{"id":310,"date":"2015-03-11T23:21:04","date_gmt":"2015-03-11T23:21:04","guid":{"rendered":"http:\/\/www.nortonsecurityonline.com\/kb-faq\/?post_type=ht_kb&#038;p=310"},"modified":"2025-04-07T10:50:31","modified_gmt":"2025-04-07T18:50:31","slug":"what-is-heartbleed","status":"publish","type":"ht_kb","link":"https:\/\/www.antivirusaz.com\/faq\/art\/what-is-heartbleed\/","title":{"rendered":"What is Heartbleed?"},"content":{"rendered":"<p><strong>Heartbleed<\/strong> is a serious vulnerability in OpenSSL, an open-source implementation of the SSL\/TLS encryption used to secure the Internet. This vulnerability allows hackers to access sensitive data, eavesdrop on communications, and possibly impersonate services and users on web servers that use OpenSSL.<\/p>\n<p>More information and online tools:<\/p>\n<ul>\n<li><a href=\"https:\/\/us-cert.cisa.gov\/ncas\/alerts\/TA14-098A\" target=\"_blank\" rel=\"noopener noreferrer\">OpenSSL &#8216;Heartbleed&#8217; vulnerability<\/a> (CISA)<\/li>\n<li><a href=\"https:\/\/safeweb.norton.com\/heartbleed\" target=\"_blank\" rel=\"noopener noreferrer\">Check a URL to see if a site is vulnerable to the Heartbleed attack<\/a> (Norton SafeWeb)<\/li>\n<li><a href=\"https:\/\/heartbleed.com\/\" target=\"_blank\" rel=\"noopener noreferrer\">The Heartbleed Bug<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Heartbleed is a serious vulnerability in OpenSSL, an open-source implementation of the SSL\/TLS encryption used to secure the Internet. This vulnerability allows hackers to access sensitive data, eavesdrop on communications, and possibly impersonate services and users on web servers that use OpenSSL. More information and online tools: OpenSSL &#8216;Heartbleed&#8217; vulnerability (CISA) Check a URL to [&hellip;]<\/p>\n","protected":false},"author":4,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"footnotes":""},"ht-kb-category":[304,12],"ht-kb-tag":[],"class_list":["post-310","ht_kb","type-ht_kb","status-publish","format-standard","hentry","ht_kb_category-norton","ht_kb_category-threats-vulnerabilities"],"blocksy_meta":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What is Heartbleed?<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.antivirusaz.com\/faq\/art\/what-is-heartbleed\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is Heartbleed?\" \/>\n<meta property=\"og:description\" content=\"Heartbleed is a serious vulnerability in OpenSSL, an open-source implementation of the SSL\/TLS encryption used to secure the Internet. 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