PHP GENERATE_SEED security bypass
| php-generateseed-security-bypass (42284) |  Medium Risk |
Description:
PHP, when running on 32-bit systems, could allow a remote attacker to bypass security restrictions. A multiplication process by the GENERATE_SEED macro function uses values which create a zero seed and makes a security bypass easier on the protection mechanism. A remote attacker could exploit this vulnerability to generate predictable random values for the rand and mt_rand functions and gain unauthorized access to the applications.
Platforms Affected:
- Canonical, Ubuntu 6.06 LTS
- Canonical, Ubuntu 7.04
- Canonical, Ubuntu 7.10
- Canonical, Ubuntu 8.04 LTS
- MandrakeSoft, Mandrake Linux 2007.1 X86_64
- MandrakeSoft, Mandrake Linux 2007.1
- MandrakeSoft, Mandrake Linux 2008.0
- MandrakeSoft, Mandrake Linux 2008.0 X86_64
- MandrakeSoft, Mandrake Linux 2008.1
- MandrakeSoft, Mandrake Linux 2008.1 X86_64
- MandrakeSoft, Mandrake Linux Corporate Server 3.0
- MandrakeSoft, Mandrake Linux Corporate Server 3.0 X86_64
- MandrakeSoft, Mandrake Linux Corporate Server 4.0 X86_64
- MandrakeSoft, Mandrake Linux Corporate Server 4.0
- MandrakeSoft, Mandrake Multi Network Firewall 2.0
- PHP, PHP 4.4.7
- PHP, PHP 5.0.0 Beta1
- PHP, PHP 5.0.0 RC1
- PHP, PHP 5.0.0 RC2
- PHP, PHP 5.0.0 RC3
- PHP, PHP 5.0.0 Beta2
- PHP, PHP 5.0.0 Beta3
- PHP, PHP 5.0.0
- PHP, PHP 5.0.1
- PHP, PHP 5.0.2
- PHP, PHP 5.0.3
- PHP, PHP 5.0.4
- PHP, PHP 5.0.5
- PHP, PHP 5.1.0
- PHP, PHP 5.1.1
- PHP, PHP 5.1.2
- PHP, PHP 5.1.3
- PHP, PHP 5.1.4
- PHP, PHP 5.1.5
- PHP, PHP 5.1.6
- PHP, PHP 5.2.0
- PHP, PHP 5.2.1
- PHP, PHP 5.2.2
- PHP, PHP 5.2.3
- PHP, PHP 5.2.4
- RedHat, Application Stack v1 for EL AS 4
- RedHat, Application Stack v1 for EL ES 4
- RedHat, Enterprise Linux 2.1 AS
- RedHat, Enterprise Linux 2.1 ES
- RedHat, Enterprise Linux 2.1 WS
- RedHat, Enterprise Linux 3 WS
- RedHat, Enterprise Linux 3 ES
- RedHat, Enterprise Linux 3 AS
- RedHat, Enterprise Linux 3 Desktop
- RedHat, Enterprise Linux 4 ES
- RedHat, Enterprise Linux 4 WS
- RedHat, Enterprise Linux 4 Desktop
- RedHat, Enterprise Linux 4 AS
- RedHat, Enterprise Linux 5
- RedHat, Enterprise Linux 5 Client Workstation
- RedHat, Linux Advanced Workstation 2.1 Itanium
- RedHat, RHEL Application Stack 2
- Turbolinux, Turbolinux 10 Server
- Turbolinux, Turbolinux 10 Server x64 Ed
- Turbolinux, Turbolinux 11 Server
- Turbolinux, Turbolinux 11 Server x64 Ed
- Turbolinux, Turbolinux Multimedia
- Turbolinux, Turbolinux Personal
- Turbolinux, Turbolinux Appliance Server 1.0 Hosting Ed
- Turbolinux, Turbolinux Appliance Server 1.0 Workgroup Ed
- Turbolinux, Turbolinux Appliance Server 2.0
Remedy:
Upgrade to the latest version of PHP (5.2.6 or later), available from the PHP Web site. See References.
Consequences:
Bypass Security
References:
- Full-Disclosure Mailing List, Tue May 06 2008 - 03:16:01 CDT, Advisory SE-2008-02: PHP GENERATE_SEED() Weak Random Number Seed Vulnerability at http://archives.neohapsis.com/archives/fulldisclosure/2008-05/0103.html.
- PHP Web site, PHP: Downloads at http://www.php.net/downloads.php.
- ASA-2008-313: php security update (RHSA-2008-0544)
- ASA-2008-320: php security and bug fix update (RHSA-2008-0545)
- ASA-2008-325: php security update (RHSA-2008-0546)
- ASA-2008-326: php security update (RHSA-2008-0582)
- CVE-2008-2107: The GENERATE_SEED macro in PHP 4.x before 4.4.8 and 5.x before 5.2.5, when running on 32-bit systems, performs a multiplication using values that can produce a zero seed in rare circumstances, which allows context-dependent attackers to predict subsequent values of the rand and mt_rand functions and possibly bypass protection mechanisms that rely on an unknown initial seed.
- MDVSA-2008:125: Updated PHP packages fix multiple vulnerabilities
- MDVSA-2008:126: Updated PHP packages fix multiple vulnerabilities
- MDVSA-2008:127: Updated PHP packages fix multiple vulnerabilities
- MDVSA-2008:128: Updated PHP packages fix multiple vulnerabilities
- MDVSA-2008:129: Updated PHP packages fix multiple vulnerabilities
- MDVSA-2008:130: Updated PHP packages fix multiple vulnerabilities
- RHSA-2008-0505: Moderate: Red Hat Application Stack v2.1 security and enhancement update
- RHSA-2008-0544: Moderate: php security update
- RHSA-2008-0545: Moderate: php security and bug fix update
- RHSA-2008-0546: Moderate: php security update
- RHSA-2008-0582: Moderate: php security update
- SUSE-SR:2008:014: [security-announce] SUSE Security Summary Report SUSE-SR:2008:014
Reported:
May 06, 2008
The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall the author/distributor (Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.
Copyright (c) 1994-2008 Internet Security Systems, Inc. All rights reserved worldwide.
For corrections or additions please email xforce@iss.net