PHP substr_compare() "length" parameter denial of service
| php-substrcompare-length-dos (26003) |  Low Risk |
Description:
PHP is vulnerable to a denial of service caused by an input validation error in the substr_compare() function. If a remote attacker passes an overly large 'length' argument to the substr_compare() function via a PHP script that calls the zend_binary_strcmp() and zend_binary_strcasecmp() functions, the attacker could cause a memory access violation error to occur, resulting in a denial of service.
Platforms Affected:
- Canonical, Ubuntu 5.04
- Canonical, Ubuntu 5.10
- Canonical, Ubuntu 6.06 LTS
- Gentoo, Linux
- MandrakeSoft, Mandrake Linux 2006 X86_64
- MandrakeSoft, Mandrake Linux 2006
- MandrakeSoft, Mandrake Linux LE2005 X86_64
- MandrakeSoft, Mandrake Linux LE2005
- MandrakeSoft, Mandrake Linux Corporate Server 3.0 X86_64
- MandrakeSoft, Mandrake Linux Corporate Server 3.0
- MandrakeSoft, Mandrake Multi Network Firewall 2.0
- Novell, UnitedLinux 1.0
- OpenPKG, OpenPKG CURRENT
- OpenPKG, OpenPKG Enterprise E1.0-SOLID
- PHP, PHP 4.0 RC2
- PHP, PHP 4.0 RC1
- PHP, PHP 4.0 Beta4
- PHP, PHP 4.0 Beta3
- PHP, PHP 4.0 Beta2
- PHP, PHP 4.0 Beta1
- PHP, PHP 4.0 Beta 4 Patch1
- PHP, PHP 4.0.0
- PHP, PHP 4.0.1
- PHP, PHP 4.0.2
- PHP, PHP 4.0.3
- PHP, PHP 4.0.4
- PHP, PHP 4.0.5
- PHP, PHP 4.0.6
- PHP, PHP 4.0.7
- PHP, PHP 4.1.0
- PHP, PHP 4.1.1
- PHP, PHP 4.1.2
- PHP, PHP 4.1.3
- PHP, PHP 4.2.0
- PHP, PHP 4.2.1
- PHP, PHP 4.2.2
- PHP, PHP 4.2.3
- PHP, PHP 4.2.4
- PHP, PHP 4.3.0
- PHP, PHP 4.3.1
- PHP, PHP 4.3.10
- PHP, PHP 4.3.11
- PHP, PHP 4.3.2
- PHP, PHP 4.3.3
- PHP, PHP 4.3.4
- PHP, PHP 4.3.5
- PHP, PHP 4.3.6
- PHP, PHP 4.3.7
- PHP, PHP 4.3.8
- PHP, PHP 4.3.9
- PHP, PHP 4.4.0
- PHP, PHP 4.4.1
- PHP, PHP 4.4.2
- PHP, PHP 5.0.0 RC3
- PHP, PHP 5.0.0 RC2
- PHP, PHP 5.0.0 RC1
- PHP, PHP 5.0.0 Beta4
- PHP, PHP 5.0.0 Beta3
- PHP, PHP 5.0.0 Beta2
- PHP, PHP 5.0.0 Beta1
- 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
- SuSE, SuSE SLES 9
Remedy:
Upgrade to the latest version of PHP (5.1.3 or later), available from The PHP Group Web site. See References.
For Gentoo Linux:
Refer to Gentoo Linux Security Announcement GLSA 2006-05-08 for patch, upgrade, or suggested workaround information. See References.
Consequences:
Denial of Service
References:
- INFIGO IS Security Advisory #ADV-2006-04-02, Multiple PHP4/PHP5 vulnerabilities at http://www.infigo.hr/en/in_focus/advisories/INFIGO-2006-04-02.
- The PHP Group Web site, PHP: Hypertext Preprocessor at http://www.php.net/.
- The PHP Group Web site, PHP 5.1.3. Release Announcement at http://www.php.net/release_5_1_3.php.
- CVE-2006-1991: The substr_compare function in string.c in PHP 5.1.2 allows context-dependent attackers to cause a denial of service (memory access violation) via an out-of-bounds offset argument.
- GLSA-200605-08: PHP: Multiple vulnerabilities
- MDKSA-2006:091: Updated php packages fix vulnerabilities
- OpenPKG-SA-2007.019: php
- SECTRACK ID: 1015979: PHP wordwrap(), array_fill(), and substr_compare() Bugs Let Remote Users Deny Service or Execute Arbitrary Code
- SUSE-SA:2006:031: php4php5 security problems
- USN-320-1: PHP vulnerabilities
- USN-320-2: PHP regression
- VUPEN/ADV-2006-1500: PHP Multiple Function Buffer Overflow and Denial of Service Vulnerabilities
Reported:
Apr 24, 2006
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