Why /usr/lib/mysql/plugin/ ? This is the default UDF directory. If writable, the attack is trivial. If not, the attacker looks for world-writable directories like /tmp or /var/tmp and hopes the MySQL daemon’s library path includes them (rare, but possible in misconfigurations). With the .so file on disk, the attacker loads the UDF:
SELECT @@secure_file_priv; Prior to MySQL 5.5, secure_file_priv was often empty, allowing file writes anywhere the mysql user had access. The attacker cannot upload binary files via standard SQL INSERT easily, but they can use INTO DUMPFILE . Exploit code (e.g., raptor_udf2.c or lib_mysqludf_sys.so ) is hex-encoded and written to disk.
SELECT @@version; If the return is 5.0.12 or 5.0.12-community , the system is vulnerable.
-- Execute a command, return the exit code SELECT sys_exec('id > /tmp/owned.txt'); -- Return the output of a command as a string SELECT sys_eval('whoami');
Mysql 5.0.12 Exploit < 95% Plus >
Why /usr/lib/mysql/plugin/ ? This is the default UDF directory. If writable, the attack is trivial. If not, the attacker looks for world-writable directories like /tmp or /var/tmp and hopes the MySQL daemon’s library path includes them (rare, but possible in misconfigurations). With the .so file on disk, the attacker loads the UDF:
SELECT @@secure_file_priv; Prior to MySQL 5.5, secure_file_priv was often empty, allowing file writes anywhere the mysql user had access. The attacker cannot upload binary files via standard SQL INSERT easily, but they can use INTO DUMPFILE . Exploit code (e.g., raptor_udf2.c or lib_mysqludf_sys.so ) is hex-encoded and written to disk. mysql 5.0.12 exploit
SELECT @@version; If the return is 5.0.12 or 5.0.12-community , the system is vulnerable. Why /usr/lib/mysql/plugin/
-- Execute a command, return the exit code SELECT sys_exec('id > /tmp/owned.txt'); -- Return the output of a command as a string SELECT sys_eval('whoami'); If not, the attacker looks for world-writable directories