PHP cURL open_basedir restriction bypass

php-openbasedir-restriction-bypass (17900)

Medium Risk

Description:

PHP could allow a remote attacker to bypass the open_basedir restriction and obtain sensitive information. By using PHP CURL functions, a remote attacker could view arbitrary files on the system.

Platforms Affected:

• Canonical, Ubuntu 4.10
• PHP, PHP 4.0
• RedHat, Enterprise Linux 3 AS
• RedHat, Enterprise Linux 3 WS
• RedHat, Enterprise Linux 3 ES
• RedHat, Enterprise Linux 3 Desktop
• RedHat, Enterprise Linux 4 Desktop
• RedHat, Enterprise Linux 4 ES
• RedHat, Enterprise Linux 4 AS
• RedHat, Enterprise Linux 4 WS

Remedy:

For Red Hat Linux:
Refer to RHSA-2005:406-11 or RHSA-2005:405-06 for patch, upgrade, or suggested workaround information. See References.

For Ubuntu Linux:

For other distributions:
Contact your vendor for upgrade or patch information.

Consequences:

Bypass Security

References:

• BugTraq Mailing List, Wed Oct 27 2004 - 11:26:23 CDT , PHP4 cURL functions bypass open_basedir at http://archives.neohapsis.com/archives/bugtraq/2004-10/0309.html.
• CIAC INFORMATION BULLETIN P-197, PHP Security Bugs at http://www.ciac.org/ciac/bulletins/p-197.shtml.
• BID-11557: PHP cURL Open_Basedir Restriction Bypass Vulnerability
• CVE-2004-1392: PHP 4.0 with cURL functions allows remote attackers to bypass the open_basedir setting and read arbitrary files via a file: URL argument to the curl_init function.
• RHSA-2005-405: PHP security update
• RHSA-2005-406: PHP security update
• SECTRACK ID: 1011984: PHP cURL Functions Let Scripts Byass the `open_basedir` Directory Restrictions
• USN-66-1: PHP vulnerabilities
• USN-66-2: PHP vulnerability

Reported:

Oct 27, 2004

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 the author/distributor (IBM Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

For corrections or additions please email xforce@iss.net

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