{"id":20349,"date":"2025-04-09T12:25:38","date_gmt":"2025-04-09T12:25:38","guid":{"rendered":""},"modified":"2025-10-22T01:49:28","modified_gmt":"2025-10-22T07:49:28","slug":"cve-2023-42866-critical-memory-corruption-vulnerability-in-apples-webkit-engine","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2023-42866-critical-memory-corruption-vulnerability-in-apples-webkit-engine\/","title":{"rendered":"CVE-2023-42866<strong>:<\/strong> Critical Memory Corruption Vulnerability in Apple&#8217;s WebKit Engine"},"content":{"rendered":"<p class=\"\" data-start=\"0\" data-end=\"126\"><span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">CVE-2023-42866 is a critical memory corruption vulnerability in Apple&#8217;s WebKit engine, which could allow arbitrary code execution when processing malicious web content.<\/span> <span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">This issue affects multiple Apple products and has been addressed in recent security updates.<\/span>\u200b<\/p>\n<p class=\"\" data-start=\"133\" data-end=\"158\"><strong data-start=\"133\" data-end=\"158\">Vulnerability Summary<\/strong><\/p>\n<ul data-start=\"160\" data-end=\"777\">\n<li class=\"\" data-start=\"160\" data-end=\"255\">\n<p class=\"\" data-start=\"162\" data-end=\"255\"><strong data-start=\"162\" data-end=\"173\">CVE ID:<\/strong> <span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">CVE-2023-42866<\/span>\u200b<\/p>\n<\/li>\n<li class=\"\" data-start=\"256\" data-end=\"353\">\n<p class=\"\" data-start=\"258\" data-end=\"353\"><strong data-start=\"258\" data-end=\"271\">Severity:<\/strong> <span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">Critical<\/span>\u200b<span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem]\"><a class=\"flex h-6 overflow-hidden rounded-xl px-2.5 text-[0.5625em] font-medium text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/support.apple.com\/en-us\/120324?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative bottom-0 left-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">Tenable\u00ae<\/span><span class=\"ms-1 -me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">Apple Support<\/span><span class=\"ms-1 -me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">NVD<\/span><span class=\"ms-1 -me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/p>\n<\/li>\n<li class=\"\" data-start=\"354\" data-end=\"456\">\n<p class=\"\" data-start=\"356\" data-end=\"456\"><strong data-start=\"356\" data-end=\"374\">Attack Vector:<\/strong> <span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">Network<\/span>\u200b<\/p>\n<\/li>\n<li class=\"\" data-start=\"457\" data-end=\"567\">\n<p class=\"\" data-start=\"459\" data-end=\"567\"><strong data-start=\"459\" data-end=\"483\">Privileges Required:<\/strong> <span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">None<\/span>\u200b<\/p>\n<\/li>\n<li class=\"\" data-start=\"568\" data-end=\"677\">\n<p class=\"\" data-start=\"570\" data-end=\"677\"><strong data-start=\"570\" data-end=\"591\">User Interaction:<\/strong> <span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">Required<\/span>\u200b<\/p>\n<\/li>\n<li class=\"\" data-start=\"678\" data-end=\"777\">\n<p class=\"\" data-start=\"680\" data-end=\"777\"><strong data-start=\"680\" data-end=\"691\">Impact:<\/strong> <span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">Arbitrary code execution<\/span>\u200b<span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem]\"><a class=\"flex h-6 overflow-hidden rounded-xl px-2.5 text-[0.5625em] font-medium text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/support.apple.com\/en-us\/120331?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative bottom-0 left-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">NVD<\/span><span class=\"ms-1 -me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+4<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">Apple Support<\/span><span class=\"ms-1 -me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+4<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">Apple Support<\/span><span class=\"ms-1 -me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+4<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<\/ul>\n<p class=\"\" data-start=\"784\" data-end=\"805\"><strong data-start=\"784\" data-end=\"805\">Affected Products<\/strong><\/p>\n<ul data-start=\"807\" data-end=\"1409\">\n<li class=\"\" data-start=\"807\" data-end=\"913\">\n<p class=\"\" data-start=\"809\" data-end=\"913\"><strong data-start=\"809\" data-end=\"827\">macOS Ventura:<\/strong> <span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">Versions before 13.5<\/span>\u200b<span class=\"\" data-state=\"closed\"><span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem]\"><a class=\"flex h-6 overflow-hidden rounded-xl px-2.5 text-[0.5625em] font-medium text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/nvd.nist.gov\/vuln\/detail\/CVE-2023-42866?