[ZendTo] Re: Question related to version of PHP in CentOS VM's

Thu Aug 19 14:21:57 BST 2010

My intent was not to create a discussion on how open to attack PHP is related to other products.

Nesuus was obviously displaying high importance alerts based on the PHP banner version that was being returned when I still had expose=on in the php.ini.  

If you are saying that all the vulnerabilities that are present in the version that is installed can only be exploited with poorly coded PHP code, then I am not concerned if Jules is not ..

BRIAN M. DUNCAN
Data Security Administrator
Katten Muchin Rosenman LLP
525 W. Monroe Street / Chicago, IL 60661-3693
p / (312) 577-8045 f / (312) 577-4490
brian.duncan at kattenlaw.com / www.kattenlaw.com

________________________________

From: zendto-bounces at zend.to [mailto:zendto-bounces at zend.to] On Behalf Of Sergio Rabellino
Sent: Wednesday, August 18, 2010 6:08 PM
To: zendto at zend.to
Subject: [ZendTo] Re: Question related to version of PHP in CentOS VM's

I'm running php web sites along 10 years, i'd never had a succesful attack to php itself, but only to bad (php) programmers.
I think that nessus it's very conservative in its results, but not every buffer overflow can lead to a breach in your system.
What programming language/environment you believe it's unfaceable ? Tomcat/Java or whatsoever ? :-)

regards.

Duncan, Brian M. ha scritto: 

	I've always shied away from using PHP with apache on externally facing web sites in the past due to always seeing a constant flow of new vulnerabilities.

	Does anyone know if the version of PHP that is current according to CentOS safe?

	I ran a Nessus scan against my Zendto box and it is listing 6 "HIGH" security risks so far that are supposedly tied to PHP version.  I just noticed they all refer so far to using PHP 5.2.5 or later.  Not sure if any of these are false positives yet.

	Here is some of the Nessus "HIGH" security scan listed output for any interested:

PHP < 5.2.5 Multiple Vulnerabilities	

Synopsis:
The remote web server uses a version of PHP that is affected by multiple flaws.

Description:
According to its banner, the version of PHP installed on the remote host is older than 5.2.5. Such versions may be affected by various issues, including but not limited to several buffer overflows.

Risk factor:
High

CVSS Base Score:7.5
CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

See also:
http://www.php.net/releases/5_2_5.php

Solution:
Upgrade to PHP version 5.2.5 or later.

Plugin output:
PHP version 5.1.6 appears to be running on the remote host based on the following X-Powered-By response header : X-Powered-By: PHP/5.1.6 

Plugin ID:
28181 <http://www.nessus.org/plugins/index.php?view=single&id=28181> 

CVE: 
CVE-2007-4887, CVE-2007-5898, CVE-2007-5900

BID: 
26403 <http://www.securityfocus.com/bid/26403> 

Other references: 
OSVDB:38680, OSVDB:38681, OSVDB:38682, OSVDB:38683, OSVDB:38684, OSVDB:38685
PHP < 5.2.1 Multiple Vulnerabilities	

Synopsis:
The remote web server uses a version of PHP that is affected by multiple flaws.

Description:
According to its banner, the version of PHP installed on the remote host is older than 5.2.1. Such versions may be affected by several issues, including buffer overflows, format string vulnerabilities, arbitrary code execution, 'safe_mode' and 'open_basedir' bypasses, and clobbering of super-globals.

Risk factor:
High

CVSS Base Score:7.5
CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

See also:
http://www.php.net/releases/5_2_1.php

Solution:
Upgrade to PHP version 5.2.1 or later.

Plugin output:
PHP version 5.1.6 appears to be running on the remote host based on the following X-Powered-By response header : X-Powered-By: PHP/5.1.6 

Plugin ID:
24907 <http://www.nessus.org/plugins/index.php?view=single&id=24907> 

CVE: 
CVE-2006-6383, CVE-2007-0905, CVE-2007-0906, CVE-2007-0907, CVE-2007-0908, CVE-2007-0909, CVE-2007-0910, CVE-2007-1376, CVE-2007-1380, CVE-2007-1453, CVE-2007-1700, CVE-2007-1701, CVE-2007-1824, CVE-2007-1825, CVE-2007-1884, CVE-2007-1885, CVE-2007-1886, CVE-2007-1887, CVE-2007-1890

BID: 
21508 <http://www.securityfocus.com/bid/21508> , 22496 <http://www.securityfocus.com/bid/22496> , 22805 <http://www.securityfocus.com/bid/22805> , 22806 <http://www.securityfocus.com/bid/22806> , 22862 <http://www.securityfocus.com/bid/22862> , 22922 <http://www.securityfocus.com/bid/22922> , 23119 <http://www.securityfocus.com/bid/23119> , 23120 <http://www.securityfocus.com/bid/23120> , 23219 <http://www.securityfocus.com/bid/23219> , 23233 <http://www.securityfocus.com/bid/23233> , 23234 <http://www.securityfocus.com/bid/23234> , 23235 <http://www.securityfocus.com/bid/23235> , 23236 <http://www.securityfocus.com/bid/23236> , 23237 <http://www.securityfocus.com/bid/23237> , 23238 <http://www.securityfocus.com/bid/23238> 

