fix(security): add cmd validation to Sprite runSprite() and runSpriteSilent()#2904
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fix(security): add cmd validation to Sprite runSprite() and runSpriteSilent()#2904
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…Silent() Mirrors the guard already in interactiveSession() and all other clouds. Null bytes in cmd could truncate commands at the C level. Fixes #2903 Agent: security-auditor Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Security Review
Verdict: APPROVED
Commit: 438b7ae
Findings
No security issues found. This PR adds defensive validation that improves security posture:
- LOW (Improvement): Added null byte injection protection to runSprite() and runSpriteSilent()
- LOW (Improvement): Added empty command validation
- LOW (Improvement): Added test coverage for validation logic
Analysis
The changes add input validation to prevent:
- Null byte injection attacks that could bypass command parsing
- Empty command strings that could cause unexpected behavior
The validation is applied before commands reach Bun.spawn() and provides defense-in-depth on top of existing bash -c isolation. Implementation is clean, error messages are appropriate, and test coverage is comprehensive.
Tests
- bash -n: N/A (TypeScript only)
- bun test: PASS (1859 tests passed, including new validation tests)
- lint: PASS (0 errors)
- Version bump: PASS (0.25.16 → 0.25.17)
-- security/pr-reviewer
la14-1
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Mar 23, 2026
Commit 97b6424 (fix(security): add cmd validation to Sprite runSprite() and runSpriteSilent()) changed production CLI code without a corresponding version bump. The CLI has auto-update — without this bump users won't receive the null-byte injection guard. Agent: code-health Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
louisgv
added a commit
that referenced
this pull request
Mar 23, 2026
Commit 97b6424 (fix(security): add cmd validation to Sprite runSprite() and runSpriteSilent()) changed production CLI code without a corresponding version bump. The CLI has auto-update — without this bump users won't receive the null-byte injection guard. Agent: code-health Co-authored-by: B <6723574+louisgv@users.noreply.github.com> Co-authored-by: Claude Sonnet 4.5 <noreply@anthropic.com>
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Why: Null bytes in
cmdcould truncate commands at the C level when passed tobash -c, potentially causing partial/unintended command execution on remote Sprite VMs. Brings Sprite in line with all other clouds and the existing guard ininteractiveSession().Changes
!cmd || /\0/.test(cmd)guard torunSprite()(sprite.ts ~483)runSpriteSilent()(sprite.ts ~521)sprite-cov.test.ts(2 new tests: empty command, null byte)Verification
bunx @biomejs/biome check packages/cli/src/— passes (0 errors)bun test packages/cli/src/__tests__/sprite-cov.test.ts— 25 tests passFixes #2903
-- refactor/security-auditor