php.net |  support |  documentation |  report a bug |  advanced search |  search howto |  statistics |  random bug |  login
Bug #62443 Crypt SHA256/512 Segfaults With Malformed Salt
Submitted: 2012-06-29 00:02 UTC Modified: 2012-06-29 02:48 UTC
From: ircmaxell@php.net Assigned: ircmaxell (profile)
Status: Closed Package: Reproducible crash
PHP Version: master-Git-2012-06-28 (Git) OS: All
Private report: No CVE-ID: None
Welcome back! If you're the original bug submitter, here's where you can edit the bug or add additional notes.
If you forgot your password, you can retrieve your password here.
Password:
Status:
Package:
Bug Type:
Summary:
From: ircmaxell@php.net
New email:
PHP Version: OS:

 

 [2012-06-29 00:02 UTC] ircmaxell@php.net
Description:
------------
Crypt() SHA256 and SHA512 segfault when passed a salt that contains a null byte. 
This is because the emalloc call and the memset call use different length inputs 
for the `output` string.  The memset call then overflows the buffer.

Test script:
---------------
<?php
crypt("foo", '$5$'.chr(0).'abc');
?>

and

<?php
crypt("foo", '$6$'.chr(0).'abc');
?>

Expected result:
----------------
No output

Actual result:
--------------
Either segmentation fault (sha512) or zend_mm_heap corrupted (sha256)

Patches

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2012-06-29 00:12 UTC] ircmaxell@php.net
-Status: Open +Status: Assigned -Assigned To: +Assigned To: ircmaxell
 [2012-06-29 01:03 UTC] ircmaxell@php.net
Automatic comment on behalf of ircmaxell@ircmaxell.com
Revision: http://git.php.net/?p=php-src.git;a=commit;h=7e8276ca68fc622124d51d18e4f7b5cde3536de4
Log: Fixed bug #62443 (Crypt SHA256/512 Segfaults With Malformed Salt)
 [2012-06-29 02:48 UTC] ircmaxell@php.net
This has been fixed in the 5.3, 5.4 and master branches.
 [2012-06-29 02:48 UTC] ircmaxell@php.net
-Status: Assigned +Status: Closed
 [2014-10-07 23:24 UTC] stas@php.net
Automatic comment on behalf of ircmaxell@ircmaxell.com
Revision: http://git.php.net/?p=php-src-security.git;a=commit;h=7e8276ca68fc622124d51d18e4f7b5cde3536de4
Log: Fixed bug #62443 (Crypt SHA256/512 Segfaults With Malformed Salt)
 [2014-10-07 23:35 UTC] stas@php.net
Automatic comment on behalf of ircmaxell@ircmaxell.com
Revision: http://git.php.net/?p=php-src-security.git;a=commit;h=7e8276ca68fc622124d51d18e4f7b5cde3536de4
Log: Fixed bug #62443 (Crypt SHA256/512 Segfaults With Malformed Salt)
 
PHP Copyright © 2001-2024 The PHP Group
All rights reserved.
Last updated: Wed Oct 09 17:01:27 2024 UTC