CVE-2018-13547 in Providence Crypto Casino
Summary
by MITRE
The mintToken function of a smart contract implementation for Providence Crypto Casino (PVE) (Contract Name: ProvidenceCasinoToken), an Ethereum token, has an integer overflow that allows the owner of the contract to set the balance of an arbitrary user to any value.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 02/27/2020
The vulnerability identified as CVE-2018-13547 represents a critical integer overflow flaw within the mintToken function of the Providence Casino Token (PVE) smart contract deployed on the Ethereum blockchain. This vulnerability specifically affects the token implementation used by the Providence Crypto Casino platform, creating a fundamental security weakness that directly impacts the contract's ability to maintain accurate and secure user balances. The integer overflow occurs when the contract attempts to increment token balances without proper validation of arithmetic operations, allowing for unintended behavior in the token distribution mechanism.
The technical nature of this vulnerability stems from the lack of overflow protection in the mintToken function, which permits the contract owner to manipulate user balances arbitrarily. When the function processes token minting operations, it fails to validate that the resulting balance values remain within the bounds of the data type being used. This allows an attacker with owner privileges to specify any arbitrary value for a user's token balance, effectively bypassing normal token distribution limits and potentially enabling unlimited token creation. The vulnerability directly maps to CWE-190, which describes integer overflow and underflow conditions, and represents a classic example of improper input validation in smart contract environments where mathematical operations can have severe financial implications.
The operational impact of this vulnerability extends far beyond simple balance manipulation, as it fundamentally compromises the integrity of the token economy within the Providence Crypto Casino ecosystem. An attacker with owner access could inflate user balances to arbitrary levels, potentially enabling fraudulent activities including unauthorized token transfers, manipulation of game payouts, and disruption of the casino's economic model. The vulnerability also creates risks for other users who may be affected by sudden balance changes or potential token supply manipulation that could impact market value and trust in the platform. Additionally, the ability to set arbitrary balances undermines the fundamental principles of blockchain security and trustless transactions that users expect when interacting with smart contracts.
Mitigation strategies for this vulnerability require immediate attention from contract administrators and developers. The most effective solution involves implementing proper overflow protection mechanisms using modern Solidity practices such as SafeMath libraries or compiler versions that include built-in overflow checks. Contract owners should also consider implementing access control restrictions that limit the mintToken function to specific authorized addresses and implement comprehensive auditing procedures to monitor balance changes. The vulnerability demonstrates the critical importance of adhering to established security standards such as those outlined in the OWASP Smart Contract Security Verification Standard and aligns with ATT&CK techniques targeting smart contract manipulation. Regular security audits and formal verification processes should be implemented to prevent similar vulnerabilities from emerging in future contract deployments, particularly focusing on arithmetic operations and privilege escalation vectors that could compromise token economics and user funds.