{"id":69156,"date":"2025-08-31T15:12:13","date_gmt":"2025-08-31T15:12:13","guid":{"rendered":""},"modified":"2025-10-14T23:56:59","modified_gmt":"2025-10-15T05:56:59","slug":"cve-2025-43300-out-of-bounds-write-issue-in-macos-and-ios-resulting-in-memory-corruption","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-43300-out-of-bounds-write-issue-in-macos-and-ios-resulting-in-memory-corruption\/","title":{"rendered":"<strong>CVE-2025-43300: Out-of-Bounds Write Issue in macOS and iOS Resulting in Memory Corruption<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>The world of cybersecurity is a constant battlefield, where new vulnerabilities are discovered and old ones are patched. One such recently discovered vulnerability, CVE-2025-43300, is a critical issue affecting multiple versions of macOS and iOS. This vulnerability, caused by an out-of-bounds write issue, can lead to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-21444-memory-corruption-vulnerability-in-emac-transmission-queue\/\"  data-wpil-monitor-id=\"76772\">memory corruption<\/a> when processing a malicious image file.<br \/>\nThe <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-55293-high-risk-vulnerability-in-meshtastic-s-mesh-networking-solution\/\"  data-wpil-monitor-id=\"81354\">vulnerability is not just a theoretical risk<\/a>. Apple has confirmed that there have been <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-40687-critical-sql-injection-vulnerability-in-online-fire-reporting-system-v1-2\/\"  data-wpil-monitor-id=\"89945\">reports of this vulnerability<\/a> being exploited in highly sophisticated attacks against specific individuals. This makes it a significant concern for all users of the affected systems, as <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-42950-sap-landscape-transformation-vulnerability-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"77587\">potential exploitation could result in system<\/a> compromise and data leakage.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-43300<br \/>\nSeverity: High (CVSS: 8.8)<br \/>\nAttack Vector: Local Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: Required<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8939-buffer-overflow-vulnerability-in-tenda-ac20-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"78309\">System compromise and potential<\/a> data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-2543075116\" class=\"ameeb-content-2 ameeb-entity-placement\"><div style=\"border-left: 4px solid #555; padding-left: 20px; margin: 48px 0; font-family: Roboto, sans-serif; color: #ffffff; line-height: 1.6; max-width: 700px;\">\r\n  <h2 style=\"margin-top: 0; font-size: 20px; font-weight: 600; display: flex; align-items: center;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"display: inline-flex; align-items: center; margin-right: 8px;\">\r\n      <img decoding=\"async\" src=\"https:\/\/www.ameeba.com\/blog\/wp-content\/uploads\/2025\/10\/Best-App-icon-Ameeba.png\" alt=\"Ameeba Chat Icon\" style=\"width: 40px; height: 40px;\" \/>\r\n    <\/a>\r\n    A new way to communicate\r\n  <\/h2>\r\n\r\n  <p style=\"margin-bottom: 12px;\">\r\n    Ameeba Chat is built on encrypted identity, not personal profiles.\r\n  <\/p>\r\n\r\n  <p style=\"margin-bottom: 16px;\">\r\n    Message, call, share files, and coordinate with identities kept separate.\r\n  <\/p>\r\n\r\n  <ul style=\"list-style: none; padding-left: 0; margin-bottom: 20px;\">\r\n    <li>\u2022 Encrypted identity<\/li>\r\n    <li>\u2022 Ameeba Chat authenticates access<\/li>\r\n    <li>\u2022 Aliases and categories<\/li>\r\n    <li>\u2022 End-to-end encrypted chat, calls, and files<\/li>\r\n    <li>\u2022 Secure notes for sensitive information<\/li>\r\n  <\/ul>\r\n\r\n  <p style=\"font-style: italic; font-weight: 600; margin-bottom: 24px;\">\r\n    Private communication, rethought.\r\n  <\/p>\r\n\r\n  <div style=\"display: flex; flex-wrap: wrap; gap: 12px;\">\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\/download\" style=\"background-color: #ffffff; color: #000000; padding: 10px 20px; text-decoration: none; border-radius: 6px; font-weight: 500;\">Download Ameeba Chat<\/a>\r\n    <a href=\"https:\/\/www.ameeba.com\/chat\" style=\"border: 1px solid #ffffff; color: #ffffff; padding: 10px 20px; text-decoration: none; border-radius: 6px; font-weight: 500;\">Learn More<\/a>\r\n  <\/div>\r\n<\/div>\r\n<\/div>\n<p>Product | Affected Versions<\/p>\n<p>macOS Sonoma | 14.7.8<br \/>\nmacOS Ventura | 13.7.8<br \/>\niPadOS | 17.7.10<br \/>\nmacOS Sequoia | 15.6.1<br \/>\niOS | 18.6.2<br \/>\niPadOS | 18.6.2<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-43594-out-of-bounds-write-vulnerability-in-indesign-desktop\/\"  data-wpil-monitor-id=\"77173\">vulnerability stems from an out-of-bounds write<\/a> issue, a common type of software bug that occurs when data is written past the end of an allocated data buffer. In the case of CVE-2025-43300, the flaw is located within the image file processing functions.