CVE-2018-13722 in HYIPToken
Summary
by MITRE
The mint function of a smart contract implementation for HYIPToken, 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 as CVE-2018-13722 resides within the mint function of HYIPToken smart contract implementation on the Ethereum blockchain. This represents a critical security flaw that directly impacts the integrity and functionality of the token system. The issue stems from improper input validation and arithmetic handling within the contract's codebase, creating a scenario where the contract owner can manipulate user balances arbitrarily. Such a vulnerability fundamentally undermines the trustless nature of blockchain-based token systems and exposes the network to potential financial loss and system compromise.
The technical root cause of this vulnerability manifests as an integer overflow condition within the mint function implementation. When processing mint operations, the smart contract fails to properly validate or constrain the input parameters, allowing malicious actors with owner privileges to manipulate the balance calculations. This integer overflow occurs because the contract does not implement proper bounds checking or overflow protection mechanisms that are standard in secure smart contract development practices. The flaw enables an attacker to specify any arbitrary value for user balances, effectively allowing unlimited minting capabilities beyond intended contract parameters. This vulnerability aligns with CWE-190, which specifically addresses integer overflow and underflow conditions in software implementations.
The operational impact of CVE-2018-13722 extends far beyond simple balance manipulation, creating cascading effects throughout the token ecosystem. Contract owners can inflate user balances to arbitrary levels, potentially causing system-wide instability and financial disruption. The vulnerability enables attackers to drain contract resources or create artificial scarcity by manipulating token distributions, directly affecting market dynamics and user trust. In practical scenarios, this flaw could lead to significant financial losses for token holders and the broader ecosystem, as the fundamental accounting mechanisms of the token contract become compromised. The vulnerability also creates opportunities for exploitation through various attack vectors including front-running, sandwich attacks, and direct owner privilege abuse.
Mitigation strategies for this vulnerability require immediate code-level interventions and architectural improvements. The most effective approach involves implementing comprehensive input validation, proper integer overflow protection, and rigorous parameter checking within the mint function. Smart contract developers must incorporate defensive programming practices including bounded arithmetic operations, explicit overflow checks, and access control validation. Additionally, regular security audits and formal verification processes should be implemented to identify similar vulnerabilities before deployment. The remediation process should include thorough code review, automated testing with edge case scenarios, and comprehensive penetration testing to ensure the vulnerability has been fully addressed. Organizations should also consider implementing multi-signature ownership models and time-locks for critical operations to reduce the risk of unauthorized privilege exploitation. These measures align with established security frameworks and best practices for blockchain smart contract development, ensuring robust protection against similar integer overflow vulnerabilities.