{"id":21093,"date":"2025-04-10T22:37:06","date_gmt":"2025-04-10T22:37:06","guid":{"rendered":""},"modified":"2025-04-20T00:03:45","modified_gmt":"2025-04-20T00:03:45","slug":"cve-2024-0536-critical-remote-buffer-overflow-vulnerability-in-tenda-w9-1-0-0-74456","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2024-0536-critical-remote-buffer-overflow-vulnerability-in-tenda-w9-1-0-0-74456\/","title":{"rendered":"CVE-2024-0536: Critical Remote Buffer Overflow Vulnerability in Tenda W9 1.0.0.7(4456)"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>A critical vulnerability has been detected in the Tenda W9 1.0.0.7(4456), a popular router model used by individuals and organizations worldwide. This vulnerability, identified as CVE-2024-0536, specifically targets the setWrlAccessList function within the httpd component of the device. The critical nature of this vulnerability lies in the potential for remote exploitation, which could lead to a complete system compromise or <a class=\"wpil_keyword_link\" href=\"https:\/\/chat.ameeba.com\"   title=\"data\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"24166\">data<\/a> leakage.<\/p>\n<p>This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-48297-discourse-platform-high-severity-vulnerability-due-to-expanded-chat-mentions\/\"  data-wpil-monitor-id=\"31518\">vulnerability is of particular concern due<\/a> to the ability of potential attackers to exploit it remotely, without any form of user interaction. The impact of a successful <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-22611-critical-exploit-in-openerm-posing-severe-security-risks\/\"  data-wpil-monitor-id=\"26824\">exploit is severe<\/a>, with the potential for unauthorized system control or data leakage. Immediate attention and mitigation measures are strongly advised.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2024-0536<br \/>\nSeverity: Critical 8.8 (CVSS Score)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-0573-critical-vulnerability-in-totolink-lr1200gb-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"29045\">Potential system<\/a> compromise and data leakage<\/p><div id=\"ameeb-3423790512\" 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><strong>Affected Products<\/strong><\/p>\n<p>Product | Affected Versions<br \/>\n&#8212;&#8212;&#8211;|&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;-<br \/>\nTenda W9 | 1.0.0.7(4456)<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The vulnerability lies within the setWrlAccessList function of the httpd component in <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-0537-critical-remote-buffer-overflow-vulnerability-in-tenda-w9-1-0-0-7-4456\/\"  data-wpil-monitor-id=\"27078\">Tenda<\/a> W9. It arises due to improper handling of the argument ssidIndex, leading to a stack-based <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3011-uncovering-the-dangers-of-a-sophisticated-buffer-overflow-attack\/\"  data-wpil-monitor-id=\"24171\">buffer overflow<\/a>. A malicious actor can manipulate this argument to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-41288-critical-buffer-overflow-vulnerability-in-openssh\/\"  data-wpil-monitor-id=\"24179\">overflow the buffer<\/a>, potentially gaining the ability to execute arbitrary code and take control of the system.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-1665694509\" 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>Here&#8217;s a conceptual example of how the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-47992-critical-buffer-overflow-vulnerability-exploit-in-freeimage-library\/\"  data-wpil-monitor-id=\"25572\">vulnerability might be exploited<\/a>, using a malicious HTTP request:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/setWrlAccessList HTTP\/1.1\nHost: target.tenda.router\nContent-Type: application\/x-www-form-urlencoded\n\nssidIndex=AAAAAAAAAAAAAAA... [long string to overflow]<\/code><\/pre>\n<p>In this example, the `ssidIndex` parameter is filled with a long string designed to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-52150-unmasking-the-buffer-overflow-vulnerability\/\"  data-wpil-monitor-id=\"24194\">overflow the buffer<\/a>. This could potentially allow an attacker to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-21625-critical-remote-code-execution-vulnerability-in-network-protocol\/\"  data-wpil-monitor-id=\"24237\">execute arbitrary code<\/a> or cause a denial of service.<\/p>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p>Users of Tenda W9 running the affected version are highly advised to apply the vendor patch as soon as it becomes available. In the meantime, employing a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation measure. Also, restrict network access to the device as much as possible until the patch is applied, to minimize the <a class=\"wpil_keyword_link\" href=\"https:\/\/ameeba.com\"   title=\"risk\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"24165\">risk<\/a> of remote exploitation.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview A critical vulnerability has been detected in the Tenda W9 1.0.0.7(4456), a popular router model used by individuals and organizations worldwide. This vulnerability, identified as CVE-2024-0536, specifically targets the setWrlAccessList function within the httpd component of the device. The critical nature of this vulnerability lies in the potential for remote exploitation, which could lead [&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":[103],"product":[104],"attack_vector":[86,87],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-21093","post","type-post","status-publish","format-standard","hentry","category-uncategorized","vendor-apache","product-apache-httpd","attack_vector-buffer-overflow","attack_vector-dos"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/21093","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=21093"}],"version-history":[{"count":11,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/21093\/revisions"}],"predecessor-version":[{"id":27422,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/21093\/revisions\/27422"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=21093"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=21093"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=21093"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=21093"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=21093"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=21093"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=21093"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=21093"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=21093"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}