The GENERATE_SEED macro in PHP 4.x before 4.4.8 and 5.x before 5.2.5,
when running on 64-bit systems, performs a multiplication that
generates a portion of zero bits during conversion due to insufficient
precision, which produces 24 bits of entropy and simplifies brute
force attacks against protection mechanisms that use the rand and
Note:References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
BUGTRAQ:20080506 Advisory SE-2008-02: PHP GENERATE_SEED() Weak Random Number Seed Vulnerability
Disclaimer: The entry creation date may reflect when
the CVE-ID was allocated or reserved, and does not
necessarily indicate when this vulnerability was
discovered, shared with the affected vendor, publicly
disclosed, or updated in CVE.
This is an entry on the CVE
list, which standardizes names for security