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Category:   Application (Generic)  >   PHP Vendors:   PHP Group
(Red Hat Issues Fix) PHP mb_strcut() May Disclose Potentially Sensitive Information
SecurityTracker Alert ID:  1025023
SecurityTracker URL:  http://securitytracker.com/id/1025023
CVE Reference:   CVE-2010-4156   (Links to External Site)
Date:  Feb 3 2011
Impact:   Disclosure of system information, Disclosure of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 5.3.3 and prior 5.3.x versions
Description:   A vulnerability was reported in PHP. A remote user can obtain potentially sensitive information.

A user can supply a specially crafted 'length' parameter to the mb_strcut() function in 'ext/mbstring/libmbfl/mbfl/mbfilter.c' to cause the system to disclose potentially sensitive information.

The specific impact depends on the applications that use the vulnerable function.

Mateusz Kocielski reported this vulnerability.

Impact:   A remote user may be able to obtain potentially sensitive information.
Solution:   Red Hat has issued a fix.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2011-0196.html

Vendor URL:  www.php.net/ (Links to External Site)
Cause:   Access control error
Underlying OS:   Linux (Red Hat Enterprise)

Message History:   This archive entry is a follow-up to the message listed below.
Nov 13 2010 PHP mb_strcut() May Disclose Potentially Sensitive Information



 Source Message Contents

Date:  Thu, 3 Feb 2011 13:22:24 -0700
Subject:  [RHSA-2011:0196-01] Moderate: php53 security update

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

=====================================================================
                   Red Hat Security Advisory

Synopsis:          Moderate: php53 security update
Advisory ID:       RHSA-2011:0196-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2011-0196.html
Issue date:        2011-02-03
CVE Names:         CVE-2010-3710 CVE-2010-4156 CVE-2010-4645 
=====================================================================

1. Summary:

Updated php53 packages that fix three security issues are now available for
Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having moderate
security impact. Common Vulnerability Scoring System (CVSS) base scores,
which give detailed severity ratings, are available for each vulnerability
from the CVE links in the References section.

2. Relevant releases/architectures:

RHEL Desktop Workstation (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64

3. Description:

PHP is an HTML-embedded scripting language commonly used with the Apache
HTTP Server.

A flaw was found in the way PHP converted certain floating point values
from string representation to a number. If a PHP script evaluated an
attacker's input in a numeric context, the PHP interpreter could cause high
CPU usage until the script execution time limit is reached. This issue only
affected i386 systems. (CVE-2010-4645)

A stack memory exhaustion flaw was found in the way the PHP filter_var()
function validated email addresses. An attacker could use this flaw to
crash the PHP interpreter by providing excessively long input to be
validated as an email address. (CVE-2010-3710)

A memory disclosure flaw was found in the PHP multi-byte string extension.
If the mb_strcut() function was called with a length argument exceeding the
input string size, the function could disclose a portion of the PHP
interpreter's memory. (CVE-2010-4156)

All php53 users should upgrade to these updated packages, which contain
backported patches to resolve these issues. After installing the updated
packages, the httpd daemon must be restarted for the update to take effect.

4. Solution:

Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/docs/DOC-11259

5. Bugs fixed (http://bugzilla.redhat.com/):

646684 - CVE-2010-3710 php: DoS in filter_var() via long email string
651682 - CVE-2010-4156 php information disclosure via mb_strcut()
667806 - CVE-2010-4645 php: hang on numeric value 2.2250738585072011e-308 with x87 fpu

6. Package List:

RHEL Desktop Workstation (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/php53-5.3.3-1.el5_6.1.src.rpm

i386:
php53-5.3.3-1.el5_6.1.i386.rpm
php53-bcmath-5.3.3-1.el5_6.1.i386.rpm
php53-cli-5.3.3-1.el5_6.1.i386.rpm
php53-common-5.3.3-1.el5_6.1.i386.rpm
php53-dba-5.3.3-1.el5_6.1.i386.rpm
php53-debuginfo-5.3.3-1.el5_6.1.i386.rpm
php53-devel-5.3.3-1.el5_6.1.i386.rpm
php53-gd-5.3.3-1.el5_6.1.i386.rpm
php53-imap-5.3.3-1.el5_6.1.i386.rpm
php53-intl-5.3.3-1.el5_6.1.i386.rpm
php53-ldap-5.3.3-1.el5_6.1.i386.rpm
php53-mbstring-5.3.3-1.el5_6.1.i386.rpm
php53-mysql-5.3.3-1.el5_6.1.i386.rpm
php53-odbc-5.3.3-1.el5_6.1.i386.rpm
php53-pdo-5.3.3-1.el5_6.1.i386.rpm
php53-pgsql-5.3.3-1.el5_6.1.i386.rpm
php53-process-5.3.3-1.el5_6.1.i386.rpm
php53-pspell-5.3.3-1.el5_6.1.i386.rpm
php53-snmp-5.3.3-1.el5_6.1.i386.rpm
php53-soap-5.3.3-1.el5_6.1.i386.rpm
php53-xml-5.3.3-1.el5_6.1.i386.rpm
php53-xmlrpc-5.3.3-1.el5_6.1.i386.rpm

