[TYPO3-english] class.t3lib_htmlmail.php ERROR - canary mismatch on efree() - heap overflow detected

Chris Müller mueller at cyperfection.de
Wed May 5 10:54:25 CEST 2010


Hi Daniel,

I have the same problem with powermail when I send attachments. They get 
"doubled" and the error message appears in the error log. I tracked it 
down to Suhosin, which is a patch for hardening PHP:
http://www.suspekt.org/2008/10/12/suhosin-canary-mismatch-on-efree-heap-overflow-detected/

I tested it with a standard PHP installation without Suhosin and there 
seems to be no problem.

I recognized this problem with the latest debian lenny release.

Regards,
Chris.

Am 04.02.2010 16:15, schrieb Daniel Huf:
> Hi,
>
> I'm getting this error with the sr_feuser_register subscription page.
>
> Running TYPO3 4.3, any clue what it really means ?
>
> [Thu Feb 04 11:34:17 2010] [error] [client 91.203.96.55] ALERT - canary
> mismatch on efree() - heap overflow detected (attacker 'xx.xxx.xx.xx',
> file '/var/www/site/typo3_src-4.3.0/t3lib/class.t3lib_htmlmail.php',
> line 730)
>
> Thanks for your feedback,
> Daniel



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