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Category: Application (Generic) > Php

Vendors: PHP Group

(Red Hat Issues Fix) PHP Heap Overflows and Other Bugs Let Users Execute Arbitrary Code or Cause Denial of Service Conditions

SecurityTracker Alert ID: 1016986

SecurityTracker URL: http://securitytracker.com/id?1016986

CVE Reference: CVE-2006-4812 (Links to External Site)

Date: Oct 5 2006

Impact: Denial of service via local system, Denial of service via network, Execution of arbitrary code via local system, Execution of arbitrary code via network, User access via local system, User access via network

Fix Available: Yes Vendor Confirmed: Yes

Advisory: Red Hat Advisory

Version(s): 5.x prior to 5.1.5

Description: Several vulnerabilities were reported in PHP. A user may be able to execute arbitrary code on the target system. A user may be able to cause denial of service conditions.

In August 2006, the vendor reported several flaws in PHP that may allow a user or a remote user to execute arbitrary code on the target system.

A buffer overflow exists in the PHP sscanf() function [CVE-2006-4020]. A script that supplies specially crafted arguments to the sscanf() function to execute arbitrary code.

An integer overflow exists in the PHP wordwrap() and str_repeat() functions [CVE-2006-4482]. A script running on a 64-bit server can supply specially crafted data to either function to trigger a heap overflow and execute arbitrary code.

The 'ext/curl/interface.c' and 'ext/curl/streams.c' cURL extension files allow scripts to bypass certain safe_mode or open_basedir access restrictions [CVE-2006-4483]. This can be exploited via the CURLOPT_FOLLOWLOCATION option.

A buffer overflow exists in the PHP gd extension [CVE-2006-4484]. A user can supply a specially crafted GIF image to trigger a heap overflow and execute arbitrary code.

A buffer overread exists in the PHP stripos() function [CVE-2006-4485]. A script can supply specially crafted data to the stripos() function to cause PHP to read past the end of a buffer, which may cause denial of service conditions.

An integer overflow exists in the PHP memory allocation handling on 64-bit systems [CVE-2006-4486]. A script may be able to exceed the 'memory_limit' and cause denial of service conditions.

An integer overflow exists in the PHP memory handling routines [CVE-2006-4812]. A script may be able to execute arbitrary code.

Impact: A user can execute arbitrary code on the target system.

A user can cause denial of service conditions on the target system.

Vendor URL: php.net/releases/5_1_5.php (Links to External Site)

Cause: Access control error, Boundary error, State error

Underlying OS: Linux (Red Hat Enterprise)

Underlying OS Comments: 2.1

Reported By: bugzilla@redhat.com

Message History: This archive entry is a follow-up to the message listed below.

Oct 5 2006

PHP Heap Overflows and Other Bugs Let Users Execute Arbitrary Code or Cause Denial of Service Conditions

Source Message Contents

Date: Thu, 5 Oct 2006 07:42:09 -0400
From: bugzilla@redhat.com
Subject: [RHSA-2006:0708-01] Important: php security update

 

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

- ---------------------------------------------------------------------
                   Red Hat Security Advisory

Synopsis:          Important: php security update
Advisory ID:       RHSA-2006:0708-01
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2006-0708.html
Issue date:        2006-10-05
Updated on:        2006-10-05
Product:           Red Hat Enterprise Linux
CVE Names:         CVE-2006-4812 
- ---------------------------------------------------------------------

1. Summary:

Updated PHP packages that fix an integer overflow flaw are now available
for Red Hat Enterprise Linux 2.1.

This update has been rated as having important security impact by the Red
Hat Security Response Team.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1 - i386, ia64
Red Hat Linux Advanced Workstation 2.1 - ia64
Red Hat Enterprise Linux ES version 2.1 - i386
Red Hat Enterprise Linux WS version 2.1 - i386

3. Problem description:

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

An integer overflow was discovered in the PHP memory handling routines. If
a script can cause memory allocation based on untrusted user data, a remote
attacker sending a carefully crafted request could execute arbitrary code
as the 'apache' user. (CVE-2006-4812) 

This issue did not affect the PHP packages distributed with Red Hat
Enterprise Linux 3 or 4.

Users of PHP should upgrade to these updated packages which contain a
backported patch that corrects this issue.

4. Solution:

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

This update is available via Red Hat Network.  To use Red Hat Network,
launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

