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.
*CVSS:
| Base Score: | 3.5 |
| Access Vector: | Remote |
| Access Complexity: | Low |
| Authentication: | Not Required |
| Confidentiality Impact: | Partial |
| Integrity Impact: | None |
| Availability Impact: | None |
| Temporal Score: | 2.7 |
| Exploitability: | Proof-Of-Concept |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Bypass Security
Remedy:
Upgrade to the latest version of PHP (4.4.3 or later), available from the The PHP Group Web site. See References.
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.
- The PHP Group Web site: PHP 4.4.3. Release Announcement.
- 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
Platforms Affected:
- Canonical Ubuntu 5.04
- Canonical Ubuntu 5.10
- Canonical Ubuntu 6.06 LTS
- MandrakeSoft Mandrake Linux 2006 X86_64
- MandrakeSoft Mandrake Linux 2006
- MandrakeSoft Mandrake Linux LE2005
- MandrakeSoft Mandrake Linux LE2005 X86_64
- 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 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 Beta 4 Patch1
- PHP PHP 4.0 Beta1
- 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 Beta4
- PHP PHP 5.0.0 RC1
- PHP PHP 5.0.0 RC2
- PHP PHP 5.0.0 Beta2
- PHP PHP 5.0.0 Beta1
- PHP PHP 5.0.0
- PHP PHP 5.0.0 Beta3
- PHP PHP 5.0.0 RC3
- 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
Reported:
Jun 25, 2006
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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 IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.