Strip stale raw-network capabilities from agent images by Copilot · Pull Request #7659 · github/gh-aw-firewall

Copilot · 2026-08-23T15:32:05Z

ping and mtr-packet retained inert cap_net_raw file capabilities in runner-based agent images, creating unnecessary attack surface if the capability bounding set regresses.

Image hardening
- Strip all file capabilities from both binaries when present.
- Fail the image build if capability removal does not succeed.
Regression coverage
- Verify the Dockerfile covers both binaries and retains fail-closed validation.

Fixes Security finding #7658

Copilot

Pull request overview

Hardens agent images by removing stale raw-network file capabilities.

Changes:

Removes capabilities from ping and mtr-packet.
Adds static regression coverage for the Dockerfile hardening.

Show a summary per file

File	Description
`containers/agent/Dockerfile`	Adds capability removal and validation.
`scripts/ci/agent-dockerfile-security.test.ts`	Checks for the hardening block.

Review details

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Files reviewed: 2/2 changed files
Comments generated: 2
Review effort level: Balanced

+        setcap -r "$binary" 2>/dev/null || true; \
+        if getcap "$binary" | grep -q .; then \
+          echo "ERROR: Failed to remove file capabilities from $binary" >&2; \
+          exit 1; \
+        fi; \


+    expect(hardeningBlock).toContain('setcap -r "$binary"');
+    expect(hardeningBlock).toContain('getcap "$binary"');
+    expect(hardeningBlock).toContain('exit 1');


lpcox · 2026-08-23T16:13:34Z

@copilot address review feedback

github-actions · 2026-08-23T16:18:29Z

✅ Copilot review passed with no inline comments.

@copilot Add the ready-for-aw label to this PR to trigger agentic CI smoke tests.

Copilot · 2026-08-23T16:18:29Z

@copilot address review feedback

Addressed in 84bf722: capability inspection/removal now fails closed, and the regression test exercises failing getcap/setcap stubs plus the no-capability path. Targeted Jest test and CodeQL both pass.

github-actions · 2026-08-23T16:21:21Z

✅ Coverage Check Passed

Overall Coverage

Metric	Base	PR	Delta
Lines	93.71%	93.73%	📈 +0.02%
Statements	92.57%	92.59%	📈 +0.02%
Functions	92.88%	92.88%	➡️ +0.00%
Branches	85.82%	85.84%	📈 +0.02%

📁 Per-file Coverage Changes (1 files)

File	Lines (Before → After)	Statements (Before → After)
`src/log-directory-setup.ts`	96.2% → 100.0% (+3.78%)	96.3% → 100.0% (+3.71%)

Coverage comparison generated by scripts/ci/compare-coverage.ts

github-actions · 2026-08-23T16:35:06Z

❌ Smoke Gemini reports failed. Facets need polishing...

💎 Faceted by Smoke Gemini

github-actions · 2026-08-23T16:35:07Z

✨ The prophecy is fulfilled... Smoke Codex has completed its mystical journey. The stars align. 🌟

Warning

Firewall blocked 3 domains

The following domains were blocked by the firewall during workflow execution:

msfeed2.pkgs.visualstudio.com
msfeed25.pkgs.visualstudio.com
registry.npmjs.org

To allow these domains, add them to the network.allowed list in your workflow frontmatter:

network:
  allowed:
    - defaults
    - "msfeed2.pkgs.visualstudio.com"
    - "msfeed25.pkgs.visualstudio.com"
    - "registry.npmjs.org"

See Network Configuration for more information.

🔮 The oracle has spoken through Smoke Codex

github-actions · 2026-08-23T16:35:07Z

📡 Smoke OTel Tracing completed. All tracing scenarios validated. ✅

📡 OTel tracing validated by Smoke OTel Tracing

github-actions · 2026-08-23T16:35:07Z

📰 VERDICT: Smoke Copilot has concluded. All systems operational. This is a developing story. 🎤

📰 BREAKING: Report filed by Smoke Copilot

github-actions · 2026-08-23T16:35:08Z

📰 VERDICT: Smoke Docker Sbx has concluded. All systems operational. This is a developing story. 🎤

