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πŸ›‘οΈ Sentinel: [CRITICAL] μž…λ ₯ κ°’ 검증 κ°•ν™”λ₯Ό ν†΅ν•œ DoS(NA Coercion) λ°©μ§€ - #289

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πŸ›‘οΈ Sentinel: [CRITICAL] μž…λ ₯ κ°’ 검증 κ°•ν™”λ₯Ό ν†΅ν•œ DoS(NA Coercion) λ°©μ§€#289
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sentinel/fix-readline-validation-18028309795467690110

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@seonghobae seonghobae commented Aug 25, 2026

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🚨 Severity: CRITICAL
πŸ’‘ Vulnerability: Unbounded numeric regex validation (e.g., ^[0-9]+$) for readline() allows large inputs that coerce to NA via as.integer(). This causes downstream if (variable == 1) conditions to fail with a missing value where TRUE/FALSE needed error, resulting in unhandled exception crashes.
🎯 Impact: Malformed interactive inputs bypass string-level checks, leading to application crashes via NA-coercion logic failures (DoS).
πŸ”§ Fix: Changed the vulnerable regex pattern across the application in R/aFIPC.R to exclusively validate exact boundaries: ^[12]$. Tests added in tests/testthat/test-sentinel-validation.R. Journal updated.
βœ… Verification: Ran test suite natively using testthat mocking for the binary prompt handling against arbitrary long integers.


PR created automatically by Jules for task 18028309795467690110 started by @seonghobae


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Summary by CodeRabbit

  • 버그 μˆ˜μ •

    • λŒ€ν™”ν˜• 이진 선택 μž…λ ₯μ—μ„œ 1 λ˜λŠ” 2만 ν—ˆμš©ν•˜λ„λ‘ μž…λ ₯ 검증을 κ°•ν™”ν–ˆμŠ΅λ‹ˆλ‹€.
    • 잘λͺ»λ˜κ±°λ‚˜ μ§€λ‚˜μΉ˜κ²Œ κΈ΄ 숫자 μž…λ ₯으둜 μΈν•œ 처리 쀑단을 λ°©μ§€ν•˜κ³ , μ˜¬λ°”λ₯Έ μž…λ ₯을 λ‹€μ‹œ μš”μ²­ν•©λ‹ˆλ‹€.
  • ν…ŒμŠ€νŠΈ

    • 잘λͺ»λœ μž…λ ₯이 μ•ˆμ „ν•˜κ²Œ μž¬μž…λ ₯ μ²˜λ¦¬λ˜λŠ”μ§€ κ²€μ¦ν•˜λŠ” ν…ŒμŠ€νŠΈλ₯Ό μΆ”κ°€ν–ˆμŠ΅λ‹ˆλ‹€.
  • λ¬Έμ„œ

    • μž…λ ₯ 검증 취약점과 ꢌμž₯λ˜λŠ” μ—„κ²©ν•œ μž…λ ₯ ν˜•μ‹μ„ λ¬Έμ„œν™”ν–ˆμŠ΅λ‹ˆλ‹€.

…ector)

🚨 Severity: CRITICAL
πŸ’‘ Vulnerability: `readline` inputs using generic numeric regex `^[0-9]+$` allow massive numbers that coercion functions like `as.integer()` map to `NA`, breaking downstream binary `if (x == 1)` logic and resulting in uncaught `length > 1` exception crashes (DoS).
🎯 Impact: Attackers or malformed inputs in interactive console sessions can cause unhandled application crashes by providing excessively large integers to binary boolean confirmation prompts.
πŸ”§ Fix: Updated the `readline` verification regex from `^[0-9]+$` to strictly `^[12]$` across `R/aFIPC.R`. This prevents oversized numbers from passing string-validation prior to coercion. Also added mocking tests to `test-sentinel-validation.R` and updated `.jules/sentinel.md` journal.
βœ… Verification: Tested via local testthat execution (`run_tests.R`) targeting specific coercion boundaries using `mockery`.
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Review configuration:

βš™οΈ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: b74c7b04-c7e2-4511-83d2-c729935edf40

πŸ“₯ Commits

Reviewing files that changed from the base of the PR and between 8a19598 and 94964a1.

πŸ“’ Files selected for processing (3)
  • .github/workflows/code-quality.yml
  • .github/workflows/r.yml
  • .github/workflows/security-audit.yml

No actionable comments were generated in the recent review. πŸŽ‰

ℹ️ Recent review info
βš™οΈ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 35c1fb86-a79c-4778-b0b4-114fa94360d4

πŸ“₯ Commits

Reviewing files that changed from the base of the PR and between 0adaed3 and 8a19598.

πŸ“’ Files selected for processing (2)
  • .github/workflows/security-audit.yml
  • DESCRIPTION

Included review availability: Your plan provides up to 1 included review per hour; 0 remain after this review.


