🛡️ Sentinel: [CRITICAL] Fix SSRF Bypass via HTTP Redirects in urlopen

[seonghobae]

🚨 Severity: CRITICAL
💡 Vulnerability: SSRF Bypass via HTTP Redirects (urllib.request.urlopen implicitly follows redirects without re-validating the target URL against safety rules).
🎯 Impact: An attacker could provide a URL that passes initial SSRF checks but redirects internally to a private/loopback IP address, effectively bypassing internal network protections.
🔧 Fix: Intercepted all redirects by subclassing urllib.request.HTTPRedirectHandler and enforcing _is_safe_url validation on the newurl during redirect_request. Replaced generic urlopen with a custom build_opener applying this handler.
✅ Verification: Updated mock implementations in unit tests to correctly mock build_opener instead of urlopen. All test suites successfully pass. Added a Sentinel learning journal entry to .jules/sentinel.md.

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PR created automatically by Jules for task 2031976806750961095 started by @seonghobae

[google-labs-jules]

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[opencode-agent]

Pull request overview

OpenCode cannot approve yet because required coverage evidence did not pass.

Review outcome

1. HIGH .github/workflows/opencode-review.yml:1 - Coverage evidence did not prove required test/docstring evidence

• Problem: The required coverage-evidence job result was failure, so OpenCode cannot establish approval sufficiency for this head.

• Root cause: Automated approval is only valid when the same-head coverage-evidence job proves supported repository test suites passed and configured docstring gates passed or were advisory, or reports not applicable because no supported source files or package manifests exist. Missing, failed, skipped, unavailable, or unsupported-tooling test evidence is a blocker.

• Fix: Install or configure the repository test/docstring evidence tooling when source files or package manifests exist, rerun the current-head coverage-evidence job, and approve only after it reports success with required evidence or explicit no-source not-applicable evidence.

• Regression test: Keep the approval branch checking needs.coverage-evidence.result == success before posting APPROVE, and publish REQUEST_CHANGES when coverage-evidence blocker states such as cancelled, skipped, failed, unsupported-tooling, or below-100 evidence are present.

• Result: REQUEST_CHANGES

• Reason: coverage-evidence result was failure, so required test/docstring evidence was not proven for current head 715553d64397270d5c0593064801938ff853c46e.

• Head SHA: 715553d64397270d5c0593064801938ff853c46e

• Workflow run: 29391735844

• Workflow attempt: 1

Coverage evidence

Coverage Decision

• Result: FAIL
• Test evidence: not proven passing
• Docstring evidence: not proven passing when configured
• Failure count: 1

Changed-File Evidence Map

flowchart LR
  PR["PR changed files"] --> Evidence["OpenCode bounded evidence"]
  Evidence --> S1["Changed file (3 files)"]
  S1 --> I1["repository behavior"]
  I1 --> R1["Review risk: Changed file (3 files)"]
  R1 --> V1["required checks"]
  Evidence --> S2["Test: test_controlplane.py"]
  S2 --> I2["regression suite"]
  I2 --> R2["Review risk: Test: test_controlplane.py"]
  R2 --> V2["targeted test run"]

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[opencode-agent]

OpenCode Review Overview

• Head SHA: 4706a14ff95cfebd810bb2e2843abf758dd75031
• Workflow run: 29396551681
• Workflow attempt: 1
• Gate result: REQUEST_CHANGES (approval step)

Pull request overview

OpenCode cannot approve yet because required coverage evidence did not pass.

Review outcome

1. HIGH .github/workflows/opencode-review.yml:1 - Coverage evidence did not prove required test/docstring evidence

• Problem: The required coverage-evidence job result was failure, so OpenCode cannot establish approval sufficiency for this head.

• Root cause: Automated approval is only valid when the same-head coverage-evidence job proves supported repository test suites passed and configured docstring gates passed or were advisory, or reports not applicable because no supported source files or package manifests exist. Missing, failed, skipped, unavailable, or unsupported-tooling test evidence is a blocker.

• Fix: Install or configure the repository test/docstring evidence tooling when source files or package manifests exist, rerun the current-head coverage-evidence job, and approve only after it reports success with required evidence or explicit no-source not-applicable evidence.

• Regression test: Keep the approval branch checking needs.coverage-evidence.result == success before posting APPROVE, and publish REQUEST_CHANGES when coverage-evidence blocker states such as cancelled, skipped, failed, unsupported-tooling, or below-100 evidence are present.

• Result: REQUEST_CHANGES

• Reason: coverage-evidence result was failure, so required test/docstring evidence was not proven for current head 4706a14ff95cfebd810bb2e2843abf758dd75031.

• Head SHA: 4706a14ff95cfebd810bb2e2843abf758dd75031

• Workflow run: 29396551681

• Workflow attempt: 1

Coverage evidence

Coverage Decision

• Result: FAIL
• Test evidence: not proven passing
• Docstring evidence: not proven passing when configured
• Failure count: 1

Changed-File Evidence Map

flowchart LR
  PR["PR changed files"] --> Evidence["OpenCode bounded evidence"]
  Evidence --> S1["Changed file (4 files)"]
  S1 --> I1["repository behavior"]
  I1 --> R1["Review risk: Changed file (4 files)"]
  R1 --> V1["required checks"]
  Evidence --> S2["Test: test_controlplane.py"]
  S2 --> I2["regression suite"]
  I2 --> R2["Review risk: Test: test_controlplane.py"]
  R2 --> V2["targeted test run"]

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[opencode-agent]

Pull request overview

OpenCode cannot approve yet because required coverage evidence did not pass.

Review outcome

1. HIGH .github/workflows/opencode-review.yml:1 - Coverage evidence did not prove required test/docstring evidence

• Problem: The required coverage-evidence job result was failure, so OpenCode cannot establish approval sufficiency for this head.

• Root cause: Automated approval is only valid when the same-head coverage-evidence job proves supported repository test suites passed and configured docstring gates passed or were advisory, or reports not applicable because no supported source files or package manifests exist. Missing, failed, skipped, unavailable, or unsupported-tooling test evidence is a blocker.

• Fix: Install or configure the repository test/docstring evidence tooling when source files or package manifests exist, rerun the current-head coverage-evidence job, and approve only after it reports success with required evidence or explicit no-source not-applicable evidence.

• Regression test: Keep the approval branch checking needs.coverage-evidence.result == success before posting APPROVE, and publish REQUEST_CHANGES when coverage-evidence blocker states such as cancelled, skipped, failed, unsupported-tooling, or below-100 evidence are present.

• Result: REQUEST_CHANGES

• Reason: coverage-evidence result was failure, so required test/docstring evidence was not proven for current head 4706a14ff95cfebd810bb2e2843abf758dd75031.

• Head SHA: 4706a14ff95cfebd810bb2e2843abf758dd75031

• Workflow run: 29396551681

• Workflow attempt: 1

Coverage evidence

Coverage Decision

• Result: FAIL
• Test evidence: not proven passing
• Docstring evidence: not proven passing when configured
• Failure count: 1

Changed-File Evidence Map

flowchart LR
  PR["PR changed files"] --> Evidence["OpenCode bounded evidence"]
  Evidence --> S1["Changed file (4 files)"]
  S1 --> I1["repository behavior"]
  I1 --> R1["Review risk: Changed file (4 files)"]
  R1 --> V1["required checks"]
  Evidence --> S2["Test: test_controlplane.py"]
  S2 --> I2["regression suite"]
  I2 --> R2["Review risk: Test: test_controlplane.py"]
  R2 --> V2["targeted test run"]

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