Add new tamper script 'mysqlversioncomment.py' #5923
+99
−0
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Replaces common SQL keywords with MySQL versioned comments (e.g., 'SELECT' becomes '/*!50000SELECT*/').
tanaydin
reviewed
Jul 14, 2025
tamper/mysqlversioncomment.py
Outdated
| sorted_keywords = sorted(keywords.keys(), key=len, reverse=True) | ||
|
|
||
| for keyword in sorted_keywords: | ||
| if "()" in keyword: |
There was a problem hiding this comment.
can simplify like
ret_val = re.sub(r"(?i)\b%s\b" % re.escape(keyword), keywords[keyword], ret_val)
you are always escaping, or add escaped strings for substitution which is faster
There was a problem hiding this comment.
please check my merge request
tanaydin
reviewed
Jul 14, 2025
tamper/mysqlversioncomment.py
Outdated
| ret_val = payload | ||
|
|
||
| if payload: | ||
| sorted_keywords = sorted(keywords.keys(), key=len, reverse=True) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Description
This pull request introduces a new tamper script,
mysqlversioncomment.py, designed to obfuscate SQL injection payloads targeting MySQL databases. The script wraps a comprehensive list of common SQL keywords, functions, and information schema objects within MySQL-specific versioned comments (e.g.,/*!50000KEYWORD*/).This obfuscation technique is effective at bypassing basic Web Application Firewalls (WAFs) and Intrusion Detection Systems (IDS) that perform simple keyword filtering without correctly parsing MySQL's versioned comment syntax.
How it Works
The script iterates through a predefined list of keywords and functions. To ensure correctness, it replaces longer keywords first (e.g.,
GROUP BYbeforeBY) and uses word boundaries to prevent accidental replacement of substrings within other words.Example of transformation:
Before:
After:
This addition provides another valuable tool for penetration testers to use when faced with filtered environments.