{"id":7013,"date":"2022-01-26T22:32:07","date_gmt":"2022-01-26T22:32:07","guid":{"rendered":"https:\/\/mailinvest.blog\/index.php\/2022\/01\/26\/lets-encrypt-to-revoke-about-2-million-https-certificates-the-register\/"},"modified":"2022-01-26T22:32:07","modified_gmt":"2022-01-26T22:32:07","slug":"lets-encrypt-to-revoke-about-2-million-https-certificates-the-register","status":"publish","type":"post","link":"https:\/\/mailinvest.blog\/index.php\/2022\/01\/26\/lets-encrypt-to-revoke-about-2-million-https-certificates-the-register\/","title":{"rendered":"Let&#8217;s Encrypt to revoke about 2 million HTTPS certificates \u2022 The Register"},"content":{"rendered":"<p> <a href=\"https:\/\/go.fiverr.com\/visit\/?bta=1052423&nci=17043\" Target=\"_Top\"><img loading=\"lazy\" decoding=\"async\" border=\"0\" src=\"https:\/\/mailinvest.blog\/wp-content\/themes\/breek\/assets\/images\/transparent.gif\" data-lazy=\"true\" data-src=\"https:\/\/fiverr.ck-cdn.com\/tn\/serve\/?cid=40081059\"  width=\"601\" height=\"201\"><\/a>\n<\/p>\n<div id=\"body\">\n<p>Let&#8217;s Encrypt, a non-profit organization that helps people obtain free SSL\/TLS certificates for websites, plans to revoke a non-trivial number of its certs on Friday because they were improperly issued.<\/p>\n<p>In <a href=\"https:\/\/community.letsencrypt.org\/t\/2022-01-25-issue-with-tls-alpn-01-validation-method\/170450\" rel=\"nofollow\">a post<\/a> to the Let&#8217;s Encrypt discussion community forum, site reliability engineer Jillian Tessa explained that on Tuesday, a third party reported &#8220;two irregularities&#8221; in the code implementing the &#8220;TLS Using ALPN&#8221; validation method (BRs 3.2.2.4.20, RFC 8737) in Boulder, its Automatic Certificate Management Environment (ACME) software.<\/p>\n<p>&#8220;All active certificates that were issued and validated with the TLS-ALPN-01 challenge before 0048 UTC on 26 January 2022 when our fix was deployed are considered mis-issued,&#8221; explained Tessa. &#8220;In compliance with the Let&#8217;s Encrypt CP [Certificate Policy], we have 5-days to revoke and will begin to revoke certificates at 1600 UTC on 28 January 2022.&#8221;\u00a0<\/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,\">\n        <noscript><br \/>\n            <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=2&amp;c=2YfHL5kOabpbIyhdGAYqMPgAAAIw&amp;t=ct%3Dns%26unitnum%3D2%26raptor%3Dcondor%26pos%3Dtop%26test%3D0\" target=\"_blank\" rel=\"noopener\"><br \/>\n                <img decoding=\"async\" src=\"https:\/\/mailinvest.blog\/wp-content\/themes\/breek\/assets\/images\/transparent.gif\" data-lazy=\"true\" data-src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=2&amp;c=2YfHL5kOabpbIyhdGAYqMPgAAAIw&amp;t=ct%3Dns%26unitnum%3D2%26raptor%3Dcondor%26pos%3Dtop%26test%3D0\" alt=\"\"\/><\/a><br \/>\n        <\/noscript>\n    <\/div>\n<p>Let&#8217;s Encrypt estimates that less than one per cent of active certificates are affected; this is still a large number \u2013 about two million, according to a spokesperson \u2013 given that there are currently about <a href=\"https:\/\/letsencrypt.org\/stats\/\" rel=\"nofollow\">221 million<\/a> active Let&#8217;s Encrypt-issued certificates.