CVE-2018-13144 in Pandora PDX
Summary
by MITRE • 01/25/2023
The transfer and transferFrom functions of a smart contract implementation for Pandora (PDX), an Ethereum token, have an integer overflow.
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Analysis
by VulDB Data Team • 08/05/2024
The vulnerability identified as CVE-2018-13144 affects the Pandora (PDX) token smart contract running on the Ethereum blockchain, representing a critical integer overflow flaw in the token's core transfer functionality. This vulnerability specifically impacts the transfer and transferFrom functions, which are fundamental operations for moving tokens between accounts within the decentralized ecosystem. The flaw exists in the smart contract implementation that governs the PDX token's behavior, creating a scenario where mathematical operations can exceed the maximum value that can be represented by the data types used in the contract.
The technical nature of this vulnerability stems from improper input validation and arithmetic operation handling within the smart contract code. When the transfer and transferFrom functions process token amounts, they fail to properly check for integer overflow conditions that occur when the result of an arithmetic operation exceeds the maximum value that can be stored in the designated data type. This creates a scenario where a malicious actor could manipulate transaction parameters to cause the arithmetic operations to wrap around to unexpected values, effectively allowing unauthorized token manipulation. The vulnerability is classified under CWE-190 as an integer overflow or wraparound, which represents one of the most common and dangerous classes of software vulnerabilities in blockchain smart contracts.
The operational impact of this vulnerability is severe and multifaceted, affecting both the integrity of the token economy and the security of user assets. An attacker could exploit this flaw to transfer more tokens than they actually possess, effectively creating an unlimited supply of tokens or bypassing balance restrictions. This type of vulnerability directly undermines the fundamental principles of blockchain security and trust, as it allows for unauthorized wealth creation and potential market manipulation. The vulnerability also creates opportunities for denial of service attacks against the token ecosystem, as the overflow conditions could potentially cause contract failures or unexpected behavior that disrupts normal operations.
The implications of this vulnerability extend beyond immediate financial loss to include broader ecosystem damage and loss of user confidence in the PDX token and similar implementations. This flaw demonstrates the critical importance of rigorous smart contract auditing and testing before deployment on public blockchains, as vulnerabilities in token contracts can have cascading effects throughout the entire ecosystem. The attack surface for such vulnerabilities aligns with ATT&CK technique T1499.004, which involves data manipulation through smart contract exploits, and represents a direct threat to the integrity of decentralized financial systems. Organizations and developers should implement comprehensive testing procedures including formal verification methods and automated security scanning tools to identify similar issues in other smart contract implementations, as integer overflows remain one of the most prevalent vulnerabilities in blockchain-based applications.
Mitigation strategies for this vulnerability require immediate contract upgrades and redeployments to fix the integer overflow conditions through proper bounds checking and overflow prevention mechanisms. Developers should implement comprehensive input validation, use safe arithmetic libraries, and conduct thorough security audits before deploying any token contracts to mainnet environments. Additionally, the use of established frameworks and libraries that include built-in overflow protection mechanisms can significantly reduce the risk of similar vulnerabilities. Regular security assessments and continuous monitoring of deployed contracts are essential practices that help identify and remediate potential security flaws in real-time, protecting both user assets and the overall integrity of blockchain-based financial systems.