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>> PHP "session_regenerate_id()" and "php_session_initialize()" Double Free Vulnerabilities
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Title : PHP "session_regenerate_id()" and "php_session_initialize()" Double Free Vulnerabilities
VUPEN ID : VUPEN/ADV-2007-0960
CVE ID : CVE-2007-1521 - CVE-2007-1522
Rated as : Moderate Risk 
Remotely Exploitable : No
Locally Exploitable : Yes
Release Date : 2007-03-15
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Two vulnerabilities have been identified in PHP, which could be exploited by malicious users to bypass security restrictions and execute arbitrary commands.
The first issue is due to a double free error inthe "session_regenerate_id()" function when generating new session identifiers, which could be exploited by attackers to bypass PHP restrictions and execute arbitrary commands on the underlying operating system via a malicious PHP script.
The second vulnerability is due to a double free error inthe "php_session_initialize()" function when rejecting session identifiers, which could be exploited by attackers to bypass PHP restrictions and execute arbitrary commands on the underlying operating system via a malicious PHP script.
Affected Products
PHP versions 5.x
Solution
The first vulnerability was fixed in version 5.2.2 and 4.4.7.
VUPEN Security is not aware of any vendor-supplied patch.
References
http://www.vupen.com/english/advisories/2007/0960
http://www.php-security.org/MOPB/MOPB-22-2007.html
http://www.php-security.org/MOPB/MOPB-23-2007.html
http://www.php.net/releases/5_2_2.php
http://www.php.net/releases/4_4_7.php
Credits
Vulnerabilities reported by Stefan Esser
ChangeLog
2007-03-15 : Initial release
2007-05-02 : Updated Solution
Vulnerability Management
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