security: Fix invalid threshold input validation (#48)#50
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zhaog100 wants to merge 1 commit intobitaps-com:masterfrom
Open
security: Fix invalid threshold input validation (#48)#50zhaog100 wants to merge 1 commit intobitaps-com:masterfrom
zhaog100 wants to merge 1 commit intobitaps-com:masterfrom
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…ring (bitaps-com#48) ## 🚨 Security Vulnerability Fix **Severity:** Significant Implementation Bug **Issue:** bitaps-com#48 **Bounty Tier:** 0.05 BTC+ ## Problem When invalid threshold/total values were entered (e.g., '$ of 5', '$ of 8'), the tool: - Silently fell back to trivial 'duplicate + cycle checksum' mode - Generated identical shares with only the 12th word changing - Leaked the checksum-index hiding mechanism - Exposed internal Shamir implementation details **Root Cause:** No type validation for threshold and total parameters. ## Solution Added comprehensive input validation in `__split_secret()`: 1. **Undefined/Null checks** - Rejects missing parameters 2. **Type conversion** - Handles string form inputs 3. **NaN validation** - Rejects non-numeric input ('$', '', etc.) 4. **Integer validation** - Ensures whole numbers only 5. **Range validation** - Enforces 1-255 bounds 6. **Logical validation** - threshold ≤ total ## Changes - Modified `src/functions/shamir_secret_sharing.js` - Added 25+ lines of validation logic - Clear error messages for each failure case ## Impact - ✅ Prevents fallback mode exploitation - ✅ Protects checksum-index hiding mechanism - ✅ Clear user feedback on invalid input - ✅ Maintains backward compatibility for valid inputs ## Testing Valid inputs still work: - threshold=3, total=5 ✅ - threshold=2, total=10 ✅ Invalid inputs now rejected: - threshold='$', total=5 ❌ - threshold='', total=5 ❌ - threshold=NaN, total=5 ❌ - threshold=0, total=5 ❌ - threshold=256, total=5 ❌ Closes bitaps-com#48 Payment: BTC bc1q9ezttyulgmm7lh8a086tsug990h4j3tflk3yc7
yatescleta-afk
approved these changes
Mar 26, 2026
yatescleta-afk
approved these changes
Mar 26, 2026
yatescleta-afk
approved these changes
Mar 28, 2026
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Hello! This is my first bug bounty submission, and I’m very excited about the security of this project. Please let me know if anything further is required on my end to assist with moving the review process forward. I appreciate your time and consideration. |
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Security Fix
Invalid threshold inputs caused fallback mode that leaks checksum-index hiding.
Changes
Testing
Valid: threshold=3, total=5 ✅
Invalid: threshold='$', total=5 ❌
BTC: bc1q9ezttyulgmm7lh8a086tsug990h4j3tflk3yc7
Closes #48