📰 BREAKING: Report filed by Smoke Docker Sbx

github-actions · 2026-08-23T16:35:08Z

✅ Smoke Copilot BYOK completed. Copilot BYOK mode operational. 🔓

🔑 BYOK report filed by Smoke Copilot BYOK

github-actions · 2026-08-23T16:35:08Z

🔌 Smoke Services — All services reachable! ✅

🔌 Service connectivity validated by Smoke Services

github-actions · 2026-08-23T16:35:09Z

✅ Smoke Claude passed

Generated by Smoke Claude for #7659

github-actions · 2026-08-23T16:35:10Z

✅ Smoke Copilot BYOK AOAI (api-key) completed. Copilot AOAI BYOK (api-key) mode operational. 🔓

🔑 BYOK (AOAI api-key) report filed by Smoke Copilot BYOK AOAI (api-key)

github-actions · 2026-08-23T16:35:14Z

🛡️ Smoke Copilot Network Isolation confirmed the egress allowlist is enforced. ✅

Warning

Firewall blocked 1 domain

The following domain was blocked by the firewall during workflow execution:

example.com

To allow these domains, add them to the network.allowed list in your workflow frontmatter:

network:
  allowed:
    - defaults
    - "example.com"

See Network Configuration for more information.

🛡️ Egress verdict from Smoke Copilot Network Isolation

github-actions · 2026-08-23T16:35:14Z

✅ Build Test Suite completed successfully!

Generated by Build Test Suite for #7659

github-actions · 2026-08-23T16:35:16Z

✅ Smoke Copilot BYOK AOAI (Entra) completed. Copilot AOAI BYOK (Entra) mode operational. 🔓

🪪 BYOK (AOAI Entra) report filed by Smoke Copilot BYOK AOAI (Entra)

github-actions · 2026-08-23T16:38:15Z

Smoke Test: Claude Engine Validation

Check	Status
API	✅ PASS
GitHub CLI	✅ PASS
File	✅ PASS

Overall result: PASS

Generated by Smoke Claude for #7659 · haiku45 · 32.7 AIC · ⊞ 4.5K · ◷
_{Add label ready-for-aw to run again}

github-actions · 2026-08-23T16:38:18Z

Smoke Test: Copilot Engine

✅ GitHub MCP: PR chore(workflows): upgrade gh-aw prerelease #7655 "chore(workflows): upgrade gh-aw prerelease"
✅ GitHub.com connectivity (HTTP 200)
✅ File write/read test

Overall: PASS

cc @lpcox

📰 BREAKING: Report filed by Smoke Copilot
_{Add label ready-for-aw to run again}

github-actions · 2026-08-23T16:38:21Z

EGRESS_RESULT allow=pass deny=pass

✅ Allowed domain (api.github.com) reachable — HTTP 200
✅ Blocked domain (example.com) denied — 403 CONNECT tunnel failed

Overall: PASS ✅

@lpcox network isolation egress enforcement working as expected.

Warning

Firewall blocked 1 domain

The following domain was blocked by the firewall during workflow execution:

example.com

To allow these domains, add them to the network.allowed list in your workflow frontmatter:

network:
  allowed:
    - defaults
    - "example.com"

See Network Configuration for more information.

🛡️ Egress verdict from Smoke Copilot Network Isolation
_{Add label ready-for-aw to run again}

github-actions · 2026-08-23T16:38:26Z

✅ Direct BYOK Smoke Test PASSED

Test Results:

✅ GitHub MCP connectivity (list_pull_requests)
✅ GitHub.com connectivity (HTTP 200)
✅ File write/read test
✅ BYOK inference working (direct mode via api-proxy → api.githubcopilot.com)

Mode: Direct BYOK (COPILOT_PROVIDER_API_KEY) with api-proxy sidecar injection

Status: PASS

🔑 BYOK report filed by Smoke Copilot BYOK
_{Add label ready-for-aw to run again}

github-actions · 2026-08-23T16:38:52Z

Smoke Test: Services Connectivity

Redis PING: ❌ (Temporary failure in name resolution)
pg_isready: ❌ (no response)
PostgreSQL SELECT 1: ❌ (could not translate host name)

Overall: FAIL — host.docker.internal did not resolve in the AWF sandbox.

