{"id":56425,"date":"2024-06-28T05:07:13","date_gmt":"2024-06-28T05:07:13","guid":{"rendered":"https:\/\/www.threatshub.org\/blog\/polyfill-io-owner-punches-back-at-malicious-defamation-amid-domain-shutdown\/"},"modified":"2024-06-28T05:07:13","modified_gmt":"2024-06-28T05:07:13","slug":"polyfill-io-owner-punches-back-at-malicious-defamation-amid-domain-shutdown","status":"publish","type":"post","link":"https:\/\/www.threatshub.org\/blog\/polyfill-io-owner-punches-back-at-malicious-defamation-amid-domain-shutdown\/","title":{"rendered":"Polyfill.io owner punches back at &#8216;malicious defamation&#8217; amid domain shutdown"},"content":{"rendered":"<p>After having its website shut down, the polyfill.io owner is fighting back against claims it smuggled suspicious code onto websites all across the internet.<\/p>\n<p>In a series of angry Xeets over the past three days, what&#8217;s likely the CDN operator that owns the Polyfill service accused Cloudflare, the media, and others of &#8220;malicious defamation&#8221; and &#8220;<a target=\"_blank\" rel=\"nofollow noopener\" href=\"https:\/\/x.com\/Polyfill_Global\/status\/1805707089672815039\">slander<\/a>.&#8221;&nbsp;<\/p>\n<p>&#8220;We have no supply chain risks,&#8221; the org <a target=\"_blank\" rel=\"nofollow noopener\" href=\"https:\/\/x.com\/Polyfill_Global\/status\/1805923380857897277\">claimed<\/a> in one of several posts.<\/p>\n<p>The angry missives follow <a target=\"_blank\" href=\"https:\/\/www.theregister.com\/2024\/06\/25\/polyfillio_china_crisis\/\" rel=\"noopener\">multiple warnings<\/a> from experts in the computer security industry \u2014 and even the <a target=\"_blank\" rel=\"nofollow noopener\" href=\"https:\/\/x.com\/triblondon\/status\/1761852117579427975\">creator<\/a> of the open source Polyfill service project \u2014 telling anyone with a website using any JavaScript code from the polyfill.io domain to immediately remove it.<\/p>\n<p>Following all that criticism, domain registrar Namecheap shut down polyfill.io.&nbsp;The site has since relaunched as polyfill[.]com, billed as a &#8220;free CDN for open source projects.&#8221;<\/p>\n<div aria-hidden=\"true\" class=\"adun\" data-pos=\"top\" data-raptor=\"condor\" data-xsm=\",fluid,mpu,\" data-sm=\",fluid,mpu,\" data-md=\",fluid,mpu,\"> <noscript> <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/research&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=2&amp;c=2Zn5UT5oVyz0If5ld7NJE3QAAA48&amp;t=ct%3Dns%26unitnum%3D2%26raptor%3Dcondor%26pos%3Dtop%26test%3D0\" target=\"_blank\" rel=\"noopener\"> <img decoding=\"async\" src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/research&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=2&amp;c=2Zn5UT5oVyz0If5ld7NJE3QAAA48&amp;t=ct%3Dns%26unitnum%3D2%26raptor%3Dcondor%26pos%3Dtop%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<p>Back in February, CDN operator Funnull bought the .io domain and its associated GitHub account. Sometime after that, polyfill.io was caught sneaking naughty code onto sites in a supply-chain attack, according to e-commerce security outfit Sansec. More than <a target=\"_blank\" rel=\"nofollow noopener\" href=\"https:\/\/publicwww.com\/websites\/%22cdn.polyfill.io%22\/\">100,000 websites<\/a> were at the start of the week carrying the site&#8217;s scripts, the Sansec forensic team said.<\/p>\n<div aria-hidden=\"true\" class=\"adun\" data-pos=\"top\" data-raptor=\"falcon\" data-xmd=\",fluid,mpu,leaderboard,\" data-lg=\",fluid,mpu,leaderboard,\" data-xlg=\",fluid,billboard,superleaderboard,mpu,leaderboard,\" data-xxlg=\",fluid,billboard,superleaderboard,brandwidth,brandimpact,leaderboard,mpu,\"> <noscript> <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/research&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44Zn5UT5oVyz0If5ld7NJE3QAAA48&amp;t=ct%3Dns%26unitnum%3D4%26raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" target=\"_blank\" rel=\"noopener\"> <img decoding=\"async\" src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/research&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44Zn5UT5oVyz0If5ld7NJE3QAAA48&amp;t=ct%3Dns%26unitnum%3D426raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<div class=\"adun_eagle_desktop_story_wrapper\">\n<div aria-hidden=\"true\" class=\"adun\" data-pos=\"mid\" data-raptor=\"eagle\" data-xxlg=\",mpu,dmpu,\"> <noscript> <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/research&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=3&amp;c=33Zn5UT5oVyz0If5ld7NJE3QAAA48&amp;t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0\" target=\"_blank\" rel=\"noopener\"> <img decoding=\"async\" src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/research&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=3&amp;c=33Zn5UT5oVyz0If5ld7NJE3QAAA48&amp;t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<\/p><\/div>\n<p>We should note Funnull claims to be based in Slovenia while also &#8220;made in the USA,&#8221; its various office addresses around the world on its main website don&#8217;t exist, and its WhatsApp and WeChat contact number is in the Philippines. The site&#8217;s underlying language and Telegram profile is in Mandarin, leading many to suspect the business is some kind of Chinese entity or is targeting Chinese customers. The Polyfill Twitter account meanwhile says it&#8217;s based in the UK.