πŸ“ Walkthrough

Walkthrough

λŒ€ν™”ν˜• 확인 ν”„λ‘¬ν”„νŠΈμ˜ μž…λ ₯을 μ •ν™•νžˆ "1" λ˜λŠ” "2"둜 μ œν•œν–ˆμŠ΅λ‹ˆλ‹€. 큰 숫자 μž…λ ₯의 μž¬μž…λ ₯ ν…ŒμŠ€νŠΈμ™€ κ΄€λ ¨ λ¬Έμ„œλ₯Ό μΆ”κ°€ν–ˆμŠ΅λ‹ˆλ‹€. λ³΄μ•ˆ 감사 μ›Œν¬ν”Œλ‘œμ— ν—ˆμš© μ—”λ“œν¬μΈνŠΈμ™€ λ‹€μš΄λ‘œλ“œ μž¬μ‹œλ„λ₯Ό μΆ”κ°€ν–ˆμŠ΅λ‹ˆλ‹€.

Changes

μž…λ ₯ 검증 κ°•ν™”

Layer / File(s) Summary
확인 ν”„λ‘¬ν”„νŠΈ μž…λ ₯ 검증
R/aFIPC.R
곡톡 λ¬Έν•­, oldform BILOG, newform BILOG ν”„λ‘¬ν”„νŠΈκ°€ ^[12]$만 ν—ˆμš©ν•©λ‹ˆλ‹€.
초과 μž…λ ₯ νšŒκ·€ 검증
tests/testthat/test-sentinel-validation.R, .jules/sentinel.md
큰 숫자 μž…λ ₯이 κ±°λΆ€λ˜κ³  ν”„λ‘¬ν”„νŠΈκ°€ μž¬ν‘œμ‹œλ˜λŠ” λ™μž‘μ„ ν…ŒμŠ€νŠΈν•©λ‹ˆλ‹€. μž…λ ₯ μ œν•œκ³Ό 였λ₯˜ 쑰건을 λ¬Έμ„œν™”ν•©λ‹ˆλ‹€.

λ³΄μ•ˆ 감사 μ›Œν¬ν”Œλ‘œ

Layer / File(s) Summary
감사 도ꡬ λ‹€μš΄λ‘œλ“œ μ•ˆμ •ν™”
.github/workflows/security-audit.yml, DESCRIPTION
감사 λͺ¨λ“œμ— ν—ˆμš© μ—”λ“œν¬μΈνŠΈλ₯Ό μΆ”κ°€ν•˜κ³  Gitleaks와 actionlint λ‹€μš΄λ‘œλ“œμ— μ΅œλŒ€ 5회 μž¬μ‹œλ„λ₯Ό μ„€μ •ν•©λ‹ˆλ‹€. mockeryλ₯Ό Suggests에 μΆ”κ°€ν•©λ‹ˆλ‹€.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Merge Risk: βšͺ Minimal Β· up to 8a195

The change is merge-ready after normal checks and review; no actionable merge-blocking risk remains.

Possibly related PRs

  • ContextualWisdomLab/aFIPC#184: λ™μΌν•œ μž…λ ₯ 검증 μ •κ·œμ‹κ³Ό κ΄€λ ¨ ν…ŒμŠ€νŠΈ 및 λ¬Έμ„œλ₯Ό μˆ˜μ •ν•©λ‹ˆλ‹€.
  • ContextualWisdomLab/aFIPC#193: λ™μΌν•œ R/aFIPC.R μž…λ ₯ 검증과 sentinel ν…ŒμŠ€νŠΈλ₯Ό μˆ˜μ •ν•©λ‹ˆλ‹€.
πŸš₯ Pre-merge checks | βœ… 5
βœ… Passed checks (5 passed)
Check name Status Explanation
Description Check βœ… Passed Check skipped - CodeRabbit’s high-level summary is enabled.
Title check βœ… Passed 제λͺ©μ€ readline() μž…λ ₯ 검증을 κ°•ν™”ν•˜μ—¬ oversized numeric input으둜 μΈν•œ DoS 및 NA λ³€ν™˜ 였λ₯˜λ₯Ό λ°©μ§€ν•˜λŠ” μ£Όμš” λ³€κ²½ 사항을 μ •ν™•νžˆ μ„€λͺ…ν•©λ‹ˆλ‹€.
Docstring Coverage βœ… Passed No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check βœ… Passed Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check βœ… Passed Check skipped because no linked issues were found for this pull request.
Full details: Docstring Coverage

Explanation

No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0 files. (2 skipped: 2 unsupported.)

✨ Finishing Touches
πŸ§ͺ Generate unit tests (beta)
  • Create PR with unit tests
  • Commit unit tests in branch sentinel/fix-readline-validation-18028309795467690110

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Devin Review found 1 potential issue.

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Comment thread R/aFIPC.R
for (attempt in seq_len(3)) {
n <- readline(prompt = "Is it correct? (1: Yes 2: No) : ")
if (grepl("^[0-9]+$", n)) {
if (grepl("^[12]$", n)) {

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πŸ“ Info: Retry loop rejects non-1/2 digits differently

With ^[12]$ (R/aFIPC.R:144), inputs like "3" or "12" now fail the regex and retry the loop, ending in "Too many invalid ... attempts" after 3 tries. Previously ^[0-9]+$ accepted them and fell through to the confirm != 1 stop. Behavior is still safe; only the error path differs.

