PHP 5.2.0 and 4.4 allows local users to bypass safe_mode...

Vulnerability Description

PHP 5.2.0 and 4.4 allows local users to bypass safe_mode and open_basedir restrictions via a malicious path and a null byte before a ";" in a session_save_path argument, followed by an allowed path, which causes a parsing inconsistency in which PHP validates the allowed path but sets session.save_path to the malicious path.

References

• http://secunia.com/advisories/24022
• http://www.openpkg.com/security/advisories/OpenPKG-SA-2007.010.html
• http://www.securityfocus.com/archive/1/453938/30/9270/threaded
• http://secunia.com/advisories/24514
• http://securityreason.com/securityalert/2000
• http://cvs.php.net/viewcvs.cgi/php-src/ext/session/session.c?r1=1.336.2.53.2.7&r2=1.336.2.53.2.8
• http://www.mandriva.com/security/advisories?name=MDKSA-2007:038
• http://securityreason.com/achievement_securityalert/43
• http://lists.suse.com/archive/suse-security-announce/2007-Mar/0003.html
• http://www.securityfocus.com/bid/21508