在以root运行的MySQL/MariaDB环境中使用raptor_udf2 exploit进行PrivacyEscalation时执行CREATE FUNCTION语句遇阻的技术求助

First, Let’s Break Down the Core Logic of raptor_udf2 #

raptor_udf2 works by exploiting MySQL User-Defined Functions (UDFs) to escalate privileges. Here’s the plain-language breakdown:

• UDFs let MySQL call functions from external shared libraries (like .so files on Linux).
• If you can upload the malicious raptor_udf2.so library to a directory MySQL can access, then create a UDF that maps to a function in this library, you can execute system-level commands directly through MySQL.
• Even though you have MySQL root access, that’s separate from system root privileges—this tool bridges that gap to get full system control, which is what your "PrivacyEscalation" (more accurately, privilege escalation) is targeting.

Common Reasons Your CREATE FUNCTION Statement Fails #

Let’s go through the most likely issues step by step:

• Incorrect library file location: MySQL loads UDFs from specific directories. Run show variables like 'plugin_dir'; to get the official plugin path—you must upload raptor_udf2.so to this exact directory. If you put it elsewhere, MySQL won’t find it.
• Wrong file permissions: The MySQL process needs read access to the .so file. Set permissions to chmod 755 raptor_udf2.so to ensure the mysql user can read it.
• Architecture mismatch: If you’re using a 32-bit raptor_udf2.so on a 64-bit system (or vice versa), or if the library isn’t compiled to match your MySQL’s architecture, it’ll fail to load. Double-check that the library matches your target system’s OS and MySQL build.
• Restrictive MySQL configurations:
  • The secure_file_priv variable might block writing files to the plugin directory. Run show variables like '%secure_file_priv'; to check—if it’s set to a specific path, you can only write files there, which might not be the plugin directory.
  • Some configurations disable UDF loading entirely. Look for settings like plugin_load_add or check if your MySQL version has built-in restrictions on UDFs.
• Mismatched function name: Verify that the raptor_udf2.so library actually contains a function named do_system. Some variants of this exploit use different function names like sys_exec or sys_eval—you’ll need to match the exact function name in your CREATE FUNCTION statement.

Recommended Tags for Your Question #

Since your platform doesn’t have dedicated pentesting or privacy-escalation tags, use these alternatives to categorize your issue:

• mysql (core database context)
• mariadb (if targeting MariaDB specifically)
• privilege-escalation (if available; if not, use security + system-administration)
• exploit-development (covers use of vulnerability exploitation tools)

内容的提问来源于stack exchange，提问作者Christian Kammerer