Other references: 
OSVDB:32763, OSVDB:32764, OSVDB:32765, OSVDB:32766, OSVDB:32767, OSVDB:32768, OSVDB:32776, OSVDB:32781, OSVDB:33269, OSVDB:33933, OSVDB:33944, OSVDB:33945, OSVDB:33955, OSVDB:33957, OSVDB:33958, OSVDB:33959, OSVDB:33960, OSVDB:34767
PHP < 5.2.4 Multiple Vulnerabilities	

Synopsis:
The remote web server uses a version of PHP that is affected by multiple flaws.

Description:
According to its banner, the version of PHP installed on the remote host is older than 5.2.4. Such versions may be affected by various issues, including but not limited to several overflows.

Risk factor:
High

CVSS Base Score:7.5
CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

See also:
http://www.php.net/releases/5_2_4.php

Solution:
Upgrade to PHP version 5.2.4 or later.

Plugin output:
PHP version 5.1.6 appears to be running on the remote host based on the following X-Powered-By response header : X-Powered-By: PHP/5.1.6 

Plugin ID:
25971 <http://www.nessus.org/plugins/index.php?view=single&id=25971> 

CVE: 
CVE-2007-2872, CVE-2007-3378, CVE-2007-3806

BID: 
24661 <http://www.securityfocus.com/bid/24661> , 24261 <http://www.securityfocus.com/bid/24261> , 24922 <http://www.securityfocus.com/bid/24922> , 25498 <http://www.securityfocus.com/bid/25498> 

Other references: 
OSVDB:36083, OSVDB:36085, OSVDB:36869
PHP < 5.2 Multiple Vulnerabilities	

Synopsis:
The remote web server uses a version of PHP that is affected by multiple buffer overflows.

Description:
According to its banner, the version of PHP installed on the remote host is older than 5.2. Such versions may be affected by several buffer overflows. To exploit these issues, an attacker would need the ability to upload an arbitrary PHP script on the remote server, or to be able to manipulate several variables processed by some PHP functions such as htmlentities().

Risk factor:
High

CVSS Base Score:7.5
CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

See also:
http://www.php.net/releases/5_2_0.php

Solution:
Upgrade to PHP version 5.2.0 or later.

Plugin output:
PHP version 5.1.6 appears to be running on the remote host based on the following X-Powered-By response header : X-Powered-By: PHP/5.1.6 

Plugin ID:
31649 <http://www.nessus.org/plugins/index.php?view=single&id=31649> 

CVE: 
CVE-2006-5465

BID: 
20879 <http://www.securityfocus.com/bid/20879> 

Other references: 
OSVDB:30178, OSVDB:30179
PHP 5 < 5.2.7 Multiple Vulnerabilities	

Synopsis:
The remote web server uses a version of PHP that is affected by multiple flaws.

Description:
According to its banner, the version of PHP installed on the remote host is older than 5.2.7. Such versions may be affected by several security issues : - File truncation can occur when calling 'dba_replace()' with an invalid argument. - There is a buffer overflow in the bundled PCRE library fixed by 7.8. (CVE-2008-2371) - A buffer overflow in the 'imageloadfont()' function in 'ext/gd/gd.c' can be triggered when a specially crafted font is given. (CVE-2008-3658) - There is a buffer overflow in PHP's internal function 'memnstr()', which is exposed to userspace as 'explode()'. (CVE-2008-3659) - When used as a FastCGI module, PHP segfaults when opening a file whose name contains two dots (eg, 'file..php'). (CVE-2008-3660) - Multiple directory traversal vulnerabilities in functions such as 'posix_access()', 'chdir()', 'ftok()' may allow a remote attacker to bypass 'safe_mode' restrictions. (CVE-2008-2665 and CVE-2008-2666). - A buffer overflow may be triggered when processing long message headers in 'php_imap.c' due to use of an obsolete API call. (CVE-2008-2829) - A heap-based buffer overflow may be triggered via a call to 'mb_check_encoding()', part of the 'mbstring' extension. (CVE-2008-5557) - Missing initialization of 'BG(page_uid)' and 'BG(page_gid)' when PHP is used as an Apache module may allow for bypassing security restriction due to SAPI 'php_getuid()' overloading. (CVE-2008-5624) - Incorrect 'php_value' order for Apache configuration may allow bypassing PHP's 'safe_mode' setting. (CVE-2008-5625) - The ZipArchive:extractTo() method in the ZipArchive extension fails to filter directory traversal sequences from file names. (CVE-2008-5658)

