PHP error_log() safe mode bypass
| php-errorlog-safe-mode-bypass (27414) |  Medium Risk |
Description:
PHP could allow a remote attacker to bypass safe mode restrictions, caused by improper validation of user-supplied input by the error_log() function. A remote attacker could exploit this vulnerability using a php:// request containing directory traversal sequences (../) as a destination argument to bypass security restrictions and gain unauthorized access to arbitrary files on Web servers that are running an affected version of PHP.
Platforms Affected:
- Canonical, Ubuntu 5.04
- Canonical, Ubuntu 5.10
- Canonical, Ubuntu 6.06 LTS
- MandrakeSoft, Mandrake Linux 2006
- MandrakeSoft, Mandrake Linux 2006 X86_64
- 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
- PHP, PHP 4.0 RC1
- PHP, PHP 4.0 RC2
- 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
- PHP, PHP 5.1.3
- PHP, PHP 5.1.4
Remedy:
Upgrade to the latest version of PHP (4.4.3 or later), available from the The PHP Group Web site. See References.
Consequences:
Bypass Security
References:
- Full-Disclosure Mailing List, Sun Jun 25 2006 - 18:10:48 CDT , error_log() Safe Mode Bypass PHP 5.1.4 and 4.4.2 at http://archives.neohapsis.com/archives/fulldisclosure/2006-06/0680.html.
- The PHP Group Web site, PHP 4.4.3. Release Announcement at http://www.php.net/release_4_4_3.php.
- BID-18645: PHP Error_Log Safe_Mode Restriction-Bypass Vulnerability
- CVE-2006-3011: The error_log function in basic_functions.c in PHP before 4.4.4 and 5.x before 5.1.5 allows local users to bypass safe mode and open_basedir restrictions via a php:// or other scheme in the third argument, which disables safe mode.
- MDKSA-2006:122: Updated php packages fix multiple vulnerabilities
- OSVDB ID: 26827: PHP error_log() Third Argument Safe Mode Bypass
- SA20818: PHP "error_log()" Safe Mode Bypass Weakness
- SA21546: PHP Multiple Vulnerabilities
- SECTRACK ID: 1016377: PHP error_log() Function Lets Users Bypass Safe Mode File Access Restrictions
- USN-320-1: PHP vulnerabilities
- USN-320-2: PHP regression
- VUPEN/ADV-2006-2523: PHP error_log() Destination Parameter Handling Safe Mode Bypass Vulnerability
Reported:
Jun 25, 2006
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