{"id":48444,"date":"2021-08-27T18:15:37","date_gmt":"2021-08-27T15:15:37","guid":{"rendered":"https:\/\/forklog.com\/en\/?p=48444"},"modified":"2025-09-02T02:13:28","modified_gmt":"2025-09-01T23:13:28","slug":"ethereum-network-records-a-major-block-reorganisation","status":"publish","type":"post","link":"https:\/\/u1f987.com\/en\/ethereum-network-records-a-major-block-reorganisation\/","title":{"rendered":"Ethereum network records a major block reorganisation"},"content":{"rendered":"<p>A large-scale reorganisation of blocks was recorded on the Ethereum network (more than 450, according to <a href=\\\"https:\/\/blockchair.com\/ru\/ethereum\\\">Blockchair<\/a> and <a href=\\\"https:\/\/etherscan.io\/\\\">Etherscan<\/a>), according to developer Martin Holst Svende. The bug affected versions of the Geth client up to v1.10.7 and earlier.<\/p>\n<blockquote class=\"twitter-tweet\">\n<p lang=\"en\" dir=\"ltr\">A consensus bug hit <a href=\\\"https:\/\/twitter.com\/hashtag\/ethereum?src=hash&#038;ref_src=twsrc%5Etfw\\\">#ethereum<\/a> mainnet today, exploiting the consensus-bug that was fixed in geth v1.10.8. Fortunately, most miners were already updated, and the correct chain is also the longest (canon)<\/p>\n<p>PSA: Update to v1.10.8!<\/p>\n<p>\u2014 M H (((Swende))) (@mhswende) <a href=\\\"https:\/\/twitter.com\/mhswende\/status\/1431259601530458112?ref_src=twsrc%5Etfw\\\">August 27, 2021<\/a><\/p><\/blockquote>\n<p> <script async=\\\"\" src=\\\"https:\/\/platform.twitter.com\/widgets.js\\\" charset=\\\"utf-8\\\"><\/script><\/p>\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u00abI think this is the end of our experiment in publicly disclosing urgent fixes,\u00bb Svende wrote.<\/p>\n<\/blockquote>\n<p>According to him, the cause was the exploitation of a bug, which <a href=\"https:\/\/u1f987.com\/en\/news\/developers-fix-a-serious-bug-in-ethereums-popular-client\">had become known earlier<\/a>. On August 24, the Geth developers released version v1.10.8 and urged all users to update their software.<\/p>\n<p>Experts recommended refraining from making transactions. Svende noted that most miners were using up-to-date software, and the \u201ccorrect\u201d chain turned out to be the longest.<\/p>\n<p>According to <a href=\\\"https:\/\/www.ethernodes.org\/client\/geth\\\">Ethernodes.org<\/a>, at the time of writing 73% of Geth clients were still using older versions. This means that about 54% of Ethereum nodes are operating with a serious infrastructure fault.<\/p>\n<div class=\"wp-block-text-wrappers-update-2 article_update\"><time class=\"gtb_text-wrappers_update_time\">27 \u0430\u0432\u0433\u0443\u0441\u0442\u0430 2021 | 20:06<\/time><span class=\"gtb_text-wrappers_update_head\">\u0410\u043f\u0434\u0435\u0439\u0442: <\/span><\/p>\n<p>Go Ethereum developer Marius van der Wijden, in a comment to <a href=\\\"https:\/\/www.coindesk.com\/tech\/2021\/08\/27\/ethereum-faces-chain-split-as-node-operators-fail-to-update-geth-hotfix\/\\\">CoinDesk<\/a>, said that after disclosure \u201cthe exploit was inevitable.\u201d<\/p>\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>\u00abI knew that someone would eventually find the bug. I simply hoped more people would update over time,\u00bb the specialist explained.<\/p>\n<\/blockquote>\n<p>According to him, the team responded to the problem \u201cquickly and adequately.\u201d van der Wijden confirmed that the attack was caused by the exploitation of the bug by a single address, but declined to disclose details.<\/p>\n<div class=\"wp-block-text-wrappers-update-2 article_update\"><time class=\"gtb_text-wrappers_update_time\">27 \u0430\u0432\u0433\u0443\u0441\u0442\u0430 2021 | 20:20<\/time><span class=\"gtb_text-wrappers_update_head\">\u0410\u043f\u0434\u0435\u0439\u0442: <\/span><\/p>\n<p>Beiko confirmed that BTC.com had updated. He said Binance was in progress.