x86_64:
php53-5.3.3-1.el5_6.1.x86_64.rpm
php53-bcmath-5.3.3-1.el5_6.1.x86_64.rpm
php53-cli-5.3.3-1.el5_6.1.x86_64.rpm
php53-common-5.3.3-1.el5_6.1.x86_64.rpm
php53-dba-5.3.3-1.el5_6.1.x86_64.rpm
php53-debuginfo-5.3.3-1.el5_6.1.x86_64.rpm
php53-devel-5.3.3-1.el5_6.1.x86_64.rpm
php53-gd-5.3.3-1.el5_6.1.x86_64.rpm
php53-imap-5.3.3-1.el5_6.1.x86_64.rpm
php53-intl-5.3.3-1.el5_6.1.x86_64.rpm
php53-ldap-5.3.3-1.el5_6.1.x86_64.rpm
php53-mbstring-5.3.3-1.el5_6.1.x86_64.rpm
php53-mysql-5.3.3-1.el5_6.1.x86_64.rpm
php53-odbc-5.3.3-1.el5_6.1.x86_64.rpm
php53-pdo-5.3.3-1.el5_6.1.x86_64.rpm
php53-pgsql-5.3.3-1.el5_6.1.x86_64.rpm
php53-process-5.3.3-1.el5_6.1.x86_64.rpm
php53-pspell-5.3.3-1.el5_6.1.x86_64.rpm
php53-snmp-5.3.3-1.el5_6.1.x86_64.rpm
php53-soap-5.3.3-1.el5_6.1.x86_64.rpm
php53-xml-5.3.3-1.el5_6.1.x86_64.rpm
php53-xmlrpc-5.3.3-1.el5_6.1.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/php53-5.3.3-1.el5_6.1.src.rpm

i386:
php53-5.3.3-1.el5_6.1.i386.rpm
php53-bcmath-5.3.3-1.el5_6.1.i386.rpm
php53-cli-5.3.3-1.el5_6.1.i386.rpm
php53-common-5.3.3-1.el5_6.1.i386.rpm
php53-dba-5.3.3-1.el5_6.1.i386.rpm
php53-debuginfo-5.3.3-1.el5_6.1.i386.rpm
php53-devel-5.3.3-1.el5_6.1.i386.rpm
php53-gd-5.3.3-1.el5_6.1.i386.rpm
php53-imap-5.3.3-1.el5_6.1.i386.rpm
php53-intl-5.3.3-1.el5_6.1.i386.rpm
php53-ldap-5.3.3-1.el5_6.1.i386.rpm
php53-mbstring-5.3.3-1.el5_6.1.i386.rpm
php53-mysql-5.3.3-1.el5_6.1.i386.rpm
php53-odbc-5.3.3-1.el5_6.1.i386.rpm
php53-pdo-5.3.3-1.el5_6.1.i386.rpm
php53-pgsql-5.3.3-1.el5_6.1.i386.rpm
php53-process-5.3.3-1.el5_6.1.i386.rpm
php53-pspell-5.3.3-1.el5_6.1.i386.rpm
php53-snmp-5.3.3-1.el5_6.1.i386.rpm
php53-soap-5.3.3-1.el5_6.1.i386.rpm
php53-xml-5.3.3-1.el5_6.1.i386.rpm
php53-xmlrpc-5.3.3-1.el5_6.1.i386.rpm

ia64:
php53-5.3.3-1.el5_6.1.ia64.rpm
php53-bcmath-5.3.3-1.el5_6.1.ia64.rpm
php53-cli-5.3.3-1.el5_6.1.ia64.rpm
php53-common-5.3.3-1.el5_6.1.ia64.rpm
php53-dba-5.3.3-1.el5_6.1.ia64.rpm
php53-debuginfo-5.3.3-1.el5_6.1.ia64.rpm
php53-devel-5.3.3-1.el5_6.1.ia64.rpm
php53-gd-5.3.3-1.el5_6.1.ia64.rpm
php53-imap-5.3.3-1.el5_6.1.ia64.rpm
php53-intl-5.3.3-1.el5_6.1.ia64.rpm
php53-ldap-5.3.3-1.el5_6.1.ia64.rpm
php53-mbstring-5.3.3-1.el5_6.1.ia64.rpm
php53-mysql-5.3.3-1.el5_6.1.ia64.rpm
php53-odbc-5.3.3-1.el5_6.1.ia64.rpm
php53-pdo-5.3.3-1.el5_6.1.ia64.rpm
php53-pgsql-5.3.3-1.el5_6.1.ia64.rpm
php53-process-5.3.3-1.el5_6.1.ia64.rpm
php53-pspell-5.3.3-1.el5_6.1.ia64.rpm
php53-snmp-5.3.3-1.el5_6.1.ia64.rpm
php53-soap-5.3.3-1.el5_6.1.ia64.rpm
php53-xml-5.3.3-1.el5_6.1.ia64.rpm
php53-xmlrpc-5.3.3-1.el5_6.1.ia64.rpm