<br \/>\nWhen a user opens a specially crafted image file, it triggers the flaw, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-21125-serious-memory-corruption-vulnerability-leading-to-local-privilege-escalation\/\"  data-wpil-monitor-id=\"86038\">leading to memory corruption<\/a>. An attacker can leverage this to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3499-unauthenticated-rest-apis-expose-system-to-os-command-injection-attacks\/\"  data-wpil-monitor-id=\"77666\">inject malicious code into the system<\/a>, effectively gaining control over it. This can then be used to steal sensitive data or <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-50160-heap-based-buffer-overflow-in-windows-rras-posing-system-compromise-risk\/\"  data-wpil-monitor-id=\"78511\">compromise the system<\/a> further.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-4283736658\" class=\"ameeb-content ameeb-entity-placement\"><div class=\"poptin-embedded\" data-id=\"f6b387694f681\"><\/div>\r\n\r\n\r\n\r\n\r\n\r\n<\/div>\n<p>This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-55345-arbitrary-file-overwrite-and-remote-code-execution-vulnerability-in-codex-cli\/\"  data-wpil-monitor-id=\"76814\">vulnerability might be exploited using a specially crafted image file<\/a>, as shown below in pseudocode:<\/p>\n<pre><code class=\"\" data-line=\"\">Create malicious_image_file\nWrite out_of_bounds_data to malicious_image_file<\/code><\/pre>\n<p>The user then opens the malicious image file, which triggers the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-21165-out-of-bounds-write-vulnerability-in-substance3d-designer-leading-to-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"77434\">out-of-bounds write<\/a> and subsequent memory corruption:<\/p>\n<pre><code class=\"\" data-line=\"\">Open malicious_image_file\nRead data from malicious_image_file<\/code><\/pre>\n<p>While the above example is highly simplified, it serves to illustrate the concept of the exploit. The actual exploit would involve careful crafting of the image <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-53415-remote-code-execution-vulnerability-in-delta-electronics-dtm-soft-project-file-parsing\/\"  data-wpil-monitor-id=\"79096\">file to trigger the flaw and execute<\/a> the desired malicious payload.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview The world of cybersecurity is a constant battlefield, where new vulnerabilities are discovered and old ones are patched. One such recently discovered vulnerability, CVE-2025-43300, is a critical issue affecting multiple versions of macOS and iOS. This vulnerability, caused by an out-of-bounds write issue, can lead to memory corruption when processing a malicious image file. [&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,"footnotes":""},"categories":[1],"tags":[],"vendor":[77],"product":[],"attack_vector":[86],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-69156","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-apple","attack_vector-buffer-overflow"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/69156","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/comments?post=69156"}],"version-history":[{"count":12,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/69156\/revisions"}],"predecessor-version":[{"id":82817,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/69156\/revisions\/82817"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=69156"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=69156"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=69156"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=69156"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=69156"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=69156"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=69156"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=69156"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=69156"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}