feat(scanner): reject plugin gem push and nuget push

CHANGELOG.d/1099-claude-plugin-supply-chain.md

@@ -162,12 +162,15 @@
   `claude-plugin-pnpm-publish-command`. ``uv publish`` fails as
   `claude-plugin-uv-publish-command`. ``poetry publish`` fails as
   `claude-plugin-poetry-publish-command`. ``yarn npm publish`` stays
-  `claude-plugin-npm-publish-command`.
+  `claude-plugin-npm-publish-command`. ``gem push`` fails as
+  `claude-plugin-gem-push-command`. ``nuget push`` and
+  ``dotnet nuget push`` fail as `claude-plugin-nuget-push-command`.
   Hook comments and
   ``echo``/``printf`` lookalikes are not those classes.
   ``terraform plan``, ``helm list``,
   ``vercel ls``, ``fly status``, ``aws s3 ls``, ``gcloud config list``,
-  ``az account show``, ``npm pack``, and ``cargo check``
+  ``az account show``, ``npm pack``, ``cargo check``, ``gem list``,
+  and ``nuget list``
   stay inventory. Hardcoded
   PATs stay `claude-plugin-github-write-token`. Snippets are command
   labels, not tokens.

appguardrail_core/claude_plugin_detector.py

@@ -34,11 +34,13 @@
 ``cargo publish`` fail closed as registry-publish command findings.
 Hook or manifest ``pnpm publish``, ``uv publish``, and
 ``poetry publish`` fail closed as alternate-manager registry writes.
+Hook or manifest ``gem push`` and ``nuget push`` fail closed as
+RubyGems and NuGet registry writes.
 Unquoted ``#`` comments and
 ``echo``/``printf``/``print`` lookalikes are not that class.
 ``terraform plan``, ``helm list``, ``vercel ls``, ``fly status``,
 ``aws s3 ls``, ``gcloud config list``, ``az account show``,
-``npm pack``, and ``cargo check``
+``npm pack``, ``cargo check``, ``gem list``, and ``nuget list``
 stay inventory. Hook or manifest paths into
 ``~/.netrc``, ``~/.aws/credentials``,
 GitHub CLI hosts, Docker auth ``config.json``, cookie jars, and
@@ -48,7 +50,7 @@
 ``gh issue create``, ``gh pr review``, ``kubectl get``, ``docker ps``,
 ``terraform plan``, ``helm list``, ``vercel ls``, ``fly status``,
 ``aws s3 ls``, ``gcloud config list``, ``az account show``,
-``npm pack``, and ``cargo check``
+``npm pack``, ``cargo check``, ``gem list``, and ``nuget list``
 stay inventory. Skill
 homoglyph, injection, exfiltration, and placeholder hits reuse #1036 rule
 identities. Skill, command, or agent text that hides tool use, rewrites
@@ -346,6 +348,16 @@
     "distribution is write authority on PyPI. Remove the command. "
     "[CWE-250 - Execution with Unnecessary Privileges]"
 )
+CLAUDE_PLUGIN_GEM_PUSH_COMMAND_MESSAGE: Final = (
+    "Claude plugin hook or manifest runs gem push. Publishing a gem is "
+    "write authority on RubyGems. Remove the command. "
+    "[CWE-269 - Improper Privilege Management]"
+)
+CLAUDE_PLUGIN_NUGET_PUSH_COMMAND_MESSAGE: Final = (
+    "Claude plugin hook or manifest runs nuget push. Publishing a package "
+    "is write authority on NuGet. Remove the command. "
+    "[CWE-250 - Execution with Unnecessary Privileges]"
+)
 CLAUDE_PLUGIN_DOCKER_SOCKET_MESSAGE: Final = (
     "Claude plugin hook reaches the host Docker socket. Socket access is host "
     "control, not an image push. Remove the socket bind and keep builds "
@@ -501,6 +513,11 @@
 _PNPM_PUBLISH_COMMAND = re.compile(r"\bpnpm\s+publish\b", re.IGNORECASE)
 _UV_PUBLISH_COMMAND = re.compile(r"\buv\s+publish\b", re.IGNORECASE)
 _POETRY_PUBLISH_COMMAND = re.compile(r"\bpoetry\s+publish\b", re.IGNORECASE)
+_GEM_PUSH_COMMAND = re.compile(r"\bgem\s+push\b", re.IGNORECASE)
+_NUGET_PUSH_COMMAND = re.compile(
+    r"\b(?:dotnet\s+)?nuget\s+push\b",
+    re.IGNORECASE,
+)
 _REPORTING_BUILTINS: Final = frozenset(
     {":", "echo", "false", "print", "printf", "true"}
 )
@@ -811,7 +828,8 @@
         re.compile(
             r"\b(?:pip|npm|pnpm|yarn|uv|cargo|apt-get)\s+install\b|"
             r"\b(?:npm\s+publish|pnpm\s+publish|twine\s+upload|cargo\s+publish|"
-            r"uv\s+publish|poetry\s+publish)\b",
+            r"uv\s+publish|poetry\s+publish|gem\s+push|"
+            r"(?:dotnet\s+)?nuget\s+push)\b",
             re.IGNORECASE,
         ),
     ),
@@ -1037,6 +1055,8 @@ def inspect_claude_plugin_file(
         hits.extend(_pnpm_publish_command_hits(content, manifest=manifest))
         hits.extend(_uv_publish_command_hits(content, manifest=manifest))
         hits.extend(_poetry_publish_command_hits(content, manifest=manifest))
+        hits.extend(_gem_push_command_hits(content, manifest=manifest))
+        hits.extend(_nuget_push_command_hits(content, manifest=manifest))
         hits.extend(_docker_socket_hits(content))
         hits.extend(_browser_profile_hits(content))
         hits.extend(_credential_store_hits(content))
@@ -2835,6 +2855,62 @@ def _poetry_publish_command_hits(
     return ()
 
