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CLZero - A Project For Fuzzing HTTP/1.1 CL.0 Request Smuggling Attack Vectors

By: Zion3R


A project for fuzzing HTTP/1.1 CL.0 Request Smuggling Attack Vectors.

About

Thank you to @albinowax, @defparam and @d3d else this tool would not exist. Inspired by the tool Smuggler all attack gadgets adapted from Smuggler and https://portswigger.net/research/how-to-turn-security-research-into-profit

For more info see: https://moopinger.github.io/blog/fuzzing/clzero/tools/request/smuggling/2023/11/15/Fuzzing-With-CLZero.html


Usage

usage: clzero.py [-h] [-url URL] [-file FILE] [-index INDEX] [-verbose] [-no-color] [-resume] [-skipread] [-quiet] [-lb] [-config CONFIG] [-method METHOD]

CLZero by Moopinger

optional arguments:
-h, --help show this help message and exit
-url URL (-u), Single target URL.
-file FILE (-f), Files containing multiple targets.
-index INDEX (-i), Index start point when using a file list. Default is first line.
-verbose (-v), Enable verbose output.
-no-color Disable colors in HTTP Status
-resume Resume scan from last index place.
-skipread Skip the read response on smuggle requests, recommended. This will save a lot of time between requests. Ideal for targets with standard HTTP traffic.
-quiet (-q), Disable output. Only successful payloads will be written to ./payloads/
-lb Last byte sync method for least request latency. Due to th e nature of the request, it cannot guarantee that the smuggle request will be processed first. Ideal for targets with a high
amount of traffic, and you do not mind sending multiple requests.
-config CONFIG (-c) Config file to load, see ./configs/ to create custom payloads
-method METHOD (-m) Method to use when sending the smuggle request. Default: POST

single target attack:

  • python3 clzero.py -u https://www.target.com/ -c configs/default.py -skipread

  • python3 clzero.py -u https://www.target.com/ -c configs/default.py -lb

Multi target attack:

  • python3 clzero.py -l urls.txt -c configs/default.py -skipread

  • python3 clzero.py -l urls.txt -c configs/default.py -lb

Install

git clone https://github.com/Moopinger/CLZero.git
cd CLZero
pip3 install -r requirements.txt


CISA Adds 7 New Actively Exploited Vulnerabilities to Catalog

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Thursday moved to add aΒ critical SAP security flawΒ to itsΒ Known Exploited Vulnerabilities Catalog, based on evidence of active exploitation. The issue in question isΒ CVE-2022-22536, which has received the highest possible risk score of 10.0 on the CVSS vulnerability scoring system and was addressed by SAP as part of its Patch
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