<\/p>\n<p>What&#8217;s more, a Chinese-language outfit called ACB Group that advertises a range of web products, from CDNs to adult live-streaming video technology, may be the parent of Funnull as ACB <a target=\"_blank\" rel=\"nofollow noopener\" href=\"https:\/\/acb.bet\/product\/cdn\">offers<\/a> Funnull as a CDN solution. One of Funnull&#8217;s side sites also gives a real address in Manila, which may be where at least some of the team works.<\/p>\n<p>Following the domain&#8217;s sale in February, Cloudflare warned about it posing a supply-chain risk: Whoever controlled the .io could change the JavaScript code it offered to malicious scripts and infect a ton of sites all in one go. By Wednesday, Cloudflare said those worries had become a reality, and reported the Polyfill.io service was being used to inject malicious code into browsers.<\/p>\n<p>Specifically, according to Cloudflare, &#8220;the polyfill.io service was being used to inject nefarious code that, under certain circumstances, redirected users to other websites.&#8221; Sansec went into more detail in <a target=\"_blank\" rel=\"nofollow noopener\" href=\"https:\/\/sansec.io\/research\/polyfill-supply-chain-attack\">an earlier write-up<\/a>, noting:<\/p>\n<p>&#8220;This is a real threat to the internet at large given the popularity of this library,&#8221; Cloudflare CEO and co-founder Matthew Prince <a target=\"_blank\" rel=\"nofollow noopener\" href=\"https:\/\/blog.cloudflare.com\/automatically-replacing-polyfill-io-links-with-cloudflares-mirror-for-a-safer-internet\">noted<\/a> in an advisory on Wednesday along with CTO John Graham-Cumming and senior director Michael Tremante.&nbsp;<\/p>\n<p>The cloud giant also spun up an automatic JavaScript URL rewriting service to make it easier for any Cloudflare-proxied websites to replace code from polyfill.io with that from <a href=\"https:\/\/cdnjs.cloudflare.com\/polyfill\/\" rel=\"nofollow\">Cloudflare&#8217;s mirror<\/a>.<\/p>\n<div aria-hidden=\"true\" class=\"adun\" data-pos=\"top\" data-raptor=\"falcon\" data-xsm=\",fluid,mpu,\" data-sm=\",fluid,mpu,\" data-md=\",fluid,mpu,\"> <noscript> <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/research&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44Zn5UT5oVyz0If5ld7NJE3QAAA48&amp;t=ct%3Dns%26unitnum%3D4%26raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" target=\"_blank\" rel=\"noopener\"> <img decoding=\"async\" src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/research&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44Zn5UT5oVyz0If5ld7NJE3QAAA48&amp;t=ct%3Dns%26unitnum%3D426raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" alt> <\/a> <\/noscript> <\/div>\n<p>&#8220;This will avoid breaking site functionality while mitigating the risk of a supply chain attack,&#8221; the trio wrote.&nbsp;This feature has already activated on any website with a free plan, and paid-plans can turn it on with one click.<\/p>\n<p>On Thursday, again via X\/Twitter, whoever is behind the Polyfill service <a target=\"_blank\" rel=\"nofollow noopener\" href=\"https:\/\/x.com\/Polyfill_Global\/status\/1806303137034330231\">responded<\/a>, describing Cloudflare&#8217;s actions as &#8220;deplorable.&#8221;<\/p>\n<p>&#8220;Moving forward, I will be fully dedicated to developing a global CDN product that surpasses Cloudflare, showcasing the true power of capital,&#8221; they added. The site owner claimed to have $50 million in funding, and added &#8220;the product design has been finalized.&#8221; \u00ae<\/p>\n<p> READ MORE <a href=\"https:\/\/go.theregister.com\/feed\/www.theregister.com\/2024\/06\/28\/polyfillio_cloudflare_malware\/\">HERE<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>No supply-chain attacks to see over here! After having its website shut down, the polyfill.io owner is fighting back against claims it smuggled suspicious code onto websites all across the internet.\u2026 READ MORE HERE&#8230;<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_layout":"default_layout","footnotes":""},"categories":[63],"tags":[],"class_list":["post-56425","post","type-post","status-publish","format-standard","hentry","category-the-register"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Polyfill.io owner punches back at &#039;malicious defamation&#039; amid domain shutdown 2026 | ThreatsHub Cybersecurity News<\/title>\n<meta name=\"description\" content=\"ThreatsHub Cybersecurity News | ThreatsHub.org | Cloud Security &amp; Cyber Threats Analysis Hub. 100% Free OSINT Threat Intelligent and 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