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Bug #40634 invalid pointer in ext/standard/head.c(140)
Submitted: 2007-02-26 01:58 UTC Modified: 2007-02-26 02:12 UTC
From: judas dot iscariote at gmail dot com Assigned:
Status: Closed Package: Reproducible crash
PHP Version: 5CVS-2007-02-26 (CVS) OS: linux
Private report: No CVE-ID: None
View Developer Edit
 [2007-02-26 01:58 UTC] judas dot iscariote at gmail dot com 
Description:
------------
Current 5_2 seems to have a buffer overflow this issue is not present in released versions.

this can be reproduced with php compiled in debug mode.

Reproduce code:
---------------
I dont have reproduce code atm, but it is as easy to load phpmyadmin,log-in (auth type cookie) and the error happends inmediately and permanent.

Expected result:
----------------
no error

Actual result:
--------------
Script:  '/srv/www/htdocs/sql/index.php'
---------------------------------------
/home/cristian/php5/ext/standard/head.c(140) : Block 0x00EA1EC8 status:
Beginning:      OK (allocated on /home/cristian/php5/main/spprintf.c:222, 79 bytes)
    Start:      OK
      End:      Overflown (magic=0x00000073 instead of 0xBBA15242)
                At least 4 bytes overflown
---------------------------------------
[Sun Feb 25 22:49:43 2007]  Script:  '/srv/www/htdocs/sql/index.php'
---------------------------------------
/home/cristian/php5/ext/standard/head.c(140) : Block 0x010914A8 status:
Invalid pointer: ((size=0x000000A9) != (next.prev=0x74617020))
---------------------------------------

hell:~ # rclighttpd restart
Shutting down lighttpd                                                done
Starting lighttpd                                                     done
hell:~ # [Sun Feb 25 22:50:07 2007]  Script:  '/srv/www/htdocs/sql/index.php'
---------------------------------------
/home/cristian/php5/ext/standard/head.c(140) : Block 0x00EA1EC8 status:
Beginning:      OK (allocated on /home/cristian/php5/main/spprintf.c:222, 79 bytes)
    Start:      OK
      End:      Overflown (magic=0x00000073 instead of 0x7B97D628)
                At least 4 bytes overflown
---------------------------------------
[Sun Feb 25 22:50:08 2007]  Script:  '/srv/www/htdocs/sql/index.php'
---------------------------------------
/home/cristian/php5/ext/standard/head.c(140) : Block 0x010914A8 status:
Invalid pointer: ((size=0x000000A9) != (next.prev=0x3D687461))
---------------------------------------

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 [2007-02-26 02:12 UTC] iliaa@php.net 
This bug has been fixed in CVS.

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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