TechFlow news, March 29 — Fairyproof released today a research report on Vitalik Buterin's proposed EIP-4844, stating that this EIP introduces significant changes to Ethereum client implementations and rollup solutions. While it may not introduce obvious vulnerabilities, the newly introduced blob transactions could lead to two mempool-related issues. The first is that blob transactions have variable intrinsic gas costs, making the mempool susceptible to attacks—transactions might qualify for inclusion in one block but fail to qualify for the next. To mitigate such attacks, the EIP recommends broadcasting only those transactions where the gas limit is at least double the current minimum, significantly increasing the likelihood of legitimate transactions being included. The second issue is that blob transactions carry large data payloads at the mempool layer, exposing the mempool to potential DoS attacks. To counter this, the EIP proposes increasing the minimum fee increment for mempool transaction replacement from 1.1x to 2x, thereby raising the cost for attackers and reducing attack attempts. From a security standpoint, developers must address these issues explicitly in their code. Additionally, the report advises users to be aware that these two recommendations aim to defend against mempool attacks; if implemented, they imply that non-malicious users who wish timely transaction processing will need to pay gas fees compliant with these guidelines. Earlier news reported that Ethereum's Vitalik Buterin proposed a new sharding upgrade via EIP-4844.
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