Risk factor:
High

CVSS Base Score:7.5
CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

See also:
http://securityreason.com/achievement_securityalert/57

See also:
http://securityreason.com/achievement_securityalert/58

See also:
http://securityreason.com/achievement_securityalert/59

See also:
http://www.sektioneins.de/advisories/SE-2008-06.txt

See also:
http://archives.neohapsis.com/archives/fulldisclosure/2008-06/0238.html

See also:
http://archives.neohapsis.com/archives/fulldisclosure/2008-06/0239.html

See also:
http://www.openwall.com/lists/oss-security/2008/08/08/2

See also:
http://www.openwall.com/lists/oss-security/2008/08/13/8

See also:
http://archives.neohapsis.com/archives/fulldisclosure/2008-11/0433.html

See also:
http://archives.neohapsis.com/archives/fulldisclosure/2008-12/0089.html

See also:
http://bugs.php.net/bug.php?id=42862

See also:
http://bugs.php.net/bug.php?id=45151

See also:
http://bugs.php.net/bug.php?id=45722

See also:
http://www.php.net/releases/5_2_7.php

See also:
http://www.php.net/ChageLog-5.php#5.2.7

Solution:
Upgrade to PHP version 5.2.8 or later. Note that 5.2.7 was been removed from distribution because of a regression in that version that results in the 'magic_quotes_gpc' setting remaining off even if it was set to on.

Plugin output:
PHP version 5.1.6 appears to be running on the remote host based on the following X-Powered-By response header : X-Powered-By: PHP/5.1.6 

Plugin ID:
35043 <http://www.nessus.org/plugins/index.php?view=single&id=35043> 

CVE: 
CVE-2008-2371, CVE-2008-2665, CVE-2008-2666, CVE-2008-2829, CVE-2008-3658, CVE-2008-3659, CVE-2008-3660, CVE-2008-5557, CVE-2008-5624, CVE-2008-5625, CVE-2008-5658

BID: 
29796 <http://www.securityfocus.com/bid/29796> , 29797 <http://www.securityfocus.com/bid/29797> , 29829 <http://www.securityfocus.com/bid/29829> , 30087 <http://www.securityfocus.com/bid/30087> , 30649 <http://www.securityfocus.com/bid/30649> , 31612 <http://www.securityfocus.com/bid/31612> , 32383 <http://www.securityfocus.com/bid/32383> , 32625 <http://www.securityfocus.com/bid/32625> , 32688 <http://www.securityfocus.com/bid/32688> , 32948 <http://www.securityfocus.com/bid/32948> 

Other references: 
OSVDB:46584, OSVDB:46638, OSVDB:46639, OSVDB:46641, OSVDB:46690, OSVDB:47796, OSVDB:47797, OSVDB:47798, OSVDB:50480, OSVDB:51477, OSVDB:52205, OSVDB:52206, OSVDB:52207
PHP < 5.2.6 Multiple Vulnerabilities	

Synopsis:
The remote web server uses a version of PHP that is affected by multiple flaws.

Description:
According to its banner, the version of PHP installed on the remote host is older than 5.2.6. Such versions may be affected by the following issues : - A stack buffer overflow in FastCGI SAPI. - An integer overflow in printf(). - An security issue arising from improper calculation of the length of PATH_TRANSLATED in cgi_main.c. - A safe_mode bypass in cURL. - Incomplete handling of multibyte chars inside escapeshellcmd(). - Issues in the bundled PCRE fixed by version 7.6.

Risk factor:
High

CVSS Base Score:7.5
CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

See also:
http://archives.neohapsis.com/archives/bugtraq/2008-03/0321.html

See also:
http://archives.neohapsis.com/archives/fulldisclosure/2008-05/0103.html

See also:
http://archives.neohapsis.com/archives/fulldisclosure/2008-05/0107.html

See also:
http://www.php.net/releases/5_2_6.php

Solution:
Upgrade to PHP version 5.2.6 or later.

Plugin output:
PHP version 5.1.6 appears to be running on the remote host based on the following X-Powered-By response header : X-Powered-By: PHP/5.1.6 

Plugin ID:
32123 <http://www.nessus.org/plugins/index.php?view=single&id=32123> 

CVE: 
CVE-2007-4850, CVE-2008-0599, CVE-2008-1384, CVE-2008-2050, CVE-2008-2051

BID: 
27413 <http://www.securityfocus.com/bid/27413> , 28392 <http://www.securityfocus.com/bid/28392> , 29009 <http://www.securityfocus.com/bid/29009> 

Other references: 
OSVDB:43219, OSVDB:44057, OSVDB:44906, OSVDB:44907, OSVDB:44908, Secunia:30048

	BRIAN M. DUNCAN
	Data Security Administrator
	Katten Muchin Rosenman LLP
	525 W. Monroe Street / Chicago, IL 60661-3693
	p / (312) 577-8045 f / (312) 577-4490
	brian.duncan at kattenlaw.com / www.kattenlaw.com

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-- 

Ing. Sergio Rabellino

Università degli Studi di Torino
Dipartimento di Informatica
ICT Services Director
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