relicario/docs/superpowers/audits/2026-05-01-security-audit-opus-4-5.md

Verification: 2026-05-01 Security Audit

Verified by: Claude Opus 4.5
Date: 2026-05-01
Methodology: Code inspection of referenced file paths and line numbers

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Summary

Finding	File Exists	Lines Accurate	Vulnerability Real	Confidence
1 - Backup KDF NFC	✅	✅	✅	10/10
2 - Commit injection	✅	✅	✅	10/10
3 - WASM private key exposure	✅	✅	✅	10/10
4 - Test env vars in prod	✅	✅	✅	10/10
5 - AttachmentId 64-bit	✅	⚠️ off-by-1	✅	9/10
6 - Field history plaintext	✅	✅	✅	10/10
7 - Device keys non-functional	✅	✅	✅	10/10
8 - Path traversal restore	✅	✅	✅	10/10

Verdict: All 8 findings are verified as real vulnerabilities in the current codebase.

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Finding-by-Finding Verification

Finding 1 — Backup KDF missing NFC normalization

• File: crates/relicario-core/src/backup.rs
• Claimed lines: 303-312
• Verified: ✅ derive_backup_key at lines 303-312 passes passphrase directly to argon.hash_password_into() without NFC normalization. Compare to derive_master_key in crypto.rs:224-227 which explicitly normalizes.
• Impact confirmed: Cross-platform restore failure for non-ASCII passphrases.

Finding 2 — Commit message injection via item titles

• File: crates/relicario-cli/src/main.rs
• Claimed lines: 565, 899-901, 1110, 1327
• Verified: ✅
  • Line 565: format!("add: {} ({})", item.title, item.id.as_str())
  • Line 1110: format!("edit: {} ({})", item.title, item.id.as_str())
  • Line 1327: format!("trash: {} ({})", item.title, item.id.as_str())
• Impact confirmed: Newlines/control chars in titles corrupt git log output.

Finding 3 — WASM generate_device_keypair crosses private key to JS

• File: crates/relicario-wasm/src/lib.rs
• Claimed lines: 215-227
• Verified: ✅ Function returns { "private_key_base64": "..." } as JsValue, exposing ed25519 private key to JavaScript heap.
• Impact confirmed: Key material accessible to any JS in service worker context.

Finding 4 — Test env vars ship in production binary

• File: crates/relicario-cli/src/main.rs
• Claimed lines: 445-446, 421-423, 1425-1426
• Verified: ✅
  • Lines 421-423: RELICARIO_TEST_ITEM_SECRET
  • Lines 445-446: RELICARIO_TEST_PASSPHRASE
  • Lines 1425-1426: RELICARIO_TEST_BACKUP_PASSPHRASE
• Impact confirmed: All checked in production code without #[cfg(test)]. Passphrase visible in /proc/<pid>/environ.

Finding 5 — AttachmentId truncated to 64 bits

• File: crates/relicario-core/src/ids.rs
• Claimed lines: 52-57
• Actual lines: 51-56 (off by 1)
• Verified: ✅ &digest[..8] = 8 bytes = 64 bits. Birthday collision at ~2³² work.
• Impact confirmed: Attacker with attachment upload can cause silent overwrites.

Finding 6 — get_field_history returns plaintext to JS

• File: crates/relicario-wasm/src/lib.rs
• Claimed lines: 232-265
• Verified: ✅ Returns historical Password/Concealed values as plaintext JSON via v.as_str().to_owned().
• Impact confirmed: Password history exposed to JS heap without Zeroizing.

Finding 7 — Device key system is security theater

• File: crates/relicario-cli/src/main.rs
• Claimed lines: 2151-2221
• Verified: ✅ cmd_device() handles Add/List/Revoke but:
  • No sign_commit or verify_signature functions exist anywhere
  • devices.json is plaintext and unauthenticated
  • Revocation has no enforcement mechanism
• Impact confirmed: Users falsely believe device revocation provides security.

Finding 8 — Path traversal on backup restore

• File: crates/relicario-cli/src/main.rs
• Claimed lines: 1619-1626
• Verified: ✅

  for item in &unpacked.items {
      fs::write(target.join("items").join(format!("{}.enc", item.id)), ...)?;
  }
  

  item.id and attachment_id used directly in path construction with no validation.
• Impact confirmed: Crafted .relbak with id = "../../.bashrc" escapes target directory.

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Blockers Assessment

The audit's "Path to Certifiable Safety" section is accurate:

Blocker	Verified	Severity
B1 - Device key theater	✅ Real	High
B2 - Backup KDF NFC	✅ Real	Medium
B3 - Test env vars	✅ Real	Medium
B4 - Path traversal	✅ Real	Medium

All four blockers are confirmed. B1 is the most dangerous as it misleads users about their security posture.