{"id":37636,"date":"2025-05-13T01:26:38","date_gmt":"2025-05-13T01:26:38","guid":{"rendered":""},"modified":"2025-09-14T19:05:38","modified_gmt":"2025-09-15T01:05:38","slug":"cve-2025-4343-critical-buffer-overflow-vulnerability-in-d-link-dir-600l","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-4343-critical-buffer-overflow-vulnerability-in-d-link-dir-600l\/","title":{"rendered":"<strong>CVE-2025-4343: Critical Buffer Overflow Vulnerability in D-Link DIR-600L<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>In a critical revelation, a severe vulnerability has been discovered in the D-Link DIR-600L up to version 2.07B01. This vulnerability is potentially alarming as it can lead to a buffer overflow through the manipulation of the host argument in the function formEasySetupWizard. The vulnerability is of particular significance because the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32819-remote-attacker-bypassing-path-traversal-checks-in-sma100\/\"  data-wpil-monitor-id=\"44112\">attack can be initiated remotely<\/a>, putting numerous systems at risk. Given the severity of the situation, understanding the intricacies of this <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-8913-critical-local-file-inclusion-vulnerability-in-wellchoose-s-organization-portal-system\/\"  data-wpil-monitor-id=\"82418\">vulnerability is crucial for organizations<\/a> that may still be using these no longer supported products.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-4343<br \/>\nSeverity: Critical, CVSS Severity Score 8.8<br \/>\nAttack Vector: Remote<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-49126-critical-vulnerability-in-solid-edge-se2023-allows-for-potential-system-compromise\/\"  data-wpil-monitor-id=\"43436\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-171577826\" 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><a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4349-critical-command-injection-vulnerability-in-d-link-dir-600l-routers\/\"  data-wpil-monitor-id=\"43869\">D-Link DIR-600L<\/a> | Up to 2.07B01<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4342-critical-buffer-overflow-vulnerability-in-d-link-dir-600l\/\"  data-wpil-monitor-id=\"43478\">vulnerability is present within the function formEasySetupWizard of D-Link<\/a> DIR-600L. Specifically, the issue arises from the improper handling of the host argument. When manipulated, this can lead to a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4147-critical-remote-buffer-overflow-vulnerability-in-netgear-ex6200-1-0-3-94\/\"  data-wpil-monitor-id=\"42320\">buffer overflow<\/a>. A <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4139-critical-buffer-overflow-vulnerability-in-netgear-ex6120-1-0-0-68\/\"  data-wpil-monitor-id=\"42403\">buffer overflow<\/a> is a situation where a program or process attempts to write more data to a fixed length block of memory, or buffer, than it is allocated to hold. This overflow can overwrite adjacent memory, leading to erratic program behavior, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-49129-stack-overflow-vulnerability-in-solid-edge-se2023-allows-potential-system-compromise\/\"  data-wpil-monitor-id=\"43513\">potentially resulting in system<\/a> crashes, incorrect outputs, or a breach of system security.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-1090348400\" 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 is a conceptual example of how an HTTP request might be manipulated to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47154-exploitation-of-use-after-free-vulnerability-in-libjs-in-ladybird\/\"  data-wpil-monitor-id=\"42331\">exploit this vulnerability<\/a>:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/formEasySetupWizard HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/x-www-form-urlencoded\nhost=AAAAAAAAAAAAAAAAAAAAAAAAAAAAA... (long string of A&#039;s to cause buffer overflow)<\/code><\/pre>\n<p>In this example, the string of A&#8217;s represents a large amount of data that <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-4142-critical-buffer-overflow-vulnerability-in-netgear-ex6200-1-0-3-94\/\"  data-wpil-monitor-id=\"42424\">overflows the buffer<\/a> when the host argument is processed. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-36864-integer-overflow-vulnerability-in-gtkwave-3-3-115-with-potential-for-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"42478\">overflowing data can potentially<\/a> overwrite crucial information, leading to the aforementioned system compromise or data leakage.<\/p>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p>Given that the D-Link DIR-600L products affected by CVE-2025-4343 are no longer supported by the manufacturer, it&#8217;s crucial for users to apply the appropriate vendor patch as soon as possible. If a patch is not immediately available or applicable, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as temporary mitigation strategies. These measures can help detect and prevent attempted exploitation of the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-3844-critical-authentication-bypass-vulnerability-in-peprodev-ultimate-profile-solutions-plugin-for-wordpress\/\"  data-wpil-monitor-id=\"45125\">vulnerability until a more permanent solution<\/a> can be implemented.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview In a critical revelation, a severe vulnerability has been discovered in the D-Link DIR-600L up to version 2.07B01. This vulnerability is potentially alarming as it can lead to a buffer overflow through the manipulation of the host argument in the function formEasySetupWizard. The vulnerability is of particular significance because the attack can be initiated [&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":[],"product":[],"attack_vector":[86],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-37636","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-buffer-overflow"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/37636","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=37636"}],"version-history":[{"count":12,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/37636\/revisions"}],"predecessor-version":[{"id":74935,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/37636\/revisions\/74935"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=37636"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=37636"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=37636"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=37636"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=37636"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=37636"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=37636"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=37636"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=37636"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}