CVE-2018-13732 in RiptideCoin
Summary
by MITRE
The mintToken function of a smart contract implementation for RiptideCoin (RIPT), 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 CVE-2018-13732 vulnerability represents a critical integer overflow flaw within the mintToken function of the RiptideCoin (RIPT) smart contract deployed on the Ethereum blockchain. This vulnerability stems from inadequate input validation and arithmetic overflow handling within the contract's token minting mechanism, creating a fundamental security weakness that directly impacts the contract's integrity and user asset protection. The flaw specifically manifests when the contract owner attempts to mint new tokens for users, allowing them to manipulate token balances beyond normal operational parameters.
The technical implementation of this vulnerability occurs due to the absence of proper overflow checks in the mintToken function, which processes token creation requests without validating that the resulting balance would exceed the maximum value that can be stored in the underlying data type. This integer overflow condition enables attackers with contract ownership privileges to manipulate user balances arbitrarily, effectively allowing them to create unlimited tokens or set any user account balance to any desired value. The vulnerability is classified under CWE-190 as an integer overflow or wraparound, specifically occurring during arithmetic operations that exceed the maximum representable value for the data type used to store token balances.
From an operational perspective, this vulnerability creates severe implications for the RiptideCoin ecosystem and its users. The contract owner can exploit this flaw to manipulate token distributions, potentially creating artificial scarcity or flooding the market with tokens. Users may experience unauthorized balance modifications that could result in loss of funds or manipulation of token economics. The vulnerability essentially grants the contract owner unlimited control over token distribution and user account balances, undermining the fundamental trust and predictability that blockchain-based token systems rely upon for their economic models and user confidence.
The impact of this vulnerability extends beyond immediate financial loss to encompass broader security implications for the Ethereum smart contract ecosystem. It demonstrates the critical importance of proper input validation and arithmetic overflow protection in blockchain applications, where such flaws can be exploited to manipulate the entire token economy. The vulnerability aligns with ATT&CK technique T1548.001 for privilege escalation and T1499.004 for data manipulation, as it allows the contract owner to escalate their privileges through legitimate contract functions while simultaneously manipulating the token balance data. Organizations implementing Ethereum-based token contracts must understand that such vulnerabilities can completely compromise the security model of their systems.
Mitigation strategies for CVE-2018-13732 require immediate contract upgrades that implement proper integer overflow checks using modern Solidity practices and libraries such as OpenZeppelin's SafeMath. The contract should validate all input parameters before executing arithmetic operations, ensuring that balance calculations do not exceed maximum data type limits. Additionally, contract owners should implement comprehensive access controls and consider using multi-signature wallets for critical operations. Regular security audits and formal verification processes should be established to identify similar vulnerabilities in smart contract implementations. The vulnerability underscores the necessity of following established security frameworks and best practices for blockchain development, including the use of verified libraries and thorough testing of all arithmetic operations within smart contracts.