The zend_restore_ini_entry_cb function in zend_ini.c in PHP 5.3.0, 5.2.10, and earlier versions allows context-specific attackers to obtain sensitive information (memory contents) and cause a PHP crash by using the ini_set function to declare a variable, then using the ini_restore function to restore the variable.
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=540605
http://secunia.com/advisories/37482
http://securityreason.com/achievement_securityalert/65
http://svn.php.net/viewvc/php/php-src/branches/PHP_5_3/Zend/zend_ini.c?r1=272370&r2=284156
Source: MITRE
Published: 2009-12-01
Updated: 2018-10-30
Type: NVD-CWE-Other
Base Score: 6.4
Vector: AV:N/AC:L/Au:N/C:P/I:N/A:P
Impact Score: 4.9
Exploitability Score: 10
Severity: MEDIUM