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Bug #51059 crypt() segfaults on certain salts
Submitted: 2010-02-16 17:50 UTC Modified: 2010-04-08 20:54 UTC
From: joey@php.net Assigned: pajoye (profile)
Status: Closed Package: *Encryption and hash functions
PHP Version: 5.3.2RC2 OS: Linux, Mac OSX
Private report: No CVE-ID: None
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 [2010-02-16 17:50 UTC] joey@php.net 
Description:
------------
Prior to 5.3, crypt() would safely handle certain invalid salts. With the switch to the new DES-based crypt() provider in 5.3, it segfaults.
In discussing this with Pierre, he indicated the problem was in do_des().

Reproduce code:
---------------
<?php
var_dump(crypt('a', '_'));

Expected result:
----------------
string(13) "_$MoLFnWnJ4yk"


Actual result:
--------------
Segmentation fault

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 [2010-02-16 20:18 UTC] jani@php.net 
Quite likely same as bug #50947 ?
 [2010-02-16 23:14 UTC] joey@php.net 
They seem to be superficially the same, but the bug in this case
couldn't really be SAPI-specific, so either the other report is
factually incorrect, or they're different bugs.
 [2010-02-21 18:11 UTC] svn@php.net 
Automatic comment from SVN on behalf of pajoye
Revision: http://svn.php.net/viewvc/?view=revision&revision=295309
Log: - Fix #51059, crypt can fail and return NULL, on almost all implementations
 [2010-02-21 19:58 UTC] pajoye@php.net 
This bug has been fixed in SVN.

Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.
 
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