PHP GENERATE_SEED() weak security
| php-generateseed-weak-security (42226) |  Low Risk |
Description:
PHP, when running on 64-bit systems, could provide weaker than expected security. A multiplication process by the GENERATE_SEED macro function creates zero bit portions and makes attacks easier on protection mechanisms that use the rand and mt_rand functions. A remote attacker could exploit this vulnerability to generate predictable random numbers 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 4.0.0
- PHP, PHP 4.4.7
- PHP, PHP 5.0.0 Beta4
- PHP, PHP 5.0.0
- PHP, PHP 5.0.0 Beta3
- 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 5.0.1
- 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:
Other
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)
- CVE-2008-2108: The GENERATE_SEED macro in PHP 4.x before 4.4.8 and 5.x before 5.2.5, when running on 64-bit systems, performs a multiplication that generates a portion of zero bits during conversion due to insufficient precision, which produces 24 bits of entropy and simplifies brute force attacks against protection mechanisms that use the rand and mt_rand functions.
- 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
Reported:
May 06, 2008
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