CVE-2018-13206 in ProvidenceCasino
Summary
by MITRE
The sell function of a smart contract implementation for ProvidenceCasino (PVE), an Ethereum token, has an integer overflow in which "amount * sellPrice" can be zero, consequently reducing a seller's assets.
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Analysis
by VulDB Data Team • 02/25/2020
The vulnerability identified in CVE-2018-13206 resides within the sell function of a smart contract implementation for the ProvidenceCasino (PVE) Ethereum token, representing a critical integer overflow flaw that directly impacts asset management and financial integrity. This vulnerability stems from improper input validation and arithmetic handling within the smart contract code, where the multiplication operation between amount and sellPrice can result in a zero value under specific conditions. The flaw manifests when the contract fails to properly validate the multiplication result, allowing for potential manipulation of asset values during token sales. Such an issue fundamentally undermines the trustless nature of blockchain transactions by creating scenarios where user assets can be unexpectedly reduced without proper authorization or transparent accounting.
The technical implementation of this vulnerability aligns with CWE-190, which specifically addresses integer overflow and underflow conditions in software systems. In the context of smart contracts, this flaw represents a classic example of how mathematical operations can be exploited when proper boundary checks are absent. The sell function's inability to properly handle large integer multiplications or validate the resulting values creates a scenario where sellers may experience unexpected reductions in their token holdings. The zero result from amount * sellPrice indicates that either the amount parameter or sellPrice parameter (or both) may have been manipulated or validated incorrectly, leading to unintended financial consequences for users who attempt to sell their tokens.
From an operational perspective, this vulnerability creates significant risk for users participating in the ProvidenceCasino ecosystem, as it directly impacts their ability to realize value from token sales. The reduction of seller assets due to zero multiplication results can lead to substantial financial losses, particularly when users are unaware of the underlying mathematical conditions that trigger the overflow. Attackers could potentially exploit this vulnerability by carefully crafting input values that cause the multiplication to yield zero, effectively stealing or reducing the value of tokens that should be transferred to sellers. The impact extends beyond individual users to potentially destabilize the entire token economy if exploited at scale, as it undermines confidence in the smart contract's ability to accurately execute token transactions.
The implications of this vulnerability extend into the broader cybersecurity landscape, particularly concerning smart contract security and the principles outlined in the ATT&CK framework for blockchain environments. This flaw demonstrates how basic mathematical operations in decentralized applications can become attack vectors when proper input validation and overflow protection mechanisms are missing. Security practitioners should consider implementing comprehensive testing procedures that specifically target arithmetic operations and boundary conditions in smart contract implementations. Mitigation strategies should include thorough code review processes that enforce proper integer validation, implementation of overflow protection mechanisms such as SafeMath libraries, and comprehensive testing of edge cases including zero values and maximum integer limits. Additionally, the vulnerability underscores the importance of formal verification processes and continuous security auditing of smart contract implementations to prevent similar issues from compromising user assets and system integrity.