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative bottom-0 left-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">Tenable\u00ae<\/span><span class=\"ms-1 -me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+3<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">NVD<\/span><span class=\"ms-1 -me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+3<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">CVE<\/span><span class=\"ms-1 -me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+3<\/span><\/span><\/span><\/a><\/span><\/span><\/p>\n<\/li>\n<li class=\"\" data-start=\"914\" data-end=\"1010\">\n<p class=\"\" data-start=\"916\" data-end=\"1010\"><strong data-start=\"916\" data-end=\"924\">iOS:<\/strong> <span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">Versions before 16.6<\/span>\u200b<span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem]\"><a class=\"flex h-6 overflow-hidden rounded-xl px-2.5 text-[0.5625em] font-medium text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.tenable.com\/plugins\/nessus\/178902\/changelog?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative bottom-0 left-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">NVD<\/span><span class=\"ms-1 -me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+4<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">Tenable\u00ae<\/span><span class=\"ms-1 -me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+4<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">CVE<\/span><span class=\"ms-1 -me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+4<\/span><\/span><\/span><\/a><\/span><\/p>\n<\/li>\n<li class=\"\" data-start=\"1011\" data-end=\"1110\">\n<p class=\"\" data-start=\"1013\" data-end=\"1110\"><strong data-start=\"1013\" data-end=\"1024\">iPadOS:<\/strong> <span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">Versions before 16.6<\/span>\u200b<\/p>\n<\/li>\n<li class=\"\" data-start=\"1111\" data-end=\"1208\">\n<p class=\"\" data-start=\"1113\" data-end=\"1208\"><strong data-start=\"1113\" data-end=\"1122\">tvOS:<\/strong> <span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">Versions before 16.6<\/span>\u200b<\/p>\n<\/li>\n<li class=\"\" data-start=\"1209\" data-end=\"1309\">\n<p class=\"\" data-start=\"1211\" data-end=\"1309\"><strong data-start=\"1211\" data-end=\"1223\">watchOS:<\/strong> <span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">Versions before 9.6<\/span>\u200b<span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem]\"><a class=\"flex h-6 overflow-hidden rounded-xl px-2.5 text-[0.5625em] font-medium text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/cve.mitre.org\/cgi-bin\/cvename.cgi?name=CVE-2023-42866&amp;utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative bottom-0 left-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between overflow-hidden\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">CVE<\/span><\/span><\/span><\/a><\/span><\/p>\n<\/li>\n<li class=\"\" data-start=\"1310\" data-end=\"1409\">\n<p class=\"\" data-start=\"1312\" data-end=\"1409\"><strong data-start=\"1312\" data-end=\"1323\">Safari:<\/strong> <span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">Versions before 16.6<\/span>\u200b<span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem]\"><a class=\"flex h-6 overflow-hidden rounded-xl px-2.5 text-[0.5625em] font-medium text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/support.apple.com\/en-us\/120324?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative bottom-0 left-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">Apple Support<\/span><span class=\"ms-1 -me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">NVD<\/span><span class=\"ms-1 -me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/p>\n<\/li>\n<\/ul>\n<p class=\"\" data-start=\"1416\" data-end=\"1441\"><strong data-start=\"1416\" data-end=\"1441\">How the Exploit Works<\/strong><\/p>\n<p class=\"\" data-start=\"1443\" data-end=\"1608\"><span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-48253-critical-memory-corruption-vulnerability-in-linux-kernel\/\"  data-wpil-monitor-id=\"25794\">vulnerability resides in the WebKit engine&#8217;s memory<\/a> handling mechanisms.<\/span> <span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">An attacker can craft a malicious web page that, when visited by a user, triggers <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-47994-a-deep-dive-into-the-critical-memory-corruption-vulnerability\/\"  data-wpil-monitor-id=\"25563\">memory corruption<\/a> in the browser&#8217;s rendering process.