 
+def _gem_push_command_hits(
+    content: str, *, manifest: bool = False
+) -> tuple[PluginHit, ...]:
+    """Return ``gem push`` findings with a command label, not gem names.
+
+    Args:
+        content: Hook or manifest text.
+        manifest: When true, only structural command values are scanned.
+
+    Returns:
+        One hit for executable ``gem push``. ``gem list``, comments, and
+        echo lookalikes are not this class.
+    """
+    for source, first_line in _hosted_command_sources(content, manifest=manifest):
+        match = _executable_command_match(source, _GEM_PUSH_COMMAND)
+        if match is None:
+            continue
+        return (
+            PluginHit(
+                rule_id="claude-plugin-gem-push-command",
+                line=first_line + source[: match.start()].count("\n"),
+                snippet="gem push",
+                message=CLAUDE_PLUGIN_GEM_PUSH_COMMAND_MESSAGE,
+            ),
+        )
+    return ()
+
+
+def _nuget_push_command_hits(
+    content: str, *, manifest: bool = False
+) -> tuple[PluginHit, ...]:
+    """Return ``nuget push`` findings with a command label, not package names.
+
+    Args:
+        content: Hook or manifest text.
+        manifest: When true, only structural command values are scanned.
+
+    Returns:
+        One hit for executable ``nuget push`` or ``dotnet nuget push``.
+        ``nuget list`` is not this class.
+    """
+    for source, first_line in _hosted_command_sources(content, manifest=manifest):
+        match = _executable_command_match(source, _NUGET_PUSH_COMMAND)
+        if match is None:
+            continue
+        return (
+            PluginHit(
+                rule_id="claude-plugin-nuget-push-command",
+                line=first_line + source[: match.start()].count("\n"),
+                snippet="nuget push",
+                message=CLAUDE_PLUGIN_NUGET_PUSH_COMMAND_MESSAGE,
+            ),
+        )
+    return ()
+
+
 def _dynamic_eval_hits(content: str) -> tuple[PluginHit, ...]:
     """Return findings for eval/exec/compile/Function on hook surfaces."""
     match = _DYNAMIC_EVAL.search(content)

