🛡️ Sentinel: [CRITICAL] readline 입력값 정규식 검증 강화 및 DoS 취약점 해결

[seonghobae]

🛡️ Sentinel: [CRITICAL] readline 입력값 정규식 검증 강화 및 DoS 취약점 해결

🚨 Severity: CRITICAL
💡 Vulnerability: 사용자가 콘솔에 정수를 입력해야 하는 readline 환경에서 정규식이 ^[0-9]+$로 느슨하게 설정되어 임의의 거대한 숫자를 넣었을 때 as.integer() 변환 후 NA로 변경되어 후속 if문 체크에서 충돌이 일어나는 DoS(Denial of Service) 가능성 및 강제 종료 버그가 존재했습니다.
🎯 Impact: 인터랙티브 사용자 콘솔에서 실수 또는 고의로 숫자를 비정상적으로 길게 입력할 경우, 툴이 NA 강제 변환에 의한 에러(argument is of length zero)로 비정상 종료되어 작업 내역이 손실되거나 서비스를 사용할 수 없게 됩니다.
🔧 Fix: 사용자의 입력은 (1: Yes 2: No) 처럼 특정 메뉴 항목 내에서만 허용되므로, 정규식을 ^[12]$와 같은 엄격한 Exact-Match 방식으로 수정하여 NA 캐스팅 충돌과 예기치 못한 우회 공격 벡터를 차단했습니다.
✅ Verification: mockery 라이브러리를 사용해 잘못된 입력을 고의로 여러 번 주입하는 testthat 테스트를 작성하여, 반복 횟수를 초과했을 때 시스템이 NA 타입 에러로 무너지는 대신 정상적으로 의도한 종료 조건(Too many invalid common item confirmation attempts)으로 빠져나가는지 검증했습니다.

추가로 향후 Sentinel 역할에서 유사한 취약점 예방을 위해 .jules/sentinel.md 저널에 지식을 기록했습니다.

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PR created automatically by Jules for task 4689478624443796321 started by @seonghobae

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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 c301cfa9f4fde8193a1448285e079b75c316a729.

• Head SHA: c301cfa9f4fde8193a1448285e079b75c316a729

• Workflow run: 29561665594

• 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 (2 files)"]
  S1 --> I1["repository behavior"]
  I1 --> R1["Review risk: Changed file (2 files)"]
  R1 --> V1["required checks"]
  Evidence --> S2["Test: test-autoFIPC.R"]
  S2 --> I2["regression suite"]
  I2 --> R2["Review risk: Test: test-autoFIPC.R"]
  R2 --> V2["targeted test run"]

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[opencode-agent]

OpenCode Review Overview

• Head SHA: c301cfa9f4fde8193a1448285e079b75c316a729
• Workflow run: 29561665594
• 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 c301cfa9f4fde8193a1448285e079b75c316a729.

• Head SHA: c301cfa9f4fde8193a1448285e079b75c316a729

• Workflow run: 29561665594

• 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 (2 files)"]
  S1 --> I1["repository behavior"]
  I1 --> R1["Review risk: Changed file (2 files)"]
  R1 --> V1["required checks"]
  Evidence --> S2["Test: test-autoFIPC.R"]
  S2 --> I2["regression suite"]
  I2 --> R2["Review risk: Test: test-autoFIPC.R"]
  R2 --> V2["targeted test run"]

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