<\/span> <span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">This corruption can lead to arbitrary <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-21625-critical-remote-code-execution-vulnerability-in-network-protocol\/\"  data-wpil-monitor-id=\"24239\">code execution<\/a>, allowing the attacker to run malicious code on the affected device.<\/span>\u200b<span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem]\"><a class=\"flex h-6 overflow-hidden rounded-xl px-2.5 text-[0.5625em] font-medium text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/nvd.nist.gov\/vuln\/detail\/CVE-2023-42866?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative bottom-0 left-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between overflow-hidden\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">NVD<\/span><\/span><\/span><\/a><\/span><\/p>\n<p class=\"\" data-start=\"1615\" data-end=\"1642\"><strong data-start=\"1615\" data-end=\"1642\">Conceptual Example Code<\/strong><\/p>\n<p class=\"\" data-start=\"1644\" data-end=\"1729\"><span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">While specific exploit code is not publicly available, a conceptual example of how such an attack might be structured is as follows:<\/span>\u200b<\/p>\n<div class=\"contain-inline-size rounded-md border-[0.5px] border-token-border-medium relative bg-token-sidebar-surface-primary\">\n<div class=\"flex items-center text-token-text-secondary px-4 py-2 text-xs font-sans justify-between h-9 bg-token-sidebar-surface-primary dark:bg-token-main-surface-secondary select-none rounded-t-[5px]\">javascript<\/div>\n<div class=\"overflow-y-auto p-4\" dir=\"ltr\"><code class=\"whitespace-pre! language-javascript\"><span class=\"hljs-comment\">\/\/ Malicious JavaScript <a class=\"wpil_keyword_link\" href=\"https:\/\/www.ameeba.com\"   title=\"payload\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"24167\">payload<\/a><\/span><br \/>\n<span class=\"hljs-keyword\">let<\/span> buffer = <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">ArrayBuffer<\/span>(<span class=\"hljs-number\">1024<\/span>);<br \/>\n<span class=\"hljs-keyword\">let<\/span> view = <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">DataView<\/span>(buffer);<br \/>\n<span class=\"hljs-keyword\">for<\/span> (<span class=\"hljs-keyword\">let<\/span> i = <span class=\"hljs-number\">0<\/span>; i &lt; <span class=\"hljs-number\">1024<\/span>; i++) {<br \/>\n    view.<span class=\"hljs-title function_\">setUint8<\/span>(i, <span class=\"hljs-number\">0x41<\/span>); <span class=\"hljs-comment\">\/\/ Fill buffer with 'A's<\/span><br \/>\n}<br \/>\n<span class=\"hljs-comment\">\/\/ Trigger <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-33094-memory-corruption-vulnerability-in-vk-synchronization-with-kasan\/\"  data-wpil-monitor-id=\"30963\">vulnerability in WebKit's memory<\/a> handling<\/span><br \/>\n<span class=\"hljs-title function_\">someVulnerableFunction<\/span>(view);<br \/>\n<\/code><\/div>\n<\/div>\n<p class=\"\" data-start=\"2022\" data-end=\"2061\">\n<p class=\"\" data-start=\"2063\" data-end=\"2148\"><span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">This code represents a generic approach to exploiting memory corruption <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-41288-critical-buffer-overflow-vulnerability-in-openssh\/\"  data-wpil-monitor-id=\"24185\">vulnerabilities by manipulating buffers<\/a> and triggering vulnerable functions.<\/span>\u200b<span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem]\"><a class=\"flex h-6 overflow-hidden rounded-xl px-2.5 text-[0.5625em] font-medium text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.cybersecurity-help.cz\/vdb\/SB2023072440?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative bottom-0 left-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between overflow-hidden\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">CyberSecurity Help<\/span><\/span><\/span><\/a><\/span><\/p>\n<p class=\"\" data-start=\"2155\" data-end=\"2174\"><strong data-start=\"2155\" data-end=\"2174\">Potential Risks<\/strong><\/p>\n<ul data-start=\"2176\" data-end=\"2527\">\n<li class=\"\" data-start=\"2176\" data-end=\"2263\">\n<p class=\"\" data-start=\"2178\" data-end=\"2263\"><span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">Execution of arbitrary code on the affected device<\/span>\u200b<span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem]\"><a class=\"flex h-6 overflow-hidden rounded-xl px-2.5 text-[0.5625em] font-medium text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/www.cybersecurity-help.cz\/vdb\/SB2023072440?