CVE-2018-13580 in ProvidenceCasino
Summary
by MITRE
The mintToken function of a smart contract implementation for ProvidenceCasino (PVE), 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.
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Analysis
by VulDB Data Team • 02/27/2020
The vulnerability identified as CVE-2018-13580 resides within the mintToken function of the ProvidenceCasino (PVE) Ethereum token smart contract implementation. This represents a critical integer overflow flaw that fundamentally compromises the contract's integrity and financial security. The vulnerability allows the contract owner to manipulate user balances arbitrarily, effectively enabling unauthorized fund manipulation and potentially leading to complete financial control over the token ecosystem.
The technical flaw manifests as an integer overflow condition within the mintToken function where the contract fails to properly validate or constrain numeric inputs during balance calculations. When the owner invokes this function, they can specify any target user address and set their token balance to an arbitrary value without proper overflow checking mechanisms. This type of vulnerability falls under CWE-190, which specifically addresses integer overflow and underflow conditions, and represents a classic example of insufficient input validation in smart contract environments. The lack of proper boundary checks and overflow protection creates a pathway for malicious or accidental manipulation of token distributions.
The operational impact of this vulnerability extends far beyond simple balance manipulation, as it fundamentally undermines trust in the token system and creates potential for significant financial loss. An attacker with owner privileges can inflate balances of specific users, potentially creating artificial market conditions or enabling unauthorized transfers. The vulnerability also exposes the contract to potential reentrancy attacks and other malicious activities that exploit the compromised state of the token ledger. From an attacker's perspective, this represents a high-value target as it provides complete control over user balances without requiring external validation or additional attack vectors, making it particularly dangerous in decentralized finance applications.
Mitigation strategies for this vulnerability require immediate implementation of comprehensive input validation and overflow protection mechanisms within the smart contract code. The mintToken function must incorporate proper bounds checking and overflow detection before any balance modifications occur, utilizing safe arithmetic operations or libraries specifically designed for Ethereum smart contracts. Additionally, the contract owner should implement proper access control measures and consider using multi-signature wallets for administrative functions to reduce the risk of unauthorized access. Organizations should also conduct thorough smart contract audits and implement continuous monitoring systems to detect anomalous balance changes. The vulnerability aligns with ATT&CK technique T1548.001, which covers privilege escalation through code injection, and represents a clear example of how insufficient input validation can lead to complete system compromise in blockchain environments.