🔌 Service connectivity validated by Smoke Services
_{Add label ready-for-aw to run again}

github-actions · 2026-08-23T16:38:56Z

Docker Sbx Smoke Test

✅ GitHub MCP connectivity (PR chore(workflows): upgrade gh-aw prerelease #7655, chore: update model-to-API mapping (2026-08-23) #7651 confirmed)
✅ GitHub.com connectivity (HTTP 200)
✅ File write/read test

Overall: PASS

cc @lpcox

📰 BREAKING: Report filed by Smoke Docker Sbx
_{Add label ready-for-aw to run again}

github-actions · 2026-08-23T16:39:19Z

@lpcox @Copilot

Smoke test results for Strip stale raw-network capabilities from agent images:

MCP API: ✅
GitHub.com connectivity: ✅
File I/O: ✅
Direct BYOK mode: ✅

Running in direct BYOK mode (COPILOT_PROVIDER_API_KEY + COPILOT_PROVIDER_BASE_URL) via api-proxy → Azure OpenAI (Foundry, o4-mini-aw)

Overall: PASS

🔑 BYOK (AOAI api-key) report filed by Smoke Copilot BYOK AOAI (api-key)
_{Add label ready-for-aw to run again}

github-actions · 2026-08-23T16:39:42Z

Chroot Version Comparison

Runtime	Host Version	Chroot Version	Match?
Python	3.12.14	3.12.14	✅ YES
Node.js	v24.19.0	v22.23.2	❌ NO
Go	go1.22.12	go1.22.12	✅ YES

Not all tests passed — Node.js version differs between host and chroot environment. smoke-chroot label was not added.

Tested by Smoke Chroot
_{Add label ready-for-aw to run again}

github-actions · 2026-08-23T16:39:49Z

Smoke test: FAIL

PR titles:

fix: fail closed stripping raw network caps
feat(workflows): use Cloud Hypervisor for maintenance (Run documentation and mapping workflows on Cloud Hypervisor #7643)
GitHub PR review/query: ❌
Playwright title contains GitHub: ✅
File write + cat verify: ✅
Discussion interaction: ❌
npm ci + build: ✅

Overall status: FAIL

Warning

Firewall blocked 3 domains

The following domains were blocked by the firewall during workflow execution:

msfeed2.pkgs.visualstudio.com
msfeed25.pkgs.visualstudio.com
registry.npmjs.org

To allow these domains, add them to the network.allowed list in your workflow frontmatter:

network:
  allowed:
    - defaults
    - "msfeed2.pkgs.visualstudio.com"
    - "msfeed25.pkgs.visualstudio.com"
    - "registry.npmjs.org"

See Network Configuration for more information.

🔮 The oracle has spoken through Smoke Codex
_{Add label ready-for-aw to run again}

github-actions · 2026-08-23T16:40:07Z

🏗️ Build Test Suite Results

Ecosystem	Project	Build/Install	Tests	Status
Bun	elysia	✅	1/1 passed	✅ PASS
Bun	hono	✅	1/1 passed	✅ PASS
C++	fmt	✅	N/A	✅ PASS
C++	json	✅	N/A	✅ PASS
Deno	oak	N/A	1/1 passed	✅ PASS
Deno	std	N/A	1/1 passed	✅ PASS
.NET	hello-world	✅	N/A	✅ PASS
.NET	json-parse	✅	N/A	✅ PASS
Go	color	✅	1/1 passed	✅ PASS
Go	env	✅	1/1 passed	✅ PASS
Go	uuid	✅	1/1 passed	✅ PASS
Java	gson	✅	1/1 passed	✅ PASS
Java	caffeine	✅	1/1 passed	✅ PASS
Node.js	clsx	✅	passed	✅ PASS
Node.js	execa	✅	passed	✅ PASS
Node.js	p-limit	✅	passed	✅ PASS
Rust	fd	✅	1/1 passed	✅ PASS
Rust	zoxide	✅	1/1 passed	✅ PASS

Overall: 8/8 ecosystems passed — PASS

Notes:

Java Maven builds initially failed with LocalRepositoryNotAccessibleException because ~/.m2 is root-owned in this environment; resolved by pointing <localRepository> in settings.xml to a writable path (/tmp/gh-aw/agent/m2repo) alongside the required proxy config. No firewall-related issue.
All other ecosystems built, installed dependencies, and ran tests successfully through the AWF proxy with no network/firewall errors.