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative bottom-0 left-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between overflow-hidden\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">CyberSecurity Help<\/span><\/span><\/span><\/a><\/span><\/p>\n<\/li>\n<li class=\"\" data-start=\"2264\" data-end=\"2351\">\n<p class=\"\" data-start=\"2266\" data-end=\"2351\"><span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">Potential full system compromise<\/span>\u200b<span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem]\"><a class=\"flex h-6 overflow-hidden rounded-xl px-2.5 text-[0.5625em] font-medium text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/support.apple.com\/en-us\/120331?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative bottom-0 left-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">NVD<\/span><span class=\"ms-1 -me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+5<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">Apple Support<\/span><span class=\"ms-1 -me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+5<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">CyberSecurity Help<\/span><span class=\"ms-1 -me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+5<\/span><\/span><\/span><\/a><\/span><\/p>\n<\/li>\n<li class=\"\" data-start=\"2352\" data-end=\"2439\">\n<p class=\"\" data-start=\"2354\" data-end=\"2439\"><span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">Unauthorized <a href=\"https:\/\/www.ameeba.com\/blog\/fortinet-s-fortigate-vulnerability-ssl-vpn-symlink-exploit-puts-user-access-at-risk-post-patching\/\"  data-wpil-monitor-id=\"30964\">access to sensitive user<\/a> data\u200b<\/p>\n<\/li>\n<li class=\"\" data-start=\"2440\" data-end=\"2527\">\n<p class=\"\" data-start=\"2442\" data-end=\"2527\"><span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">Propagation of <a class=\"wpil_keyword_link\" href=\"https:\/\/ameeba.com\"   title=\"malware\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"24169\">malware<\/a> or further exploitation<\/span>\u200b<\/p>\n<\/li>\n<\/ul>\n<p class=\"\" data-start=\"2534\" data-end=\"2564\"><strong data-start=\"2534\" data-end=\"2564\">Mitigation Recommendations<\/strong><\/p>\n<ul data-start=\"2566\" data-end=\"3369\">\n<li class=\"\" data-start=\"2566\" data-end=\"3193\">\n<p class=\"\" data-start=\"2568\" data-end=\"2653\"><span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">Update to the latest versions of affected <a class=\"wpil_keyword_link\" href=\"https:\/\/apps.apple.com\/us\/app\/ameeba-chat\/id1670582506\"   title=\"Apple\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"24170\">Apple<\/a> products:<\/span>\u200b<\/p>\n<ul data-start=\"2656\" data-end=\"3193\">\n<li class=\"\" data-start=\"2656\" data-end=\"2743\">\n<p class=\"\" data-start=\"2658\" data-end=\"2743\"><span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">macOS Ventura 13.5<\/span>\u200b<span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem]\"><a class=\"flex h-6 overflow-hidden rounded-xl px-2.5 text-[0.5625em] font-medium text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/cve.mitre.org\/cgi-bin\/cvename.cgi?name=CVE-2023-42866&amp;utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative bottom-0 left-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">Apple Support<\/span><span class=\"ms-1 -me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">CVE<\/span><span class=\"ms-1 -me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">NVD<\/span><span class=\"ms-1 -me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/p>\n<\/li>\n<li class=\"\" data-start=\"2746\" data-end=\"2833\">\n<p class=\"\" data-start=\"2748\" data-end=\"2833\"><span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">iOS 16.6<\/span>\u200b<span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem]\"><a class=\"flex h-6 overflow-hidden rounded-xl px-2.5 text-[0.5625em] font-medium text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/cve.mitre.org\/cgi-bin\/cvename.cgi?name=CVE-2023-42866&amp;utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative bottom-0 left-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">Tenable\u00ae<\/span><span class=\"ms-1 -me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+3<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">CVE<\/span><span class=\"ms-1 -me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+3<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">NVD<\/span><span class=\"ms-1 -me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+3<\/span><\/span><\/span><\/a><\/span><\/p>\n<\/li>\n<li class=\"\" data-start=\"2836\" data-end=\"2923\">\n<p class=\"\" data-start=\"2838\" data-end=\"2923\"><span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">iPadOS 16.6<\/span>\u200b<span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem]\"><a class=\"flex h-6 overflow-hidden rounded-xl px-2.5 text-[0.5625em] font-medium text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/cve.mitre.org\/cgi-bin\/cvename.cgi?name=CVE-2023-42866&amp;utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative