch on efree() -
> heap overflow or double efree detected (attacker '', file
> '/www/vhosts/asarian-host.net/htdocs/phpMyAdmin/index.php')
> This is not good. If a simple thing like phpMyAdmin causes it, then I will
> have to disable the Suhosin-Patch (which propably means recompiling from
> scratch, right?).

o   What version of FreeBSD are you using?

o   What php-related and apache-related packages have you installed and
    what options did you use while installing them?

o   Does this happen only with phpMyAdmin or with other PHP scripts too?

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