Generated by Build Test Suite for #7659 · auto · 43.9 AIC · ⊞ 12K · ◷
_{Add label ready-for-aw to run again}

github-actions · 2026-08-23T16:40:28Z

OTel Tracing Smoke Test Results

✅ Scenario 1 (Module Loading): otel.js loaded successfully, isEnabled: true, exports include startRequestSpan, setTokenAttributes, setBudgetAttributes, endSpan, endSpanError, shutdown, isEnabled.
✅ Scenario 2 (Test Suite): 3 suites / 68 tests passed (otel.test.js, otel-fanout.test.js, otel-workload-identity.test.js).
✅ Scenario 3 (Env Var Forwarding): env-passthrough.ts forwards GITHUB_AW_OTEL_TRACE_ID/GITHUB_AW_OTEL_PARENT_SPAN_ID to the agent; api-proxy-env-config.ts forwards GH_AW_OTLP_ENDPOINTS, OTEL_EXPORTER_OTLP_ENDPOINT, and the trace context to api-proxy.
✅ Scenario 4 (Token Tracker Integration): token-tracker-http.js contains the onUsage callback hook point.
✅ Scenario 5 (OTEL Diagnostics): No otel.jsonl span file was produced this run (no live LLM traffic through api-proxy to generate spans), but token-usage.jsonl (10 records) confirms the proxy ran without errors — graceful degradation confirmed, no failures.

All scenarios pass or are expected-pending. No regressions detected.

📡 OTel tracing validated by Smoke OTel Tracing
_{Add label ready-for-aw to run again}

github-actions · 2026-08-23T16:41:19Z

Strip stale raw-network capabilities from agent images

MCP Connectivity: ✅
GitHub.com Connectivity: ✅
File Write/Read Test: ✅
BYOK Inference Test: ✅

Running in direct BYOK mode (AWF_AUTH_TYPE=github-oidc + AWF_AUTH_AZURE_* + COPILOT_PROVIDER_BASE_URL) via api-proxy → Azure OpenAI (Foundry, o4-mini-aw) authenticated via Microsoft Entra

Overall: PASS

cc @lpcox @Copilot

🪪 BYOK (AOAI Entra) report filed by Smoke Copilot BYOK AOAI (Entra)
_{Add label ready-for-aw to run again}

Initial plan

a149350

Copilot AI assigned Copilot and lpcox Aug 23, 2026

Copilot started work on behalf of lpcox August 23, 2026 15:32 View session

Copilot AI linked an issue Aug 23, 2026 that may be closed by this pull request

Security finding #7658

Closed

fix: strip raw network file capabilities

1a9aa1c

Copilot AI changed the title ~~[WIP] Fix security finding for issue #7658~~ Strip stale raw-network capabilities from agent images Aug 23, 2026

Copilot finished work on behalf of lpcox August 23, 2026 15:40

Copilot AI requested a review from lpcox August 23, 2026 15:40

lpcox marked this pull request as ready for review August 23, 2026 15:42

Copilot AI balanced review requested due to automatic review settings August 23, 2026 15:42

Copilot started reviewing on behalf of lpcox August 23, 2026 15:43 View session

Copilot AI reviewed Aug 23, 2026

View reviewed changes

Copilot started work on behalf of lpcox August 23, 2026 16:13 View session

fix: fail closed stripping raw network caps

84bf722

Copilot finished work on behalf of lpcox August 23, 2026 16:18

lpcox added the ready-for-aw label Aug 23, 2026

lpcox deployed to aoai-model August 23, 2026 16:35 — with GitHub Actions Active

github-actions Bot added the smoke-claude label Aug 23, 2026

github-actions Bot added smoke-copilot smoke-copilot-network-isolation Copilot network-isolation egress smoke test labels Aug 23, 2026

github-actions Bot added the smoke-copilot-byok label Aug 23, 2026

github-actions Bot added the smoke-docker-sbx label Aug 23, 2026

github-actions Bot added the smoke-copilot-byok-aoai-apikey label Aug 23, 2026

github-actions Bot added the build-test label Aug 23, 2026

lpcox deployed to aoai-model August 23, 2026 16:41 — with GitHub Actions Active

github-actions Bot added the smoke-copilot-byok-aoai-entra label Aug 23, 2026

lpcox deployed to aoai-model August 23, 2026 16:41 — with GitHub Actions Active

lpcox merged commit 883eba7 into main Aug 23, 2026
158 of 160 checks passed

lpcox deleted the copilot/github-issue-7658-fix-security-finding branch August 23, 2026 17:06

This was referenced Aug 23, 2026

feat: add Cloud Hypervisor filesystem write planner #7660

Merged

feat: stage host mount trees for virtiofsd exports #7661

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Pull request overview

Review details

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✅ Coverage Check Passed

Overall Coverage

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Smoke Test: Claude Engine Validation

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✅ Direct BYOK Smoke Test PASSED

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Smoke Test: Services Connectivity

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Chroot Version Comparison

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🏗️ Build Test Suite Results

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