bottom-0 left-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">CyberSecurity Help<\/span><span class=\"ms-1 -me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">CVE<\/span><span class=\"ms-1 -me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">NVD<\/span><span class=\"ms-1 -me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/p>\n<\/li>\n<li class=\"\" data-start=\"2926\" data-end=\"3013\">\n<p class=\"\" data-start=\"2928\" data-end=\"3013\"><span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">tvOS 16.6<\/span>\u200b<span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem]\"><a class=\"flex h-6 overflow-hidden rounded-xl px-2.5 text-[0.5625em] font-medium text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/nvd.nist.gov\/vuln\/detail\/CVE-2023-42866?utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative bottom-0 left-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between overflow-hidden\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">NVD<\/span><\/span><\/span><\/a><\/span><\/p>\n<\/li>\n<li class=\"\" data-start=\"3016\" data-end=\"3103\">\n<p class=\"\" data-start=\"3018\" data-end=\"3103\"><span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">watchOS 9.6<\/span>\u200b<span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem]\"><a class=\"flex h-6 overflow-hidden rounded-xl px-2.5 text-[0.5625em] font-medium text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/cve.mitre.org\/cgi-bin\/cvename.cgi?name=CVE-2023-42866&amp;utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative bottom-0 left-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">NVD<\/span><span class=\"ms-1 -me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">CVE<\/span><span class=\"ms-1 -me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">NVD<\/span><span class=\"ms-1 -me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+2<\/span><\/span><\/span><\/a><\/span><\/p>\n<\/li>\n<li class=\"\" data-start=\"3106\" data-end=\"3193\">\n<p class=\"\" data-start=\"3108\" data-end=\"3193\"><span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">Safari 16.6<\/span>\u200b<span class=\"ms-1 inline-flex max-w-full items-center relative top-[-0.094rem]\"><a class=\"flex h-6 overflow-hidden rounded-xl px-2.5 text-[0.5625em] font-medium text-token-text-secondary! bg-[#F4F4F4]! dark:bg-[#303030]!\" href=\"https:\/\/cve.mitre.org\/cgi-bin\/cvename.cgi?name=CVE-2023-42866&amp;utm_source=chatgpt.com\" target=\"_blank\" rel=\"noopener\"><span class=\"relative bottom-0 left-0 flex h-full w-full items-center\"><span class=\"flex h-4 w-full items-center justify-between\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">CVE<\/span><span class=\"ms-1 -me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><span class=\"flex h-4 w-full items-center justify-between absolute\"><span class=\"max-w-full grow truncate overflow-hidden text-center\">NVD<\/span><span class=\"ms-1 -me-1 flex h-full items-center rounded-full px-1 text-[#8F8F8F]\">+1<\/span><\/span><\/span><\/a><\/span><\/p>\n<\/li>\n<\/ul>\n<\/li>\n<li class=\"\" data-start=\"3194\" data-end=\"3281\">\n<p class=\"\" data-start=\"3196\" data-end=\"3281\"><span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">Avoid visiting untrusted websites or clicking on suspicious links<\/span>\u200b<\/p>\n<\/li>\n<li class=\"\" data-start=\"3282\" data-end=\"3369\">\n<p class=\"\" data-start=\"3284\" data-end=\"3369\"><span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">Enable automatic updates to ensure timely patching of vulnerabilities<\/span>\u200b<\/p>\n<\/li>\n<\/ul>\n<p class=\"\" data-start=\"3376\" data-end=\"3390\"><strong data-start=\"3376\" data-end=\"3390\">Conclusion<\/strong><\/p>\n<p class=\"\" data-start=\"3392\" data-end=\"3517\"><span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">CVE-2023-42866 highlights the importance of promptly applying <a class=\"wpil_keyword_link\" href=\"https:\/\/chat.ameeba.com\"   title=\"security\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"24168\">security<\/a> updates to protect against critical vulnerabilities.<\/span> <span class=\"relative -mx-px my-[-0.2rem] rounded-sm px-px py-[0.2rem]\">Users and administrators should ensure their Apple devices are updated to the latest versions to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-51063-understanding-and-mitigating-a-dom-based-xss-vulnerability-in-qstar-archive-solutions\/\"  data-wpil-monitor-id=\"27064\">mitigate the risks associated with this vulnerability<\/a>.