docs/TRACEABILITY.md

@@ -22,7 +22,7 @@
 | structural Semgrep-style `pattern:` execution by lightweight engine | built-in scanner | not implemented unless a real structural matcher is added; fixtures are not execution |
 | GitHub Actions transport-only polling loop (#1087, #938 vertical slice) | owned by PR #1088 / issue #1087; YAML rules and RED precision contracts | mapped-family only; this successor does not ship or close the detector |
 | Password/database-url/auth-comment precision and test-file context (#1106) | existing `_scan_file` rules `hardcoded-password`, `hardcoded-database-url`, `todo-skip-auth`, `_finding_context` | implemented-branch regression lock |
-| Claude plugin marketplace/package supply chain (#1099) | `claude-plugin-floating-git-ref`, `claude-plugin-provider-secret`, `claude-plugin-pipe-to-shell`, `claude-plugin-unsigned-executable-download` (hooks and package.json lifecycle scripts), `claude-plugin-unpinned-package-install`, `claude-plugin-undeclared-executable`, `claude-plugin-symlink-escape`, `claude-plugin-archive-path-traversal`, `claude-plugin-unadmitted-submodule`, `claude-plugin-duplicate-json-member`, `claude-plugin-nonstandard-json-constant`, `claude-plugin-malformed-utf8`, `claude-plugin-inconsistent-normalized-name`, `claude-plugin-vendored-scope-undeclared`, `claude-plugin-conflicting-identity`, `claude-plugin-unbounded-mcp`, `claude-plugin-license-missing`, `claude-plugin-license-mismatch`, `claude-plugin-dynamic-eval`, `claude-plugin-hidden-undeclared-executable`, `claude-plugin-concealed-identity`, `claude-plugin-oversized-package`, `claude-plugin-source-mismatch`, `claude-plugin-github-write-token`, `claude-plugin-docker-socket`, `claude-plugin-browser-profile-access`, `claude-plugin-deceptive-description`, `claude-plugin-secret-to-network`, `claude-plugin-secret-to-prompt`, `claude-plugin-secret-to-mcp`, `claude-plugin-hide-actions-directive` / `claude-plugin-self-modify-directive` / `claude-plugin-goal-escalation-directive`, `claude-plugin-setuid-executable` / `claude-plugin-world-writable-executable`, `claude-plugin-decompression-bomb`, reused #1036 `skill-name-homoglyph-confusable` / `skill-manifest-prompt-injection-payload` / `skill-doc-exfiltration-endpoint-directive` / `skill-placeholder-template-unresolved` on plugin skill/agent/command surfaces, deterministic scan receipt with catalog repository/SHA bind, SARIF 2.1.0 `sarif_sha256` bound to the same finding rule_ids, `policy_provenance` bound to the AppGuardrail release plus exact scan-policy digest, and `sbom_sha256` of a deterministic CycloneDX 1.5 document, `claude-plugin-checksum-mismatch` when a first-party SHA256SUMS or sibling `*.sha256` disagrees with bytes on disk, `claude-plugin-unsigned-checksum` when checksum digest rows have no sibling Cosign/GPG signature file, `claude-plugin-excessive-path-depth` when a materialized file or archive member nests past 32 path components, `claude-plugin-github-merge-command` for hook or manifest `gh pr merge`, `claude-plugin-github-release-command` for `gh release create|upload|delete|edit`, `claude-plugin-kubectl-apply-command` for hook or manifest `kubectl apply`, `claude-plugin-docker-push-command` for `docker push`, `claude-plugin-terraform-apply-command` for `terraform apply`, `claude-plugin-helm-install-command` for `helm install`, `claude-plugin-vercel-deploy-command` for hook or manifest `vercel deploy`, `claude-plugin-fly-deploy-command` for `fly deploy`, `claude-plugin-aws-deploy-command` for hook or manifest `aws cloudformation deploy`, `claude-plugin-gcloud-deploy-command` for `gcloud run deploy`, `claude-plugin-az-deploy-command` for `az webapp deploy`, `claude-plugin-aws-s3-write-command` for hook or manifest `aws s3 sync`/`cp`, `claude-plugin-az-containerapp-up-command` for `az containerapp up`, `claude-plugin-npm-publish-command` for hook or manifest `npm publish`, `claude-plugin-pypi-upload-command` for `twine upload`, `claude-plugin-cargo-publish-command` for `cargo publish`, `claude-plugin-pnpm-publish-command` for `pnpm publish`, `claude-plugin-uv-publish-command` for `uv publish`, `claude-plugin-poetry-publish-command` for `poetry publish`, `claude-plugin-credential-store-access` for host cookie and token stores that are not browser profiles, fail-closed receipt verification | implemented-branch |
+| Claude plugin marketplace/package supply chain (#1099) | `claude-plugin-floating-git-ref`, `claude-plugin-provider-secret`, `claude-plugin-pipe-to-shell`, `claude-plugin-unsigned-executable-download` (hooks and package.json lifecycle scripts), `claude-plugin-unpinned-package-install`, `claude-plugin-undeclared-executable`, `claude-plugin-symlink-escape`, `claude-plugin-archive-path-traversal`, `claude-plugin-unadmitted-submodule`, `claude-plugin-duplicate-json-member`, `claude-plugin-nonstandard-json-constant`, `claude-plugin-malformed-utf8`, `claude-plugin-inconsistent-normalized-name`, `claude-plugin-vendored-scope-undeclared`, `claude-plugin-conflicting-identity`, `claude-plugin-unbounded-mcp`, `claude-plugin-license-missing`, `claude-plugin-license-mismatch`, `claude-plugin-dynamic-eval`, `claude-plugin-hidden-undeclared-executable`, `claude-plugin-concealed-identity`, `claude-plugin-oversized-package`, `claude-plugin-source-mismatch`, `claude-plugin-github-write-token`, `claude-plugin-docker-socket`, `claude-plugin-browser-profile-access`, `claude-plugin-deceptive-description`, `claude-plugin-secret-to-network`, `claude-plugin-secret-to-prompt`, `claude-plugin-secret-to-mcp`, `claude-plugin-hide-actions-directive` / `claude-plugin-self-modify-directive` / `claude-plugin-goal-escalation-directive`, `claude-plugin-setuid-executable` / `claude-plugin-world-writable-executable`, `claude-plugin-decompression-bomb`, reused #1036 `skill-name-homoglyph-confusable` / `skill-manifest-prompt-injection-payload` / `skill-doc-exfiltration-endpoint-directive` / `skill-placeholder-template-unresolved` on plugin skill/agent/command surfaces, deterministic scan receipt with catalog repository/SHA bind, SARIF 2.1.0 `sarif_sha256` bound to the same finding rule_ids, `policy_provenance` bound to the AppGuardrail release plus exact scan-policy digest, and `sbom_sha256` of a deterministic CycloneDX 1.5 document, `claude-plugin-checksum-mismatch` when a first-party SHA256SUMS or sibling `*.sha256` disagrees with bytes on disk, `claude-plugin-unsigned-checksum` when checksum digest rows have no sibling Cosign/GPG signature file, `claude-plugin-excessive-path-depth` when a materialized file or archive member nests past 32 path components, `claude-plugin-github-merge-command` for hook or manifest `gh pr merge`, `claude-plugin-github-release-command` for `gh release create|upload|delete|edit`, `claude-plugin-kubectl-apply-command` for hook or manifest `kubectl apply`, `claude-plugin-docker-push-command` for `docker push`, `claude-plugin-terraform-apply-command` for `terraform apply`, `claude-plugin-helm-install-command` for `helm install`, `claude-plugin-vercel-deploy-command` for hook or manifest `vercel deploy`, `claude-plugin-fly-deploy-command` for `fly deploy`, `claude-plugin-aws-deploy-command` for hook or manifest `aws cloudformation deploy`, `claude-plugin-gcloud-deploy-command` for `gcloud run deploy`, `claude-plugin-az-deploy-command` for `az webapp deploy`, `claude-plugin-aws-s3-write-command` for hook or manifest `aws s3 sync`/`cp`, `claude-plugin-az-containerapp-up-command` for `az containerapp up`, `claude-plugin-npm-publish-command` for hook or manifest `npm publish`, `claude-plugin-pypi-upload-command` for `twine upload`, `claude-plugin-cargo-publish-command` for `cargo publish`, `claude-plugin-pnpm-publish-command` for `pnpm publish`, `claude-plugin-uv-publish-command` for `uv publish`, `claude-plugin-poetry-publish-command` for `poetry publish`, `claude-plugin-gem-push-command` for hook or manifest `gem push`, `claude-plugin-nuget-push-command` for `nuget push`, `claude-plugin-credential-store-access` for host cookie and token stores that are not browser profiles, fail-closed receipt verification | implemented-branch |
 | Orphaned GitHub Actions registry identities (#929) | owned by PR #966 / issue #929; live registry DAST | mapped-family only; this successor does not ship or close the detector |
 | Org security-failure CI tickets without copied vuln evidence | documented non-detectable family | snapshot in `tests/fixtures/cwl-security-issue-inventory.json` |
 