ppc:
php53-5.3.3-1.el5_6.1.ppc.rpm
php53-bcmath-5.3.3-1.el5_6.1.ppc.rpm
php53-cli-5.3.3-1.el5_6.1.ppc.rpm
php53-common-5.3.3-1.el5_6.1.ppc.rpm
php53-dba-5.3.3-1.el5_6.1.ppc.rpm
php53-debuginfo-5.3.3-1.el5_6.1.ppc.rpm
php53-devel-5.3.3-1.el5_6.1.ppc.rpm
php53-gd-5.3.3-1.el5_6.1.ppc.rpm
php53-imap-5.3.3-1.el5_6.1.ppc.rpm
php53-intl-5.3.3-1.el5_6.1.ppc.rpm
php53-ldap-5.3.3-1.el5_6.1.ppc.rpm
php53-mbstring-5.3.3-1.el5_6.1.ppc.rpm
php53-mysql-5.3.3-1.el5_6.1.ppc.rpm
php53-odbc-5.3.3-1.el5_6.1.ppc.rpm
php53-pdo-5.3.3-1.el5_6.1.ppc.rpm
php53-pgsql-5.3.3-1.el5_6.1.ppc.rpm
php53-process-5.3.3-1.el5_6.1.ppc.rpm
php53-pspell-5.3.3-1.el5_6.1.ppc.rpm
php53-snmp-5.3.3-1.el5_6.1.ppc.rpm
php53-soap-5.3.3-1.el5_6.1.ppc.rpm
php53-xml-5.3.3-1.el5_6.1.ppc.rpm
php53-xmlrpc-5.3.3-1.el5_6.1.ppc.rpm

s390x:
php53-5.3.3-1.el5_6.1.s390x.rpm
php53-bcmath-5.3.3-1.el5_6.1.s390x.rpm
php53-cli-5.3.3-1.el5_6.1.s390x.rpm
php53-common-5.3.3-1.el5_6.1.s390x.rpm
php53-dba-5.3.3-1.el5_6.1.s390x.rpm
php53-debuginfo-5.3.3-1.el5_6.1.s390x.rpm
php53-devel-5.3.3-1.el5_6.1.s390x.rpm
php53-gd-5.3.3-1.el5_6.1.s390x.rpm
php53-imap-5.3.3-1.el5_6.1.s390x.rpm
php53-intl-5.3.3-1.el5_6.1.s390x.rpm
php53-ldap-5.3.3-1.el5_6.1.s390x.rpm
php53-mbstring-5.3.3-1.el5_6.1.s390x.rpm
php53-mysql-5.3.3-1.el5_6.1.s390x.rpm
php53-odbc-5.3.3-1.el5_6.1.s390x.rpm
php53-pdo-5.3.3-1.el5_6.1.s390x.rpm
php53-pgsql-5.3.3-1.el5_6.1.s390x.rpm
php53-process-5.3.3-1.el5_6.1.s390x.rpm
php53-pspell-5.3.3-1.el5_6.1.s390x.rpm
php53-snmp-5.3.3-1.el5_6.1.s390x.rpm
php53-soap-5.3.3-1.el5_6.1.s390x.rpm
php53-xml-5.3.3-1.el5_6.1.s390x.rpm
php53-xmlrpc-5.3.3-1.el5_6.1.s390x.rpm

x86_64:
php53-5.3.3-1.el5_6.1.x86_64.rpm
php53-bcmath-5.3.3-1.el5_6.1.x86_64.rpm
php53-cli-5.3.3-1.el5_6.1.x86_64.rpm
php53-common-5.3.3-1.el5_6.1.x86_64.rpm
php53-dba-5.3.3-1.el5_6.1.x86_64.rpm
php53-debuginfo-5.3.3-1.el5_6.1.x86_64.rpm
php53-devel-5.3.3-1.el5_6.1.x86_64.rpm
php53-gd-5.3.3-1.el5_6.1.x86_64.rpm
php53-imap-5.3.3-1.el5_6.1.x86_64.rpm
php53-intl-5.3.3-1.el5_6.1.x86_64.rpm
php53-ldap-5.3.3-1.el5_6.1.x86_64.rpm
php53-mbstring-5.3.3-1.el5_6.1.x86_64.rpm
php53-mysql-5.3.3-1.el5_6.1.x86_64.rpm
php53-odbc-5.3.3-1.el5_6.1.x86_64.rpm
php53-pdo-5.3.3-1.el5_6.1.x86_64.rpm
php53-pgsql-5.3.3-1.el5_6.1.x86_64.rpm
php53-process-5.3.3-1.el5_6.1.x86_64.rpm
php53-pspell-5.3.3-1.el5_6.1.x86_64.rpm
php53-snmp-5.3.3-1.el5_6.1.x86_64.rpm
php53-soap-5.3.3-1.el5_6.1.x86_64.rpm
php53-xml-5.3.3-1.el5_6.1.x86_64.rpm
php53-xmlrpc-5.3.3-1.el5_6.1.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2010-3710.html
https://www.redhat.com/security/data/cve/CVE-2010-4156.html
https://www.redhat.com/security/data/cve/CVE-2010-4645.html
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://www.redhat.com/security/team/contact/

Copyright 2011 Red Hat, Inc.
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