<\/p>\n<blockquote class=\"twitter-tweet\">\n<p lang=\"en\" dir=\"ltr\"><a href=\\\"https:\/\/t.co\/zGgP0mRbIy\\\">https:\/\/t.co\/zGgP0mRbIy<\/a> has upgraded and Binance is in the process of doing so \ud83c\udfd7 <a href=\\\"https:\/\/t.co\/bJeK3hsji1\\\">https:\/\/t.co\/bJeK3hsji1<\/a><\/p>\n<p>\u2014 Tim Beiko | timbeiko.eth (@TimBeiko) <a href=\\\"https:\/\/twitter.com\/TimBeiko\/status\/1431302165365145603?ref_src=twsrc%5Etfw\\\">August 27, 2021<\/a><\/p><\/blockquote>\n<p> <script async=\\\"\" src=\\\"https:\/\/platform.twitter.com\/widgets.js\\\" charset=\\\"utf-8\\\"><\/script>\n<\/div>\n<div class=\"wp-block-text-wrappers-update-2 article_update\"><time class=\"gtb_text-wrappers_update_time\">31 \u0430\u0432\u0433\u0443\u0441\u0442\u0430 2021 | 10:30<\/time><span class=\"gtb_text-wrappers_update_head\">\u0410\u043f\u0434\u0435\u0439\u0442: <\/span><\/p>\n<p>Binance representatives, in ForkLog comments, said the pool was running the new Geth client version and does not support the wrong chain.<\/p>\n<\/div>\n<\/div>\n<p>The Svende version was confirmed by The Block\u2019s analytics. They noted that the reorganisation resulted from exploitation of the bug by an unknown attacker. It also affects other EVM-compatible chains, such as Polygon, Binance Smart Chain (BSC), xDAI, G\u00f6rli.<\/p>\n<p>The lead developer of the DeFi project yEarn.Finance, under the alias banteg, urged not to carry out \u201cany economically significant transactions\u201d until the situation is resolved.<\/p>\n<blockquote class=\"twitter-tweet\">\n<p lang=\"en\" dir=\"ltr\">Now that exploit is in the wild, it can be replayed on other networks like Polygon, BSC, xDAI, G\u00f6rli. Be careful, try not to do any economically significant transactions before things are cleared out.<\/p>\n<p>\u2014 banteg (@bantg) <a href=\\\"https:\/\/twitter.com\/bantg\/status\/1431263170878967811?ref_src=twsrc%5Etfw\\\">August 27, 2021<\/a><\/p><\/blockquote>\n<p> <script async=\\\"\" src=\\\"https:\/\/platform.twitter.com\/widgets.js\\\" charset=\\\"utf-8\\\"><\/script><\/p>\n<p>The Block researcher Igor Igamberdiev suggested the issue also affected BSC. Some node operators reported synchronization difficulties.<\/p>\n<blockquote class=\"twitter-tweet\" data-conversation=\"none\">\n<p lang=\"\");} \n\n","protected":false},"excerpt":{"rendered":"<p>An Ethereum network-wide large-scale block reorganisation was recorded (over 450, per Blockchair and Etherscan). The bug affected Geth v1.10.7 and earlier.<\/p>\n","protected":false},"author":1,"featured_media":48445,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"select":"1","news_style_id":"1","cryptorium_level":"","_short_excerpt_text":"","creation_source":"","_metatest_mainpost_news_update":false,"footnotes":""},"categories":[3],"tags":[1301,46],"class_list":["post-48444","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news-and-analysis","tag-blockchain-vulnerabilities","tag-ethereum"],"aioseo_notices":[],"amp_enabled":true,"views":"16","promo_type":"1","layout_type":"1","short_excerpt":"","is_update":"","_links":{"self":[{"href":"https:\/\/u1f987.com\/en\/wp-json\/wp\/v2\/posts\/48444","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/u1f987.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/u1f987.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/u1f987.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/u1f987.com\/en\/wp-json\/wp\/v2\/comments?post=48444"}],"version-history":[{"count":1,"href":"https:\/\/u1f987.com\/en\/wp-json\/wp\/v2\/posts\/48444\/revisions"}],"predecessor-version":[{"id":48446,"href":"https:\/\/u1f987.com\/en\/wp-json\/wp\/v2\/posts\/48444\/revisions\/48446"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/u1f987.com\/en\/wp-json\/wp\/v2\/media\/48445"}],"wp:attachment":[{"href":"https:\/\/u1f987.com\/en\/wp-json\/wp\/v2\/media?parent=48444"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/u1f987.com\/en\/wp-json\/wp\/v2\/categories?post=48444"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/u1f987.com\/en\/wp-json\/wp\/v2\/tags?post=48444"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}