{"id":9547,"date":"2025-03-10T08:03:33","date_gmt":"2025-03-10T07:03:33","guid":{"rendered":"https:\/\/wsj-crypto.com\/?p=9547"},"modified":"2025-03-10T08:03:33","modified_gmt":"2025-03-10T07:03:33","slug":"mysterious-intruder-disrupts-pectra-upgrade-on-sepolia-network","status":"publish","type":"post","link":"https:\/\/wsj-crypto.com\/index.php\/2025\/03\/10\/mysterious-intruder-disrupts-pectra-upgrade-on-sepolia-network\/","title":{"rendered":"Mysterious Intruder Disrupts Pectra Upgrade on Sepolia Network"},"content":{"rendered":"

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An Ethereum programmer claims that the latest Pectra enhancement of the Sepolia testnet encountered issues, exacerbated when an intruder utilized an \u201cedge case\u201d to facilitate the mining of void blocks.<\/p>\n

Pectra debuted on its ultimate testnet<\/a>, Sepolia, at 7:29 am on March 5, yet Ethereum programmer Marius van der Wijden stated in a March 8 article<\/a> that the team promptly began receiving error notifications on their geth node along with the mining of empty blocks.<\/p>\n

The problem arose as a result of the deposit contract invoking the incorrect type of event \u2014 a transfer event instead of a deposit, according to Van der Wijden.<\/p>\n

A remedy was implemented, however, van der Wijden noted that one edge case was overlooked, and an unidentified individual took advantage by sending a 0-token transfer to the deposit address, which provoked the error once more.<\/p>\n

\u201cAfter a short time, we observed numerous empty blocks again, prompting us to check the transaction pools once more where we discovered another problematic transaction triggering the same edge case,\u201d he stated.<\/p>\n

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Source: <\/em>Marius van der Wijden<\/em><\/a><\/p>\n<\/figcaption><\/figure>\n

\u201cInitially, we suspected that someone among the trusted validators had made an error, but we quickly became aware that this transaction stemmed from a newly funded account from the faucet.\u201d<\/p>\n

The ERC-20 standard does not prohibit a zero token transfer, enabling anyone, even those without any tokens, to conduct transfers to another address, which the unidentified user discovered, remarked van der Wijden.<\/p>\n

\u201cThe only solution to halt the assault would be to filter out all transactions interacting with the deposit contract. Thus, we implemented a private fix, which we distributed to several of the DevOps nodes.\u201d<\/p>\n

\u201cWe had suspicions that the assailant was monitoring some of our discussions, so we opted not to announce the fix publicly but only applied updates to a few controlled nodes in order to achieve more filled blocks on the network,\u201d he added.<\/p>\n

\"Fork,
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Source: <\/em>Marius van der Wijden<\/em><\/a><\/p>\n<\/figcaption><\/figure>\n

By 2 pm, all nodes had received the update, and the unidentified user transaction was successfully mined.<\/p>\n

Van der Wijden stated that they did not experience any loss of finalization during the event, and the concern was confined to Sepolia because they were operating a token-gated deposit contract rather than the standard mainnet deposit contract.<\/p>\n

Earlier, the developers tested the Pectra upgrade on the Holesky testnet<\/a> on February 26, which also faced difficulties.<\/p>\n

Consequently, the developers have resolved to delay the Pectra upgrade until further testing can be completed.<\/p>\n

Related: <\/strong><\/em>Ether sentiment reaches yearly low but this may be a positive sign: Santiment<\/strong><\/em><\/a><\/p>\n

The Pectra fork<\/a> follows the network\u2019s Dencun enhancement, which reduced transaction costs for layer-2 systems and enhanced the economics<\/a> of Ethereum rollups. The Dencun hard fork was executed on March 13, 2024.<\/p>\n

The Ethereum Foundation recently announced a new leadership structure<\/a>, with Hsiao-Wei Wang and Tomasz Sta\u0144czak serving as co-directors of the foundation.<\/p>\n

Magazine: <\/strong><\/em>MegaETH launch could save Ethereum\u2026 but at what cost?<\/strong><\/em><\/a><\/p>\n