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This vulnerability has been modified since it was last analyzed by the NVD. It is awaiting reanalysis which may result in further changes to the information provided.
The mcrypt_create_iv function in ext/mcrypt/mcrypt.c in PHP before 4.4.7, 5.2.1, and possibly 5.0.x and other PHP 5 versions, calls php_rand_r with an uninitialized seed variable and therefore always generates the same initialization vector (IV), which might allow context-dependent attackers to decrypt certain data more easily because of the guessable encryption keys.
View Analysis Description
Not vulnerable. This issue did not affect the versions of php as shipped with Red Hat Enterprise Linux 2.1, 3, 4, or 5, or Red Hat
Application Stack 1, or 2, as the packages shipped are not compiled with the mcrypt extension affected by this issue.
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