CVE-2018-13653 in ipshoots
Summary
by MITRE
The mintToken function of a smart contract implementation for ipshoots, 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 • 02/28/2020
The vulnerability identified in CVE-2018-13653 represents a critical integer overflow flaw within the mintToken function of an Ethereum-based smart contract implementation for the ipshoots token. This type of vulnerability falls under the CWE-190 category of integer overflow or wraparound, which occurs when arithmetic operations exceed the maximum value that can be represented by the underlying data type. The specific implementation flaw allows the contract owner to manipulate token balances in ways that should be impossible under normal operational conditions, creating a fundamental security breach in the token's accounting system.
The technical nature of this vulnerability stems from improper input validation and arithmetic handling within the smart contract's mintToken function. When the contract owner invokes this function, they can manipulate the token supply calculation in such a way that the resulting balance calculation overflows, effectively allowing them to set any user's token balance to an arbitrary value. This overflow occurs because the smart contract does not properly validate the input parameters or implement overflow checks before performing arithmetic operations on token amounts. The vulnerability is particularly dangerous because it operates at the core level of token management, directly affecting the contract's ability to maintain accurate and secure accounting of user holdings.
The operational impact of this vulnerability extends far beyond simple financial manipulation, creating significant risks for token holders and the broader ecosystem. An attacker with owner privileges can essentially create unlimited tokens or manipulate existing token balances to favor specific users, potentially leading to massive financial losses for other participants. This vulnerability undermines the fundamental trust in the token's integrity and could enable various malicious activities including market manipulation, unauthorized token distribution, or even complete theft of user funds. The implications are particularly severe in decentralized finance contexts where such vulnerabilities can compromise entire financial systems built on top of these tokens.
Mitigation strategies for this vulnerability require immediate implementation of proper integer overflow protections within the smart contract code. The most effective approach involves implementing comprehensive input validation, using safe arithmetic libraries such as OpenZeppelin's SafeMath, and ensuring all arithmetic operations include overflow checks before execution. Additionally, contract owners should conduct thorough security audits and consider implementing multi-signature ownership mechanisms to reduce the risk of single points of failure. The vulnerability demonstrates the critical importance of adhering to established security frameworks and best practices in smart contract development, as outlined in the ATT&CK framework's approach to blockchain-based attacks and the security considerations for smart contract implementations. Regular security testing and continuous monitoring of contract behavior remain essential practices for maintaining the integrity of token systems.