<\/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,\">\n            <noscript><br \/>\n                <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44YfHL5kOabpbIyhdGAYqMPgAAAIw&amp;t=ct%3Dns%26unitnum%3D4%26raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" target=\"_blank\" rel=\"noopener\"><br \/>\n                    <img decoding=\"async\" src=\"https:\/\/mailinvest.blog\/wp-content\/themes\/breek\/assets\/images\/transparent.gif\" data-lazy=\"true\" data-src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44YfHL5kOabpbIyhdGAYqMPgAAAIw&amp;t=ct%3Dns%26unitnum%3D426raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" alt=\"\"\/><\/a><br \/>\n            <\/noscript>\n        <\/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,\">\n                <noscript><br \/>\n                    <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=3&amp;c=33YfHL5kOabpbIyhdGAYqMPgAAAIw&amp;t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0\" target=\"_blank\" rel=\"noopener\"><br \/>\n                        <img decoding=\"async\" src=\"https:\/\/mailinvest.blog\/wp-content\/themes\/breek\/assets\/images\/transparent.gif\" data-lazy=\"true\" data-src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=3&amp;c=33YfHL5kOabpbIyhdGAYqMPgAAAIw&amp;t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0\" alt=\"\"\/><\/a><br \/>\n                <\/noscript>\n            <\/div>\n<\/p><\/div>\n<p>Affected certificate holders will be notified of the revocation by email, at which point <a href=\"https:\/\/community.letsencrypt.org\/t\/questions-about-renewing-before-tls-alpn-01-revocations\/170449\" rel=\"nofollow\">certificate renewal<\/a> will be necessary.<\/p>\n<p>This is not the remediation of an exploit. &#8220;The update to the TLS-ALPN-01 challenge type was made to be in compliance with the Baseline Requirements, which requires use of TLS 1.2 or higher,&#8221; a spokesperson for Let&#8217;s Encrypt told <em>The Register<\/em> in an email.<\/p>\n<p>When you get a certificate from Let&#8217;s Encrypt, the organization&#8217;s servers attempt to validate that you have control over the relevant resources by presenting a challenge, per the ACME standard. This challenge may be conducted using HTTP, DNS, or TLS, depending upon what works or doesn&#8217;t work with the client setup. It&#8217;s similar in concept to sending an email verification link that must be clicked to complete the setup of an online account.\u00a0<\/p>\n<p>The TLS-ALPN-01 challenge is available for those unable or unwilling to use port 80 for an HTTP-01 challenge. According to Let&#8217;s Encrypt, &#8220;It is best suited to authors of TLS-terminating reverse proxies that want to perform host-based validation like HTTP-01, but want to do it entirely at the TLS layer in order to separate concerns.&#8221;<\/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,\">\n            <noscript><br \/>\n                <a href=\"https:\/\/pubads.g.doubleclick.net\/gampad\/jump?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44YfHL5kOabpbIyhdGAYqMPgAAAIw&amp;t=ct%3Dns%26unitnum%3D4%26raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" target=\"_blank\" rel=\"noopener\"><br \/>\n                    <img decoding=\"async\" src=\"https:\/\/mailinvest.blog\/wp-content\/themes\/breek\/assets\/images\/transparent.gif\" data-lazy=\"true\" data-src=\"https:\/\/pubads.g.doubleclick.net\/gampad\/ad?co=1&amp;iu=\/6978\/reg_security\/front&amp;sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&amp;tile=4&amp;c=44YfHL5kOabpbIyhdGAYqMPgAAAIw&amp;t=ct%3Dns%26unitnum%3D426raptor%3Dfalcon%26pos%3Dmid%26test%3D0\" alt=\"\"\/><\/a><br \/>\n            <\/noscript>\n        <\/div>\n<p>Let&#8217;s Encrypt developer Aaron Gable said in a separate <a href=\"https:\/\/community.letsencrypt.org\/t\/changes-to-tls-alpn-01-challenge-validation\/170427\" rel=\"nofollow\">post<\/a> that two changes were made to the organization&#8217;s verification code affecting client applications that specifically use TLS-ALPN-01. First, the software now <a href=\"https:\/\/github.com\/letsencrypt\/boulder\/pull\/5905\" rel=\"nofollow\">enforces network negotiation using TLS 1.2 or higher<\/a>. Previously the code allowed connections over TLS 1.1, which is now considered to be <a href=\"https:\/\/docs.microsoft.com\/en-us\/lifecycle\/announcements\/transport-layer-security-1x-disablement\" rel=\"nofollow\">insecure<\/a>.<\/p>\n<p>Second, the software no longer supports the legacy OID (Object Identifier) 1.3.6.1.5.5.7.1.30.1, which served to identify the &#8220;acmeIdentifier&#8221; extension in early versions of <a href=\"https:\/\/datatracker.ietf.org\/doc\/html\/rfc8737\" rel=\"nofollow\">RFC 8737<\/a>. The Let&#8217;s Encrypt software now only accepts the standardized OID 1.3.6.1.5.5.7.1.31.<\/p>\n<p>Certificate verification attempts using TLS 1.1 or the discontinued OID will fail under the revised software; those certificates verified via TLS-ALPN-01 under the old code fail to comply with <a href=\"https:\/\/letsencrypt.org\/repository\/\" rel=\"nofollow\">Let&#8217;s Encrypt policy<\/a> and thus need to be reissued. \u00ae<\/p>\n<\/p><\/div>\n<iframe data-lazy=\"true\" data-src=\"https:\/\/www.fiverr.com\/gig_widgets?id=U2FsdGVkX18x7XQvttUTrv1oEqmGNGTgvvCUiUoJ\/AP4z\/UyMz8lXGOLpu15jIMxBbTR0gmD5uBoFvhC4KWeALQRp3h\/X\/AwcVD0K8Wj9H\/ZzYKzcCNHosB9oS4SCJJFWiN85P9ICAc4OgCoE\/wHKIY7CDkf2\/DQ1vqGvk4smVe5cRDEmrLPCWi4FC8p40VUhSmWQ5udCm0zoJtorgWv3vbDQw0kKYkwn39ozAnQXDe+YvWMxkLFWA+O3TFwkJvdkIK+\/AUSnRssPKt5WHY0FhNOxnSPcLslEL4G4\/RfP95ve99U+kRnDy3X+KtzdQLY+u935ghON\/o3UE4IMv9oN6JX9RnxzL\/LRcOgnHigxStSGPKsZYtnz8RWNVT\/rOLAibqiWJadC5MYHRbekF3eg6FOGrQGkXYbsn0+a5aovnlLCbLwIqY9fcS17UX8J235iQ6cdmHNbrPeS84CMm34RA==&affiliate_id=1052423&strip_google_tagmanager=true\" loading=\"lazy\" data-with-title=\"true\" class=\"fiverr_nga_frame\" frameborder=\"0\" height=\"350\" width=\"100%\" referrerpolicy=\"no-referrer-when-downgrade\" data-mode=\"random_gigs\" onload=\" var frame = this; var script = document.createElement('script'); script.addEventListener('load', function() { window.FW_SDK.register(frame); }); script.setAttribute('src', 'https:\/\/www.fiverr.com\/gig_widgets\/sdk'); document.body.appendChild(script); \" ><\/iframe>\n<br \/><a href=\"https:\/\/go.theregister.com\/feed\/www.theregister.com\/2022\/01\/26\/lets_encrypt_certificates\/\">Source link <\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Let&#8217;s Encrypt, a non-profit organization that helps people obtain free SSL\/TLS certificates for websites, plans to revoke a non-trivial number of its certs on Friday&#8230;<\/p>\n","protected":false},"author":1,"featured_media":7014,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-7013","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tech-universe"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Let&#039;s Encrypt to revoke about 2 million HTTPS certificates \u2022 The Register - mailinvest.blog<\/title>\n<meta name=\"description\" content=\"Technology is forever changing, and there are always new pieces of technology to replace obsolete ones. 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