PHP Python Extension 'safe_mode' Restriction Bypass Vulnerability

BID:32902

Info

PHP Python Extension 'safe_mode' Restriction Bypass Vulnerability

Bugtraq ID: 32902
Class: Design Error
CVE:
Remote: No
Local: Yes
Published: Dec 17 2008 12:00AM
Updated: Dec 29 2008 05:42PM
Credit: Amir Salmani
Vulnerable: PHP PHP 5.2.8
PHP PHP 5.2.7
PHP PHP 5.2.6
PHP PHP 5.2.5
PHP PHP 5.2.4
PHP PHP 5.2.3
PHP PHP 5.2.2
PHP PHP 5.2.1
+ Ubuntu Ubuntu Linux 7.04 sparc
+ Ubuntu Ubuntu Linux 7.04 powerpc
+ Ubuntu Ubuntu Linux 7.04 i386
+ Ubuntu Ubuntu Linux 7.04 amd64
PHP PHP 5.2
+ Debian Linux 4.0 sparc
+ Debian Linux 4.0 s/390
+ Debian Linux 4.0 powerpc
+ Debian Linux 4.0 mipsel
+ Debian Linux 4.0 mips
+ Debian Linux 4.0 m68k
+ Debian Linux 4.0 ia-64
+ Debian Linux 4.0 ia-32
+ Debian Linux 4.0 hppa
+ Debian Linux 4.0 arm
+ Debian Linux 4.0 amd64
+ Debian Linux 4.0 alpha
+ Debian Linux 4.0
Not Vulnerable: PHP PHP 6.0

Discussion

PHP Python Extension 'safe_mode' Restriction Bypass Vulnerability

PHP is prone to a 'safe_mode' restriction-bypass vulnerability when the Python extension in enabled. Successful exploits could allow an attacker to execute arbitrary code.

This vulnerability would be an issue in shared-hosting configurations where multiple users can create and execute arbitrary PHP script code; in such cases, the 'safe_mode' restriction is expected to isolate users from each other.

Versions prior to PHP 6 are vulnerable.

NOTE: The severity of this issue can vary depending on the specific configuration of the server.

Exploit / POC

PHP Python Extension 'safe_mode' Restriction Bypass Vulnerability

Attackers may exploit these issues with standard PHP code.

The following exploit code is available:

Solution / Fix

PHP Python Extension 'safe_mode' Restriction Bypass Vulnerability

Solution:
Currently we are not aware of any vendor-supplied patches. If you feel we are in error or if you are aware of more recent information, please mail us at: [email protected].

References

PHP Python Extension 'safe_mode' Restriction Bypass Vulnerability

References:

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