hunt-ssrf

⚠️ AUTHORIZED USE ONLY This skill is for educational purposes or authorized security assessments only. You must have explicit, written permission from the system owner before using this tool. Misuse of this tool is illegal and strictly prohibited.

Mandatory confirmation gate Before running any command that probes, exploits, changes, persists on, extracts data from, or attempts credential access against a target:

1. Ask the user to state the exact target URL, IP, account, or resource.
2. Ask the user to confirm written authorization and the permitted scope.
3. Show the exact command(s) and explain their expected effect.
4. Wait for explicit confirmation in the current conversation.

Without that confirmation, remain read-only and provide defensive guidance only. Prefer a sandbox, disposable VM, or controlled lab.

Crown Jewel Targets

SSRF is highest-value when the target runs on cloud infrastructure (AWS, GCP, Azure) where metadata services expose credentials, or when the server sits inside a complex internal network (Kubernetes clusters, microservice meshes, internal APIs). Priority targets:

• Cloud-hosted SaaS products (GCP metadata at 169.254.169.254 or metadata.google.internal, AWS IMDSv1)
• Kubernetes/orchestration platforms — aggregated API servers, metrics-server, kubelet endpoints expose privileged cluster operations
• Internal developer tooling — CI/CD, workflow orchestration (Flyte, Argo), admin panels not exposed externally
• Link preview / URL fetching features — Reddit-style preview APIs, Slack-style unfurling, media processors
• Dataset/file import pipelines — anything that fetches remote URLs on behalf of a user
• Enterprise self-hosted software (GitHub Enterprise, GitLab) — SSRF frequently chains to RCE via internal services

Payouts are highest when SSRF reaches: cloud credentials → account takeover, internal admin APIs → data exfil, or chains to RCE.

OOB-Or-It-Didn't-Happen Gate (Read First)

Claims of blind SSRF require an out-of-band (OOB) confirmation. Always. No exceptions.

OOB means: a Burp Collaborator domain, an interactsh-client listener, a canarytoken, or any DNS+HTTP receiver you control that confirms the server actually made an outbound network connection on your behalf.

What is NOT confirmation of SSRF

• The server echoing your URL back in an error message. Example: "The Web application at http://evil.example.com/x could not be found" — this is the server formatting your input into an error string, NOT making an outbound HTTP request. The error came from string formatting, not from network failure.
• The server returning a different status code for an external URL vs localhost. Different error responses can come from URL-scheme validators, not from actual fetching.
• A delayed response when the URL is sent. Delay can come from DNS resolution attempts within the parser, not from completed HTTP fetches.

What IS confirmation of SSRF

• A DNS lookup for your unique Collaborator subdomain appears in the OOB listener.
• An HTTP request to your Collaborator HTTP endpoint with the server's source IP and User-Agent.
• For SSRF in JavaScript-execution contexts (PDF renderers, headless browsers), a fetch from the server to your callback URL.

Default workflow

1. Plant the Collaborator payload first. Sub-tagging (dlsrcurl.<collab>, import.<collab>) only works if your listener actually reports the queried subdomain back to you — verify that before relying on it. Burp's get_collaborator_interactions keys results by payload ID, not by subdomain, so several sub-tags generated from one payload are indistinguishable in the output. When that is the case, generate a fresh payload per candidate parameter and send exactly one request per payload.
2. Send the request to the target endpoint.
3. Wait 30–120 seconds, then poll the OOB listener.
4. Only after a confirmed callback do you claim SSRF.
5. If zero callbacks across all sub-tagged sinks: SSRF claims must be retracted, even if error messages echo URLs.

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