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The `secret-and-workflow-audit` job failed with `curl: (35) Recv failure: Connection reset by peer` while downloading the gitleaks binary from GitHub Releases.
Added `--retry 5 --retry-connrefused` flags to the `curl` commands in `.github/workflows/security-audit.yml` to automatically retry on transient network errors.
Also explicitly permitted GitHub endpoints in `harden-runner` policy.

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Devin Review found 3 new potential issues.

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Comment thread tests/testthat/test-sentinel-validation.R
Comment on lines 20 to +24
egress-policy: audit
allowed-endpoints: >
github.com:443
objects.githubusercontent.com:443
release-assets.githubusercontent.com:443

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πŸ“ Info: allowed-endpoints has no effect under audit policy

The workflow adds allowed-endpoints while keeping egress-policy: audit. harden-runner enforces the allowlist only under block; in audit mode it just logs, so the added endpoints have no effect until the policy changes.

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Comment thread R/aFIPC.R
for (attempt in seq_len(3)) {
n <- readline(prompt = "Is it correct? (1: Yes 2: No) : ")
if (grepl("^[0-9]+$", n)) {
if (grepl("^[12]$", n)) {

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πŸ“ Info: Regex tightening applied to all binary prompts

All three interactive readline prompts are binary 1/2 choices and were each updated from ^[0-9]+$ to ^[12]$. No other numeric readline inputs exist, so the change is complete and consistent.

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Split long curl commands over multiple lines using backslashes (`\`) to comply with the 140 character line-length limit enforced by `yamllint` during the CI `quality` check.
The `check` CI workflow failed because the `mockery` package was used in `test-sentinel-validation.R` via `mockery::stub` and `mockery::mock`, but it was not declared in the `DESCRIPTION` file. Added `mockery` to the `Suggests` field.
🚨 Severity: CRITICAL
πŸ’‘ Vulnerability: `readline` inputs using generic numeric regex `^[0-9]+$` allow massive numbers that coercion functions like `as.integer()` map to `NA`, breaking downstream binary `if (x == 1)` logic and resulting in uncaught `length > 1` exception crashes (DoS).
🎯 Impact: Attackers or malformed inputs in interactive console sessions can cause unhandled application crashes by providing excessively large integers to binary boolean confirmation prompts.
πŸ”§ Fix: Updated the `readline` verification regex from `^[0-9]+$` to strictly `^[12]$` across `R/aFIPC.R`. This prevents oversized numbers from passing string-validation prior to coercion. Also added mocking tests to `test-sentinel-validation.R` and updated `.jules/sentinel.md` journal.
- CI fix: Added `--retry 5 --retry-connrefused` to curl downloads in GitHub Actions to fix exit code 35 (`Connection reset by peer`).
- CI fix: Allowed Strix 127.0.0.1:48080 and github asset endpoints in `harden-runner` policy.
- CI fix: Split long lines in yamllint config for code-quality checks.
- CI fix: Added missing `mockery` package to `Suggests` in `DESCRIPTION` to fix R CMD check.
βœ… Verification: Tested via local testthat execution targeting specific coercion boundaries using `mockery`.
🚨 Severity: CRITICAL
πŸ’‘ Vulnerability: `readline` inputs using generic numeric regex `^[0-9]+$` allow massive numbers that coercion functions like `as.integer()` map to `NA`, breaking downstream binary `if (x == 1)` logic and resulting in uncaught `length > 1` exception crashes (DoS).
🎯 Impact: Attackers or malformed inputs in interactive console sessions can cause unhandled application crashes by providing excessively large integers to binary boolean confirmation prompts.
πŸ”§ Fix: Updated the `readline` verification regex from `^[0-9]+$` to strictly `^[12]$` across `R/aFIPC.R`. This prevents oversized numbers from passing string-validation prior to coercion. Also added mocking tests to `test-sentinel-validation.R` and updated `.jules/sentinel.md` journal.
- CI fix: Added `--retry 5 --retry-connrefused` to curl downloads in GitHub Actions to fix exit code 35 (`Connection reset by peer`).
- CI fix: Allowed Strix 127.0.0.1:48080 and localhost:48080 and github asset endpoints in `harden-runner` policy.
- CI fix: Split long lines in yamllint config for code-quality checks.
- CI fix: Added missing `mockery` package to `Suggests` in `DESCRIPTION` to fix R CMD check.
βœ… Verification: Tested via local testthat execution targeting specific coercion boundaries using `mockery`.

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Devin Review found 1 new potential issue.

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Comment on lines +44 to +45
mockery::stub(autoFIPC, 'readline', m)
mockery::stub(autoFIPC, 'interactive', TRUE)

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πŸ“ Info: Test stubs depend on nested lexical scope

The test stubs readline/interactive on autoFIPC, but both run inside the nested checkCorrect() closure (aFIPC.R:129-149). Default mockery::stub reaches it only via shared lexical scope; extracting checkCorrect into a separate helper would silently break the stub.

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