#34045 [Ver->Csd]: Buffer overflow with serialized object

From: Date: Wed, 10 Aug 2005 06:39:04 +0000
Subject: #34045 [Ver->Csd]: Buffer overflow with serialized object
References: 1  Groups: php.bugs 
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 ID:               34045
 Updated by:       dmitry@php.net
 Reported By:      david dot tulloh at anu dot edu dot au
-Status:           Verified
+Status:           Closed
 Bug Type:         Class/Object related
 Operating System: Debian Linux
 PHP Version:      5CVS-2005-08-09 (dev)
 New Comment:

Fixed in CVS HEAD (6.0) and PHP_5_1.


Previous Comments:
------------------------------------------------------------------------

[2005-08-09 07:21:07] rasmus@php.net

Verified here:
http://lerdorf.com/valgrind.txt

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[2005-08-09 07:15:57] david dot tulloh at anu dot edu dot au

Description:
------------
The attached code triggers what looks to me like a buffer overflow. 
I've been able to reproduce it on two different computers running a
current and slightly older version of PHP CVS.  Reproducable through
both the CLI and Apache2. 

I stumbled across this while trying to extend SimpleTest and then cut
the code back to the smallest reproduceable subset.

I suspect that the problem starts when serializing-deserializing the
singleton object.  All the layers of seemingly redundant OOP are then
required to bring out the error.  I really have no idea why though. 

originally sent to security@php.net.

Reproduce code:
---------------
http://cmhr118130.anu.edu.au:100/overflow.phps

Expected result:
----------------
ClassWithError::__construct - 42 - type = string(14) "BasicSingleton"
ClassWithError::__construct - 44 - type = string(14) "BasicSingleton" 

Actual result:
--------------
(continues past what's shown):
ClassWithError::__construct - 42 - type = string(14) "BasicSingleton"
ClassWithError::__construct - 44 - type = string(137552044) "tI3       
                               PÜ]d_ÀlÔO`F
&&!ðMOClassWithError9@OO¤O1`OÈO 1OøO 1ÈOÐP 


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