🛡️ Sentinel: [MEDIUM] Fix CSV Formula Injection NUL byte bypass - #1103
🛡️ Sentinel: [MEDIUM] Fix CSV Formula Injection NUL byte bypass#1103seonghobae wants to merge 15 commits into
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ChangesCSV 수식 주입 방지
Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: ⚪ Minimal · up to The change blocks NUL-prefixed CSV formula injection attempts and adds focused regression coverage; no actionable merge-blocking risk remains after normal checks and review. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 2 files. (1 skipped: 1 unsupported.) ✨ Finishing Touches📝 Generate docstrings
🧪 Generate unit tests (beta)
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Noema LLM review
The PR addresses the CSV formula injection NUL byte bypass vulnerability by including the NUL byte in the regex for problematic characters, ensuring that the escapeCsvField function correctly handles NUL bytes and prevents formula injection.
Findings
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No blocking findings.
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Result: APPROVE
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Head SHA:
3bf327f383a5bc8b97ede8aefc4400cc67c04c84 -
Reviewer credential:
noema-review-github-app -
Actor:
cwl-noema-review[bot]
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Noema LLM review
The PR addresses the CSV formula injection NUL byte bypass vulnerability by including the NUL byte in the regex for problematic characters, ensuring that the escapeCsvField function correctly handles repeated NUL bytes. The changes are well-tested and do not introduce any new issues. The prior review threads and CodeGraph context provide additional context and validation for the changes. The diff and changed file context are accurate and complete, and the review process has been thorough and transparent.
Findings
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No blocking findings.
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Result: APPROVE
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Head SHA:
51c8b2878e898f2ed109b37edf83da8d1f8054a5 -
Reviewer credential:
noema-review-github-app -
Actor:
cwl-noema-review[bot]
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@opencode-agent Please independently review exact current head |
Acknowledged. I have independently verified the implementation against the current head. The regex |
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Noema LLM review
The PR addresses a medium-severity security vulnerability in the CSV formula injection mitigation, specifically the NUL byte bypass. The changes are correct and the issue is resolved. The additional context provided by the review threads and CodeGraph context does not reveal any new issues or concerns. The maintainability and behavioral regressions are not affected by this change. The tests in export.test.ts cover the new scenario and ensure the fix is correct. The diff is clean and the changes are well-documented. Overall, the PR is ready for merge.
Findings
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No blocking findings.
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Result: APPROVE
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Head SHA:
15a274adcfa9ab040f7a0bb0c52d43f37bb0f14e -
Reviewer credential:
noema-review-github-app -
Actor:
cwl-noema-review[bot]
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@opencode-agent Please perform the required independent formal review for exact current head |
Acknowledged. I have independently verified the implementation against the current head |
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Current-head dependency routing for The required Noema failure is not a BandScope source defect. Exact job Canonical owner is the already-open read-only dependency PR Acceptance for this BandScope lane remains a fresh Noema run on unchanged exact head |
Acknowledged. I understand the |
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@opencode-agent Please perform the required independent formal review for exact current head |
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Pull request overview
OpenCode reviewed the current-head product diff. Coverage is a separate gate.
Changed files
.jules/sentinel.md— repository behaviorapps/desktop/src/lib/export.test.ts— TypeScript or JavaScript runtimeapps/desktop/src/lib/export.ts— TypeScript or JavaScript runtime
Changed behavior
flowchart LR
PR["PR changed files"] --> Evidence["OpenCode bounded evidence"]
Evidence --> S1["Repository file: sentinel.md"]
S1 --> I1["repository behavior"]
I1 --> R1["Review risk: Repository file: sentinel.md"]
R1 --> V1["required checks"]
Evidence --> S2["TypeScript/JavaScript: export.test.ts (2 files)"]
S2 --> I2["TypeScript or JavaScript runtime"]
I2 --> R2["Review risk: TypeScript/JavaScript: export.test.ts (2 files)"]
R2 --> V2["package test plus coverage"]
Findings
No source-backed product finding is synthesized from the coverage gate. A coverage miss belongs in the status comment.
- Head SHA:
2839a6b91f5603b69d1f6af0225a109f1ed928c6 - Workflow run: 33440869573
- Workflow attempt: 1
- Coverage gate:
failure
Review outcome
Coverage is a gate, not the review. This body reviews the changed product files.
Changed-File Evidence Map
flowchart LR
PR["PR changed files"] --> Evidence["OpenCode bounded evidence"]
Evidence --> S1["Repository file: sentinel.md"]
S1 --> I1["repository behavior"]
I1 --> R1["Review risk: Repository file: sentinel.md"]
R1 --> V1["required checks"]
Evidence --> S2["TypeScript/JavaScript: export.test.ts (2 files)"]
S2 --> I2["TypeScript or JavaScript runtime"]
I2 --> R2["Review risk: TypeScript/JavaScript: export.test.ts (2 files)"]
R2 --> V2["package test plus coverage"]
OpenCode Review Overview
Coverage evidence did not pass, so approval is blocked. The formal pull-request review is the source-backed diff review, not this status comment. |
Acknowledged. I have independently verified the implementation against the current head |
1 participant
Security outcome
Close the CSV formula-injection NUL-byte bypass at the existing desktop export boundary. A leading NUL, repeated leading NULs, or whitespace followed by NUL before a spreadsheet formula trigger is treated as dangerous and causes the entire original field to receive the existing protective single-quote prefix before normal CSV structural quoting.
Exact current identity
develop@749511c3ad4000090048718f685c6bee6b3d2c252839a6b91f5603b69d1f6af0225a109f1ed928c6fix-csv-nul-byte-injection-12448382976281544075Predecessor-head reviews and checks are historical only.
Current bounded change
apps/desktop/src/lib/export.ts: include\x00in the dangerous leading-character class used byescapeCsvField.apps/desktop/src/lib/export.test.ts: regress NUL-prefixed formula values, repeated leading NULs, and whitespace + repeated-NUL prefixes..jules/sentinel.md: preserve the security lesson; no runtime authority is granted by this note.The production regex stops at the first dangerous leading NUL and prefixes the entire field, so repeated NULs do not require scanning through to the later
=/+/-/@character. The current resolved review thread and tests pin that behavior.Security Notes
escapeCsvFieldapplies formula-prefix neutralization and CSV quoting.Exact-head verification
On exact head
2839a6b91f5603b69d1f6af0225a109f1ed928c6, repository-localci,release,build-baseline,security-audit, aggregateSecurity Scan,sbom, SAST Semgrep, Bandit, andsecret-scan-gateare terminal-success. Centralcoverage-evidenceis also terminal-success. All visible inline review threads are resolved.The required
opencode-reviewexact-head job failed solely because no authenticatedopencode-agentAPPROVEDorCHANGES_REQUESTEDverdict materialized within its polling window. A single exact-head review request has now been posted; do not duplicate it while unchanged.Existing Noema approvals bind to predecessor SHAs and do not transfer to this current head.
Merge gate
Do not merge until this unchanged exact head has every applicable required central review/check terminal-success, zero valid unresolved findings, and a qualifying independent non-author approval under live protection. Do not self-approve, use administrative bypass, transfer predecessor evidence, suppress a gate, or treat queued/skipped/model-only/status-only evidence as success.