PHP escapeshellcmd function security bypass
| php-escapeshellcmd-security-bypass (42138) |  Low Risk |
Description:
PHP could allow a remote attacker to bypass security restrictions, caused by an error in the PHP escapeshellcmd function when a locale containing a variable width character set is used. An attacker could exploit this vulnerability via a backslash to inject arbitrary commands and possibly launch further attacks against the system.
*CVSS:
| Base Score: | 4.3 |
| Access Vector: | Network |
| Access Complexity: | Medium |
| Authentication: | None |
| Confidentiality Impact: | None |
| Integrity Impact: | Partial |
| Availability Impact: | None |
| Temporal Score: | 3.2 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Bypass Security
Remedy:
Upgrade to the latest version of PHP (5.2.6 or later), available from the PHP Web site. See References.
For other distributions:
Apply the appropriate upgrade for your system. See References.
References:
- Apple Web site: About Security Update 2008-005.
- BugTraq Mailing List, Tue May 06 2008 - 03:18:25 CDT: Advisory SE-2008-03: PHP Multibyte Shell Command Escaping Bypass Vulnerability.
- PHP Web site: PHP: Downloads.
- PHP5 ChangeLog: Version 5.2.6.
- 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)
- BID-29009: PHP 5.2.5 and Prior Versions Multiple Vulnerabilities
- CVE-2008-2051: The escapeshellcmd API function in PHP before 5.2.6 has unknown impact and context-dependent attack vectors related to incomplete multibyte chars.
- DSA-1572: php5 -- several vulnerabilities
- DSA-1578: php4 -- several vulnerabilities
- GLSA-200811-05: PHP: Multiple vulnerabilities
- 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
- 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
- SA30048: PHP Multiple Vulnerabilities
- SA31326: Apple Mac OS X Security Update Fixes Multiple Vulnerabilities
- SUSE-SR:2008:014: [security-announce] SUSE Security Summary Report SUSE-SR:2008:014
Platforms Affected:
- Apple Mac OS X 10.5.4
- Apple Mac OS X Server 10.5.4
- Canonical Ubuntu 6.06 LTS
- Canonical Ubuntu 7.04
- Canonical Ubuntu 7.10
- Canonical Ubuntu 8.04 LTS
- Debian Debian Linux 4.0
- Gentoo Linux
- 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 X86_64
- MandrakeSoft Mandrake Linux 2008.1
- MandrakeSoft Mandrake Linux Corporate Server 4.0
- MandrakeSoft Mandrake Linux Corporate Server 4.0 X86_64
- 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 5.0.1
- 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
- PHP PHP 5.2.5
- 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 AS
- RedHat Enterprise Linux 4 ES
- RedHat Enterprise Linux 4 WS
- RedHat Enterprise Linux 4 Desktop
- RedHat Enterprise Linux 5
- RedHat Enterprise Linux 5 Client Workstation
- RedHat Linux Advanced Workstation 2.1 Itanium
- RedHat RHEL Application Stack 2
- Turbolinux Appliance Server 3.0
- Turbolinux Appliance Server 3.0 x64
- Turbolinux Client 2008
- Turbolinux Turbolinux 10 Server
- Turbolinux Turbolinux 10 Server x64 Ed
- Turbolinux Turbolinux 11 Server
- Turbolinux Turbolinux 11 Server x64 Ed
- Turbolinux Turbolinux FUJI
- 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
Reported:
May 01, 2008
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For corrections or additions please email xforce@iss.net
* According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
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.