{"id":38497,"date":"2025-05-15T23:04:24","date_gmt":"2025-05-15T23:04:24","guid":{"rendered":""},"modified":"2025-06-09T11:19:31","modified_gmt":"2025-06-09T17:19:31","slug":"cve-2025-4449-critical-buffer-overflow-vulnerability-in-d-link-dir-619l","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-4449-critical-buffer-overflow-vulnerability-in-d-link-dir-619l\/","title":{"rendered":"<strong>CVE-2025-4449: Critical Buffer Overflow Vulnerability in D-Link DIR-619L<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>A critical vulnerability, classified as CVE-2025-4449, has been discovered in D-Link DIR-619L 2.04B04 which could potentially lead to serious system compromise or data leakage. This issue is situated within the function formEasySetupWizard3, and arises from the manipulation of the argument wan_connected which results in buffer overflow. This vulnerability is particularly concerning as the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-32819-remote-attacker-bypassing-path-traversal-checks-in-sma100\/\"  data-wpil-monitor-id=\"44110\">attack may be initiated remotely<\/a>, thus posing a significant threat to all users of the affected product. Despite the product no longer being supported by the maintainer, it is <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-5124-critical-vulnerability-in-sony-s-snc-series-cameras-due-to-use-of-default-credentials\/\"  data-wpil-monitor-id=\"56457\">critical to understand and mitigate this issue due<\/a> to the potential severity of the impact.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-4449<br \/>\nSeverity: Critical &#8211; CVSS 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=\"43420\">Potential system<\/a> compromise or data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-4247094082\" 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-2025-4452-critical-buffer-overflow-vulnerability-in-d-link-dir-619l-2-04b04\/\"  data-wpil-monitor-id=\"45249\">D-Link DIR-619L<\/a> | 2.04B04<\/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=\"43480\">vulnerability resides in the formEasySetupWizard3 function of the D-Link<\/a> DIR-619L 2.04B04. Specifically, the argument &#8220;wan_connected&#8221; is prone to manipulation, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-38620-integer-overflow-vulnerabilities-in-gtkwave-3-3-115-leading-to-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"43228\">leading to a buffer overflow<\/a> condition. <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-49122-critical-heap-based-buffer-overflow-vulnerability-in-solid-edge-se2023\/\"  data-wpil-monitor-id=\"43368\">Buffer overflow<\/a>, in this context, means that data that exceeds the buffer&#8217;s capacity is written into adjacent memory spaces. This can cause unexpected behaviors, such as crashes, incorrect data processing, or even <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-37576-arbitrary-code-execution-vulnerability-in-gtkwave\/\"  data-wpil-monitor-id=\"43254\">execution of malicious code<\/a>. The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-41645-unauthenticated-remote-attacker-hijacking-via-demo-account\/\"  data-wpil-monitor-id=\"49980\">attack can be initiated remotely<\/a> without any user interaction, making it a serious threat.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-4148761746\" 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>Below is a conceptual example of how the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47462-cross-site-request-forgery-vulnerability-in-ohidul-islam-challan-leading-to-privilege-escalation\/\"  data-wpil-monitor-id=\"43668\">vulnerability might be exploited using a malicious HTTP request:<\/a><\/p>\n<pre><code class=\"\" data-line=\"\">POST \/formEasySetupWizard3 HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/x-www-form-urlencoded\nwan_connected=OVERFLOW_PAYLOAD<\/code><\/pre>\n<p>In this example, `OVERFLOW_PAYLOAD` would be replaced with a crafted string that causes the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-49121-heap-based-buffer-overflow-vulnerability-in-solid-edge-se2023\/\"  data-wpil-monitor-id=\"43390\">buffer overflow<\/a>. This could potentially allow the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-37577-code-execution-vulnerability-in-gtkwave-3-3-115\/\"  data-wpil-monitor-id=\"43264\">execution of unauthorized code<\/a> or commands on the targeted system.<\/p>\n<p><strong>Mitigation<\/strong><\/p>\n<p>Users are advised to apply patches as <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47884-jenkins-openid-connect-provider-plugin-vulnerability-leading-to-unauthorized-access\/\"  data-wpil-monitor-id=\"50012\">provided by the vendor to mitigate this vulnerability<\/a>. In case the patch is unavailable, dependent on a product&#8217;s lifecycle status, implementing a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can offer temporary mitigation. These systems can potentially identify and <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-38657-out-of-bounds-write-vulnerability-in-gtkwave-lxt2-zlib-block-decompression\/\"  data-wpil-monitor-id=\"43188\">block attempts to exploit this vulnerability<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview A critical vulnerability, classified as CVE-2025-4449, has been discovered in D-Link DIR-619L 2.04B04 which could potentially lead to serious system compromise or data leakage. This issue is situated within the function formEasySetupWizard3, and arises from the manipulation of the argument wan_connected which results in buffer overflow. This vulnerability is particularly concerning as the attack [&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-38497","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\/38497","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=38497"}],"version-history":[{"count":14,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/38497\/revisions"}],"predecessor-version":[{"id":50430,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/38497\/revisions\/50430"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=38497"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=38497"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=38497"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=38497"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=38497"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=38497"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=38497"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=38497"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=38497"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}