CVE-2007-2727: Undefined Security Weakness

The mcryptcreateiv 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 phprandr with an uninitialized seed variable and therefore always generates the same initialization vector IV, which might allow context-dependent attackers to decrypt...