Forbidden

Tool to bypass 4xx HTTP response status code. For example bypass 403 forbidden on website. I hope this tool can help you to bypass some Web Application Security while pentesting.

Script uses multithreading, and is based on brute forcing so might have some false positives. Script uses colored output.

Results will be sorted by HTTP response status code ascending, content length descending, and ID ascending.

To filter out false positives, check each content length manually with the provided cURL command. If it does not results in bypass, just ignore all other results with the same content length.

Test	Scope
Various HTTP methods	method
Various HTTP methods with ‘Content-Length: 0’ header	method
Cross-site tracing (XST) with HTTP TRACE and TRACK methods	method
File upload with HTTP PUT method	method
Various HTTP method overrides	method-override
Various HTTP headers	header
Various URL overrides	header
URL override with two ‘Host’ headers	header
Various URL path bypasses	path
Various URL scheme overrides	scheme-override
Basic authentication/authorization including null session	auth
Broken URL parsers	parser

Tested on Kali Linux v2021.4 (64-bit).

Installation and Run

Open your preferred console from /src/ and run the commands shown below.

Install required tools:

apt-get install -y curl

Install required packages:

pip3 install -r requirements.txt

Run the script:

python3 forbidden.py

Be aware of rate limiting. Give it some time before you run the script again for the same domain in order to get better results.

Some websites require a user agent header. Download a user agent list from here.

Automation

Bypass 403 Forbidden HTTP response status code:

count=0; for subdomain in $(cat subdomains_403.txt); do count=$((count+1)); echo “#${count} | ${subdomain}”; python3 forbidden.py -u “${subdomain}” -t method,method-override,header,path,scheme-override -f GET -o “forbidden_403_results_${count}.json”; done

Bypass 401 Unauthorized HTTP response status code:

count=0; for subdomain in $(cat subdomains_401.txt); do count=$((count+1)); echo “#${count} | ${subdomain}”; python3 forbidden.py -u “${subdomain}” -t auth -f GET -o “forbidden_401_results_${count}.json”; done

Broken URL parser check:

count=0; for subdomain in $(cat subdomains_live_long.txt); do count=$((count+1)); echo “#${count} | ${subdomain}”; python3 forbidden.py -u “${subdomain}” -t parser -f GET -o “forbidden_parser_results_${count}.json”; done

This tool is made for educational purposes. I hope it will help!

Download Forbidden