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Bug #21039 crash when IV is not set
Submitted: 2002-12-16 02:27 UTC Modified: 2002-12-16 03:09 UTC
From: Assigned:
Status: Closed Package: mcrypt related
PHP Version: 4.3.0RC3 OS: FreeBSD 4.7
Private report: No CVE-ID:
 [2002-12-16 02:27 UTC]
I'm running FreeBSD 4.7 with libmcrypt 2.5.3.

There seems to be a bug in libmcrypt, the crash occurs if you call mcrypt_generic(), but without valid IV. Here's a short script:

$td = mcrypt_module_open ('des', '', 'cbc', '');
$iv = mcrypt_create_iv (mcrypt_enc_get_iv_size ($td), MCRYPT_RAND);
mcrypt_generic_init ($td, substr($nthash, 0, 7));
$res = mcrypt_generic ($td, $challenge);

mcrypt_generic_init ($td, substr($nthash, 0, 7));
mcrypt_generic_init ($td, substr($nthash, 0, 7), $iv);
solves the problem :-)


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 [2002-12-16 02:44 UTC]
Sorry, but your problem does not imply a bug in PHP itself.  For a
list of more appropriate places to ask for help using PHP, please
visit as this bug system is not the
appropriate forum for asking support questions. 

Thank you for your interest in PHP.

libmcrypt author has already been contacted with the fix to the problem.
 [2002-12-16 02:45 UTC]
WTF? This is a bug, and I just fixed it. About to commit it to CVS.

 [2002-12-16 03:09 UTC]
This bug has been fixed in CVS.

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