Publish Layerfault deep challenge LF-CH-MCONT-0010

CHALLENGE_ORACLE.json

@@ -0,0 +1,31 @@
+{
+  "attack_surface": [
+    "media-container",
+    "media-metadata"
+  ],
+  "control_type": "compound",
+  "corpus_id": "LF-CH-MCONT-0010",
+  "difficulty": "compound",
+  "expected_decision": "BLOCK",
+  "ground_truth": "synthetic-generated",
+  "layerfault_rule_expectations": {
+    "candidate_rules": [],
+    "expected_rules": [],
+    "must_not_rules": []
+  },
+  "oracle_ids": [
+    "LF-ORACLE-MEDIA-NESTED-CONTAINER"
+  ],
+  "related_cases": [],
+  "repo_name": "media-nested-image-zip-image",
+  "safe_fixture": true,
+  "schema": 2,
+  "severity": "critical",
+  "techniques": [
+    "nested-image",
+    "nested-archive"
+  ],
+  "transformations": [
+    "nesting"
+  ]
+}

FIXTURE_LAYOUT.json

@@ -0,0 +1,8 @@
+{
+  "artifacts": [
+    "preview.png"
+  ],
+  "family": "media",
+  "note": "All content is synthetic and inert. Do not treat this as a production model.",
+  "repo_name": "media-nested-image-zip-image"
+}

LAYERFAULT_CORPUS.json

@@ -0,0 +1,39 @@
+{
+  "candidate_rules": [],
+  "challenge": {
+    "attack_surface": [
+      "media-container",
+      "media-metadata"
+    ],
+    "control_type": "compound",
+    "difficulty": "compound",
+    "expected_decision": "BLOCK",
+    "oracle_ids": [
+      "LF-ORACLE-MEDIA-NESTED-CONTAINER"
+    ],
+    "related_cases": [],
+    "severity": "critical",
+    "techniques": [
+      "nested-image",
+      "nested-archive"
+    ],
+    "transformations": [
+      "nesting"
+    ]
+  },
+  "corpus_id": "LF-CH-MCONT-0010",
+  "description": "Image appends a ZIP containing another image with marker metadata.",
+  "expected_rules": [],
+  "generator": "challenges.generate_challenge",
+  "ground_truth": "synthetic-generated",
+  "must_not_rules": [],
+  "repo_name": "media-nested-image-zip-image",
+  "repo_type": "model",
+  "safe_fixture": true,
+  "safety": "inert/canary-only",
+  "schema": 1,
+  "validation": {
+    "kind": "verify-package",
+    "target": "."
+  }
+}

README.md

@@ -0,0 +1,73 @@
+---
+license: apache-2.0
+tags:
+- layerfault
+- security-research
+- model-security
+- synthetic
+- adversarial-testing
+extra_gated_prompt: >-
+  This repository is a synthetic security-test artifact from the Layerfault
+  corpus. It intentionally contains adversarial characteristics (e.g.
+  suspicious pickle opcodes, executable-format smuggling, prompt-injection
+  strings) designed to exercise security scanner detection rules. It is
+  **not** a usable ML model and must never be loaded or executed outside an
+  isolated scanner-testing environment. By accepting, you confirm you
+  understand this repository is a test fixture, not production model
+  weights.
+extra_gated_button_content: I understand this is a security test fixture and accept the risk
+gated: auto
+---
+
+# media-nested-image-zip-image
+
+> **SECURITY TEST ARTIFACT: DO NOT USE AS A PRODUCTION MODEL**
+
+This repository is part of the Layerfault synthetic security corpus.
+It is deliberately constructed to contain security-relevant characteristics for scanner testing.
+
+**Corpus ID:** `LF-CH-MCONT-0010`
+
+## Purpose
+
+Image appends a ZIP containing another image with marker metadata.
+
+## Direct expected Layerfault rules
+
+- None; this repository is a control/comparison input.
+
+## Candidate rules
+
+These are deliberately plausible targets that remain marked as candidates until the exact
+Layerfault build used for certification confirms them.
+
+- None
+
+## Negative-control rules
+
+These should remain silent for this corpus item.
+
+- None
+
+## Safety
+
+The corpus uses fake secrets, loopback/`.invalid` network destinations, harmless marker output,
+and synthetic model behavior only. It is intended for static scanning and isolated security testing.
+
+## Challenge classification
+
+- Severity: **critical**
+- Difficulty: **compound**
+- Expected admission decision: **BLOCK**
+- Control type: **compound**
+- Attack surface: media-container, media-metadata
+- Techniques: nested-image, nested-archive
+- Transformations: nesting
+
+### Ground-truth oracle IDs
+
+- `LF-ORACLE-MEDIA-NESTED-CONTAINER`
+
+These oracle IDs describe synthetic ground truth. They do not claim that a
+matching Layerfault detector already exists. A challenge may intentionally expose
+a scanner blind spot and remain unmapped until the detector is implemented.

SHA256SUMS.json

@@ -0,0 +1,27 @@
+[
+  {
+    "path": "CHALLENGE_ORACLE.json",
+    "sha256": "64f2a961dfeb55da7b17d3f5e3851ae175c951e61e35acd6d99f44503699f828",
+    "size": 662
+  },
+  {
+    "path": "FIXTURE_LAYOUT.json",
+    "sha256": "1f89d6d0600c92268a39f512e80c2c27f49aa3ec462b838a6190c564a2589b50",
+    "size": 201
+  },
+  {
+    "path": "LAYERFAULT_CORPUS.json",
+    "sha256": "e0dff5ddcba6c6b9912e3479a71850f34629b07fb6b78bfe8911cc7019d593e7",
+    "size": 938
+  },
+  {
+    "path": "README.md",
+    "sha256": "f598e1038afe35a542eb36f0f5e9b750c2f982714632068b74c94ebd6423960b",
+    "size": 2277
+  },
+  {
+    "path": "preview.png",
+    "sha256": "86aff9b7b6ba71bbacfa98c14d7e49a99002b522fc5b1c81b523e725a5278f48",
+    "size": 2050
+  }
+]