hunt-saml SKILL.md skillA

hunt-saml from novaestellar/novahaku is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add novaestellar/novahaku/hunt-saml@git:20260910.546fe86

Pins git:20260910.546fe86 in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: novaestellar/novahaku
Path: testing/hunt/hunt-saml/SKILL.md
Versions recorded: 3
Latest version: git:20260910.546fe86, committed Sep 10, 2026
First version recorded: Sep 3, 2026
Size: 6,757 bytes
Repository stars: 28
License: MIT

Hunt SAML / SSO attacks. Patterns: XML Signature Wrapping (XSW) — modify Assertion while keeping Signature valid by relocating signed element, comment injection in NameID (admin@target.com@attacker.com → some parsers see admin@target.com), signature stripping (remove Signature element entirely, server should reject but doesn't), key confusion (signed by attacker's IdP, accepted by SP), audience-restriction not validated, replay attack (same Assertion accepted twice within validity…

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

## 20. SAML / SSO ATTACKS
> SSO bugs frequently pay High–Critical. XML parsers are notoriously inconsistent.

### Attack Surface
```bash
# Find SAML endpoints
cat recon/$TARGET/urls.txt | grep -iE "saml|sso|login.*redirect|oauth|idp|sp"
# Key endpoints: /saml/acs (assertion consumer service), /sso/saml, /auth/saml/callback
```

### Attack 1: XML Signature Wrapping (XSW)
```xml
<!-- BEFORE: valid assertion by user@company.com -->
<saml:Response>
  <saml:Assertion ID="legit">
    <NameID>user@company.com</NameID>
    <ds:Signature><!-- Valid, covers ID=legit --></ds:Signature>
  </saml:Assertion>
</saml:Response>

<!-- AFTER: inject evil assertion. Signature still validates (covers #legit).
     App processes the FIRST assertion found = evil. -->
<saml:Response>
  <saml:Assertion ID="evil">
    <NameID>admin@company.com</NameID>  <!-- Attacker-controlled -->
  </saml:Assertion>
  <saml:Assertion ID="legit">
    <NameID>user@company.com</NameID>
    <ds:Signature><!-- Valid --></ds:Signature>
  </saml:Assertion>
</saml:Response>
```

### Attack 2: Comment Injection in NameID
```xml
<!-- Attacker registers/controls account: admin@company.com.evil.com -->
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add novaestellar/novahaku/hunt-saml@sha256:5c41f374be17092d

The line at the top of this page pins the label git:20260910.546fe86, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

[![mdr](https://markdownregistry.com/badge/art_k5kyjjie75meityu.svg)](https://markdownregistry.com/a/art_k5kyjjie75meityu)

4 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 3 versions of this file, between Sep 3, 2026 and Sep 10, 2026, about one every 3 days.

version	committed	commit	size	audit
git:20260910.546fe86 latest	2026-09-10	546fe86	6,757 B	A	view · diff
git:20260903.29924dd	2026-09-03	29924dd	6,769 B	A	view · diff
git:20260903.fa855c4	2026-09-03	fa855c4	6,740 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (6757 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag

Source

GitHub

novaestellar/novahaku · 28 stars · license MIT · pushed 2026-09-28 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_k5kyjjie75meityu
GET https://markdownregistry.com/api/v1/resolve?ref=novaestellar/novahaku/hunt-saml
GET https://markdownregistry.com/api/v1/blob/5c41f374be17092d17f49f65110e7c5ad7c2a4480b11f6d960a9e1d7cb652797

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

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