Here's a breakdown of the exploit:
While 5.0.12 was also susceptible to various "Denial of Service" (DoS) attacks through malformed packets, it is often discussed alongside the broader "MySQL Authentication Bypass" flaw (though the most famous version of that bug, CVE-2012-2122, occurred much later). In the 5.0.x era, the focus was largely on leading to administrative takeovers. Because 5.0.12 lacked the robust memory protection and sandboxing found in modern versions (like 8.0), a successful exploit typically involved:
The vulnerable code in MySQL 5.0.12 is as follows:
Once the library is on disk, you must "register" the new function within MySQL to use it.
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At 04:58 UTC, he closed the last connection.
