One-liner Bug Hunting: My Favorite Commands

In this post, I will be sharing some of my favorite one-liner commands that I use for bug hunting. These commands can be used to perform reconnaissance, identify open ports, check for file inclusion vulnerabilities, and much more. I hope you find them useful.

## Find all subdomains and check if they are alive
subfinder -d example.com -all -silent | httpx -ports 80,443,8080,8443,9001,9002,9000 -follow-redirects -status-code -title -content-length

Explanation:

subfinder is a subdomain enumeration tool that can be used to find all subdomains of a given domain. The output of subfinder is piped to httpx, which is a tool to check if the subdomains are alive. The -ports flag specifies the ports to check.

## Discover hidden directories and files
cat domains.txt | dirsearh  --stdin

Explanation:

dirsearch is a web path scanner that will search for hidden files and directories, the --stdin flag tells the tool to read the input from the pipe.

## Scan all subdomains
amass enum -brute -passive -d https://example.com | sed 's#*.# #g' | httpx -silent -threads 10 | xargs -I@ sh -c 'ffuf -w wordlist.txt -u @/FUZZ -mc 200'

Explanation:

amass is a subdomain enumeration tool that can be used to find all subdomains of a given domain. The output of amass is piped to httpx, which is a tool to check if the subdomains are alive. The output of httpx is piped to ffuf, which is a tool to brute force directories and files.

## Gather domains from content-security-policy
curl -v -silent https://example.com --stderr - | awk '/^content-security-policy:/' | grep -Eo "[a-zA-Z0-9./?=_-]*" |  sed -e '/\./!d' -e '/[^A-Za-z0-9._-]/d' -e 's/^\.//' | sort -u

Explanation:

curl is used to make a request to the target website. The output of curl is piped to awk, which is used to extract the content-security-policy header. The output of awk is piped to grep, which is used to extract the domains from the header. The output of grep is piped to sed, which is used to remove the domains that don't have a dot in them. The output of sed is piped to sort, which is used to remove duplicates.

## Extract Endpoints from JavaScript files
cat FILE.js | grep -oh "\"\/[a-zA-Z0-9_/?=&]*\"" | sed -e 's/^"//' -e 's/"$//' | sort -u

More one-liners:

https://github.com/dwisiswant0/awesome-oneliner-bugbounty

https://reconshell.com/awesome-one-liner-bug-bounty/

https://infosecwriteups.com/cors-one-liner-command-exploiter-88c06903cca0