JenkinsEnvHunter & CheckNoAuth

This repository contains two helper scripts for inspecting Jenkins instances:

• 'jenkins-env-hunter' / JenkinsEnvHunter.py — enumerates Jenkins jobs and builds, fetches environment variables (including EnvInject), and highlights likely sensitive keys.
• jenkins-check-noauth / CheckNoAuth.py — scans a list of hosts (or a Nessus .nessus export) to detect Jenkins instances and whether anonymous access is allowed.

Only run these scripts against systems you own or have explicit permission to test.

Install from PIP:

pip install jenkinsenvhunter    

Then:

jenkins-env-hunter --help
jenkins-check-noauth --help

Requirements

• Python 3.7+
• requests (required)
• alive-progress (optional, progress bars)

Install dependencies (if from git clone)

pip install requests alive-progress

---

CheckNoAuth.py & jenkins-check-noauth

Purpose: quickly determine which hosts are running Jenkins and whether anonymous access is allowed. The script can also extract hosts from Nessus .nessus exports (plugin 65054).

Usage examples (Python and PIP versions listed)

# Scan hosts listed in hosts.txt using HTTP
python CheckNoAuth.py -f hosts.txt
jenkins-check-noauth -f hosts.txt

# Scan hosts using HTTPS and 4 threads
python CheckNoAuth.py -f hosts.txt --ssl -n 4
jenkins-check-noauth -f hosts.txt --ssl -n 4

# Extract Jenkins hosts from a Nessus export and scan them
python CheckNoAuth.py -x scan.nessus
jenkins-check-noauth -x scan.nessus

# Verbose output for troubleshooting a single host
python CheckNoAuth.py -f single-host.example.local:8080 -v
jenkins-check-noauth -f single-host.example.local:8080 -v

Options summary

-f, --file       File with hosts (one per line: HOST, HOST:PORT, http://host:port, [::1]:8080)
-x, --nessus     Nessus .nessus file - extract Jenkins hosts from plugin 65054
-v, --verbose    Print HTTP requests/responses (debug)
--ssl            Use HTTPS (default is HTTP)
-t, --timeout    Request timeout seconds (default: 5)
-n, --threads    Worker threads (default: 1)

Output

• Per-host lines indicate whether Jenkins was detected and whether authentication appears required.
• When anonymous access is detected, the script attempts to check /manage/ and reports its accessibility.
• A final summary lists counts and servers allowing anonymous access.

---

JenkinsEnvHunter.py & jenkins-env-hunter

Purpose: enumerate Jenkins jobs and builds and fetch environment variables. Finds likely sensitive variables by default (regex matching user|pass|key|auth|token|secret) and can save results to a file.

Usage examples

# Scan a Jenkins instance (no auth) and print findings to console
python JenkinsEnvHunter.py --url http://jenkins.example.local/
jenkins-env-hunter --url http://jenkins.example.local/

# Scan and save results to a file
python JenkinsEnvHunter.py --url http://jenkins.example.local/ --output findings.txt
jenkins-env-hunter --url http://jenkins.example.local/ --output findings.txt

# Scan using credentials (authenticated Jenkins)
python JenkinsEnvHunter.py --url https://jenkins.example.local/ --user alice --token myapitoken --output findings.txt
jenkins-env-hunter --url https://jenkins.example.local/ --user alice --token myapitoken --output findings.txt

# Include all environment variables (not only flagged ones)
python JenkinsEnvHunter.py --url http://jenkins.example.local/ --all
jenkins-env-hunter --url http://jenkins.example.local/ --all

Options summary

--url        Jenkins base URL (required), e.g. http://jenkins.example.local/
--user       Jenkins username (optional)
--token      Jenkins API token or password (optional)
--output     Save findings to a file (optional)
--all        Include all environment variables (not just suspicious ones)
--quiet      Reduce console output
-v, --verbose  Show HTTP request/response info (troubleshooting)
--noredirect   Keep requests on the original host:port (useful when proxied)
--threads    Number of worker threads (default: 8)

Notes

• Default sensitive-key matcher is re.compile(r"(user|pass|key|auth|token|secret)", re.IGNORECASE). Edit JenkinsEnvHunter.py to change matching rules.
• Use --noredirect to avoid following redirects that change host/path in reverse-proxied environments.
• When using --output, findings are appended to the specified file.

---

Example workflow

1. Discover potentially anonymous Jenkins servers:

python CheckNoAuth.py -f hosts.txt -n 8
jenkins-check-noauth -f hosts.txt -n 8

2. For a discovered server that allows anonymous access, run a targeted environment scan:

python JenkinsEnvHunter.py --url http://jenkins.example.local/ --output scan_report.txt
jenkins-env-hunter --url http://jenkins.example.local/ --output scan_report.txt

---

Security & Responsible Use

Only run these tools against systems you own or are authorized to test. Do not attempt to access, enumerate, or exploit services without explicit permission.

---

Contributing

If you find detection gaps or want to improve regex rules or parsing logic, please open a pull request with non-sensitive test cases or sample output.