5. Bug IDs fixed (http://bugzilla.redhat.com/):

209409 - CVE-2006-4812 PHP ecalloc integer overflow

6. RPMs required:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1AS/en/os/SRPMS/php-4.1.2-2.12.src.rpm
459589d5004f76ab2450edc1af97afe2  php-4.1.2-2.12.src.rpm

i386:
bf655ff9f669af575244594e62da10b9  php-4.1.2-2.12.i386.rpm
ccf83cbe8f88c1bdc4c14c00edea6f71  php-devel-4.1.2-2.12.i386.rpm
4dc1627f9a1082dd7be2d0f8a148b965  php-imap-4.1.2-2.12.i386.rpm
ab066de5a979e6b577acb9626ed69954  php-ldap-4.1.2-2.12.i386.rpm
100b84552bb308afd23b41be156d1b7c  php-manual-4.1.2-2.12.i386.rpm
fdedce80cbf2ae5d19fc5d1ad7135b67  php-mysql-4.1.2-2.12.i386.rpm
ae87153c1f381e5fbde82c14b5ecddfa  php-odbc-4.1.2-2.12.i386.rpm
3903c79f5c7633672b633a8193c5c2a2  php-pgsql-4.1.2-2.12.i386.rpm

ia64:
0bfe9a34fad44475d32eccc82dda8050  php-4.1.2-2.12.ia64.rpm
4ac7c6d5bd7f45eeaa30e2f63e6c1839  php-devel-4.1.2-2.12.ia64.rpm
b866b8555e4f21e9b1b836ba8e07e9d1  php-imap-4.1.2-2.12.ia64.rpm
9b0cb4d86d657865443c20994aa47e6f  php-ldap-4.1.2-2.12.ia64.rpm
f508886a3231941d45d5f070fcea9f13  php-manual-4.1.2-2.12.ia64.rpm
5b1504999d1a4e4298a6b368a6d203b3  php-mysql-4.1.2-2.12.ia64.rpm
e95888b7d47c9716686388869a88ed05  php-odbc-4.1.2-2.12.ia64.rpm
b93c2709f50d773057276a81e102febc  php-pgsql-4.1.2-2.12.ia64.rpm

Red Hat Linux Advanced Workstation 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1AW/en/os/SRPMS/php-4.1.2-2.12.src.rpm
459589d5004f76ab2450edc1af97afe2  php-4.1.2-2.12.src.rpm

ia64:
0bfe9a34fad44475d32eccc82dda8050  php-4.1.2-2.12.ia64.rpm
4ac7c6d5bd7f45eeaa30e2f63e6c1839  php-devel-4.1.2-2.12.ia64.rpm
b866b8555e4f21e9b1b836ba8e07e9d1  php-imap-4.1.2-2.12.ia64.rpm
9b0cb4d86d657865443c20994aa47e6f  php-ldap-4.1.2-2.12.ia64.rpm
f508886a3231941d45d5f070fcea9f13  php-manual-4.1.2-2.12.ia64.rpm
5b1504999d1a4e4298a6b368a6d203b3  php-mysql-4.1.2-2.12.ia64.rpm
e95888b7d47c9716686388869a88ed05  php-odbc-4.1.2-2.12.ia64.rpm
b93c2709f50d773057276a81e102febc  php-pgsql-4.1.2-2.12.ia64.rpm

Red Hat Enterprise Linux ES version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1ES/en/os/SRPMS/php-4.1.2-2.12.src.rpm
459589d5004f76ab2450edc1af97afe2  php-4.1.2-2.12.src.rpm

i386:
bf655ff9f669af575244594e62da10b9  php-4.1.2-2.12.i386.rpm
ccf83cbe8f88c1bdc4c14c00edea6f71  php-devel-4.1.2-2.12.i386.rpm
4dc1627f9a1082dd7be2d0f8a148b965  php-imap-4.1.2-2.12.i386.rpm
ab066de5a979e6b577acb9626ed69954  php-ldap-4.1.2-2.12.i386.rpm
100b84552bb308afd23b41be156d1b7c  php-manual-4.1.2-2.12.i386.rpm
fdedce80cbf2ae5d19fc5d1ad7135b67  php-mysql-4.1.2-2.12.i386.rpm
ae87153c1f381e5fbde82c14b5ecddfa  php-odbc-4.1.2-2.12.i386.rpm
3903c79f5c7633672b633a8193c5c2a2  php-pgsql-4.1.2-2.12.i386.rpm

Red Hat Enterprise Linux WS version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1WS/en/os/SRPMS/php-4.1.2-2.12.src.rpm
459589d5004f76ab2450edc1af97afe2  php-4.1.2-2.12.src.rpm

i386:
bf655ff9f669af575244594e62da10b9  php-4.1.2-2.12.i386.rpm
ccf83cbe8f88c1bdc4c14c00edea6f71  php-devel-4.1.2-2.12.i386.rpm
4dc1627f9a1082dd7be2d0f8a148b965  php-imap-4.1.2-2.12.i386.rpm
ab066de5a979e6b577acb9626ed69954  php-ldap-4.1.2-2.12.i386.rpm
100b84552bb308afd23b41be156d1b7c  php-manual-4.1.2-2.12.i386.rpm
fdedce80cbf2ae5d19fc5d1ad7135b67  php-mysql-4.1.2-2.12.i386.rpm
ae87153c1f381e5fbde82c14b5ecddfa  php-odbc-4.1.2-2.12.i386.rpm
3903c79f5c7633672b633a8193c5c2a2  php-pgsql-4.1.2-2.12.i386.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://www.redhat.com/security/team/key/#package

7. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4812
http://www.redhat.com/security/updates/classification/#important

8. Contact:

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

Copyright 2006 Red Hat, Inc.
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