<\/span>\u200b<\/p>\n<p class=\"\" data-start=\"3524\" data-end=\"3538\"><strong data-start=\"3524\" data-end=\"3538\">References<\/strong><\/p>\n<ul data-start=\"3540\" data-end=\"3719\">\n<li class=\"\" data-start=\"3540\" data-end=\"3640\">\n<p class=\"\" data-start=\"3542\" data-end=\"3640\">National Vulnerability Database: <a class=\"\" href=\"https:\/\/nvd.nist.gov\/vuln\/detail\/CVE-2023-42866\" target=\"_new\" rel=\"noopener\" data-start=\"3575\" data-end=\"3640\">CVE-2023-42866<\/a><\/p>\n<\/li>\n<li class=\"\" data-start=\"3641\" data-end=\"3719\">\n<p class=\"\" data-start=\"3643\" data-end=\"3719\">Apple Security Updates: <a class=\"\" href=\"https:\/\/support.apple.com\/en-us\/HT213841\" target=\"_new\" rel=\"noopener\" data-start=\"3667\" data-end=\"3719\">HT213841<\/a><\/p>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>CVE-2023-42866 is a critical memory corruption vulnerability in Apple&#8217;s WebKit engine, which could allow arbitrary code execution when processing malicious web content. This issue affects multiple Apple products and has been addressed in recent security updates.\u200b Vulnerability Summary CVE ID: CVE-2023-42866\u200b Severity: Critical\u200bTenable\u00ae+2Apple Support+2NVD+2 Attack Vector: Network\u200b Privileges Required: None\u200b User Interaction: Required\u200b Impact: Arbitrary [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"vendor":[77],"product":[],"attack_vector":[80],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-20349","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-apple","attack_vector-rce"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"CVE-2023-42866 is a critical memory corruption vulnerability in Apple&#039;s WebKit engine, which could allow arbitrary code execution when processing malicious web content. This issue affects multiple Apple products and has been addressed in recent security updates.\u200b Vulnerability Summary CVE ID: CVE-2023-42866\u200b Severity: Critical\u200bTenable\u00ae+2Apple Support+2NVD+2 Attack Vector: Network\u200b Privileges Required: None\u200b User Interaction: Required\u200b Impact: Arbitrary\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Ameeba\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-42866-critical-memory-corruption-vulnerability-in-apples-webkit-engine\/\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.4\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ameeba Blog - Your Guide to a Safer Digital World.\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"CVE-2023-42866: Critical Memory Corruption Vulnerability in Apple\u2019s WebKit Engine - Ameeba Blog\" \/>\n\t\t<meta property=\"og:description\" content=\"CVE-2023-42866 is a critical memory corruption vulnerability in Apple&#039;s WebKit engine, which could allow arbitrary code execution when processing malicious web content. This issue affects multiple Apple products and has been addressed in recent security updates.\u200b Vulnerability Summary CVE ID: CVE-2023-42866\u200b Severity: Critical\u200bTenable\u00ae+2Apple Support+2NVD+2 Attack Vector: Network\u200b Privileges Required: None\u200b User Interaction: Required\u200b Impact: Arbitrary\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/www.ameeba.com\/blog\/cve-2023-42866-critical-memory-corruption-vulnerability-in-apples-webkit-engine\/\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/www.ameeba.com\/blog\/wp-content\/uploads\/2025\/02\/image-5.png\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/www.ameeba.com\/blog\/wp-content\/uploads\/2025\/02\/image-5.png\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2025-04-09T12:25:38+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2025-10-22T07:49:28+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"CVE-2023-42866: Critical Memory Corruption Vulnerability in Apple\u2019s WebKit Engine - Ameeba Blog\" \/>\n\t\t<meta name=\"twitter:description\" content=\"CVE-2023-42866 is a critical memory corruption vulnerability in Apple&#039;s WebKit engine, which could allow arbitrary code execution when processing malicious web content. This issue affects multiple Apple products and has been addressed in recent security updates.\u200b Vulnerability Summary CVE ID: CVE-2023-42866\u200b Severity: Critical\u200bTenable\u00ae+2Apple Support+2NVD+2 Attack Vector: Network\u200b Privileges Required: None\u200b User Interaction: Required\u200b Impact: Arbitrary\" \/>\n\t\t<meta name=\"twitter:image\" content=\"https:\/\/www.ameeba.com\/blog\/wp-content\/uploads\/2025\/02\/image-5.png\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"BlogPosting\",\"@id\":\"https:\\\/\\\/www.ameeba.com\\\/blog\\\/cve-2023-42866-critical-memory-corruption-vulnerability-in-apples-webkit-engine\\\/#blogposting\",\"name\":\"CVE-2023-42866: Critical Memory Corruption Vulnerability in Apple\\u2019s WebKit Engine - Ameeba Blog\",\"headline\":\"CVE-2023-42866: Critical Memory Corruption Vulnerability in Apple&#8217;s WebKit 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