CVE-2018-14088
📋 TL;DR
This CVE describes an integer overflow vulnerability in the STeX White List (STE(WL)) Ethereum token smart contract. When the contract owner sets a large 'amount' value, the calculation 'amount * 1000000000000000' in the withdrawToFounders() function overflows, potentially allowing unauthorized token transfers. This affects anyone holding or interacting with the STE(WL) token on the Ethereum blockchain.
💻 Affected Systems
- STeX White List (STE(WL)) Ethereum token smart contract
📦 What is this software?
Stex White List by Stex White List Project
⚠️ Risk & Real-World Impact
Worst Case
Contract owner could drain all tokens from the contract, causing complete loss of funds for token holders and potentially collapsing the token's value.
Likely Case
Contract owner exploits the overflow to withdraw excessive tokens beyond intended limits, leading to significant financial losses for token holders.
If Mitigated
With proper smart contract auditing and overflow protection mechanisms, the vulnerability would be caught before deployment, preventing any exploitation.
🎯 Exploit Status
Exploitation requires the contract owner role. The overflow mechanism is straightforward once the vulnerability is understood.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: N/A
Vendor Advisory: N/A
Restart Required: No
Instructions:
1. Deploy a new, fixed version of the smart contract using SafeMath libraries or overflow checks. 2. Migrate all token holders to the new contract. 3. Abandon the vulnerable contract. Note: Smart contracts are immutable once deployed, so the original contract cannot be patched.
🔧 Temporary Workarounds
Contract Migration
allCreate and deploy a new smart contract with proper integer overflow protection and migrate all token holders
N/A - Requires smart contract development and deployment
🧯 If You Can't Patch
- Monitor the vulnerable contract for suspicious withdrawal transactions
- Warn all token holders about the vulnerability and recommend they move funds to a secure wallet
🔍 How to Verify
Check if Vulnerable:
Review the smart contract source code for the withdrawToFounders() function and check for overflow protection in multiplication operationsCheck Version:
Check the contract address on Etherscan or similar blockchain explorer to verify deployment of the fixed contractVerify Fix Applied:
Audit the new contract code to ensure SafeMath libraries or explicit overflow checks are implemented in all arithmetic operations📡 Detection & Monitoring
Log Indicators:
- Unusually large withdrawal transactions from the contract
- Multiple withdrawal transactions in quick succession
Network Indicators:
- Monitoring Ethereum blockchain for transactions to/from the vulnerable contract address
SIEM Query:
N/A - This requires blockchain transaction monitoring rather than traditional SIEM