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Analyzing Ethereum Smart Contract Vulnerabilities at Scale Based on Inter-Contract Dependency

Qiuyun Lyu1, Chenhao Ma1, Yanzhao Shen2, Shaopeng Jiao3, Yipeng Sun1, Liqin Hu1,*

1 School of Cyberspace, Hangzhou Dianzi University, Hangzhou, 310018, China
2 Research and Development Department, Shandong Institute of Blockchain, Jinan, 250102, China
3 Security Team, Shanghai Anshi Network Technology, Ltd., Shanghai, 200233, China

* Corresponding Author: Liqin Hu. Email: email

(This article belongs to this Special Issue: Emerging Trends on Blockchain: Architecture and Dapp Ecosystem)

Computer Modeling in Engineering & Sciences 2023, 135(2), 1625-1647. https://doi.org/10.32604/cmes.2022.021562

Abstract

Smart contracts running on public blockchains are permissionless and decentralized, attracting both developers and malicious participants. Ethereum, the world’s largest decentralized application platform on which more than 40 million smart contracts are running, is frequently challenged by smart contract vulnerabilities. What’s worse, since the homogeneity of a wide range of smart contracts and the increase in inter-contract dependencies, a vulnerability in a certain smart contract could affect a large number of other contracts in Ethereum. However, little is known about how vulnerable contracts affect other on-chain contracts and which contracts can be affected. Thus, we first present the contract dependency graph (CDG) to perform a vulnerability analysis for Ethereum smart contracts, where CDG characterizes inter-contract dependencies formed by DELEGATECALL-type internal transaction in Ethereum. Then, three generic definitions of security violations against CDG are given for finding respective potential victim contracts affected by different types of vulnerable contracts. Further, we construct the CDG with 195,247 smart contracts active in the latest blocks of the Ethereum and verify the above security violations against CDG by detecting three representative known vulnerabilities. Compared to previous large-scale vulnerability analysis, our analysis scheme marks potential victim contracts that can be affected by different types of vulnerable contracts, and identify their possible risks based on the type of security violation actually occurring. The analysis results show that the proportion of potential victim contracts reaches 14.7%, far more than that of corresponding vulnerable contracts (less than 0.02%) in CDG.

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Cite This Article

Lyu, Q., Ma, C., Shen, Y., Jiao, S., Sun, Y. et al. (2023). Analyzing Ethereum Smart Contract Vulnerabilities at Scale Based on Inter-Contract Dependency. CMES-Computer Modeling in Engineering & Sciences, 135(2), 1625–1647.



cc This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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