docs/sast-dast-rule-research.md

@@ -118,6 +118,8 @@ files being scanned, then applies the union of relevant checks. Examples:
   `claude-plugin-pnpm-publish-command` for ``pnpm publish``,
   `claude-plugin-uv-publish-command` for ``uv publish``,
   `claude-plugin-poetry-publish-command` for ``poetry publish``,
+  `claude-plugin-gem-push-command` for ``gem push``,
+  `claude-plugin-nuget-push-command` for ``nuget push``,
   and
   `claude-plugin-credential-store-access` for host ``~/.netrc``,
   ``~/.aws/credentials``, GitHub CLI hosts, Docker auth, cookie jars, and
@@ -126,7 +128,8 @@ files being scanned, then applies the union of relevant checks. Examples:
   `claude-plugin-github-write-token`. ``gh issue create``, ``gh pr review``,
   ``kubectl get``, ``docker ps``, ``terraform plan``, ``helm list``,
   ``vercel ls``, ``fly status``, ``aws s3 ls``, ``gcloud config list``,
-  ``az account show``, ``npm pack``, and ``cargo check`` stay inventory.
+  ``az account show``, ``npm pack``, ``cargo check``, ``gem list``,
+  and ``nuget list`` stay inventory.
 - Mapped, not owned here: GitHub Actions transport-only poll loops (#1087,
   PR #1088) and orphaned workflow registry DAST (#929, PR #966).
 - `tool-execute-parameters-passthrough`: Strix-observed dynamic tool execution