{"id":43927,"date":"2025-05-24T12:27:57","date_gmt":"2025-05-24T12:27:57","guid":{"rendered":""},"modified":"2025-06-17T11:19:52","modified_gmt":"2025-06-17T17:19:52","slug":"cve-2025-4843-critical-stack-based-buffer-overflow-vulnerability-in-d-link-dcs-932l-2-18-01","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-4843-critical-stack-based-buffer-overflow-vulnerability-in-d-link-dcs-932l-2-18-01\/","title":{"rendered":"<strong>CVE-2025-4843: Critical Stack-Based Buffer Overflow Vulnerability in D-Link DCS-932L 2.18.01<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>A critical vulnerability, labeled CVE-2025-4843, has been identified in the firmware of D-Link DCS-932L 2.18.01, affecting the function SubUPnPCSInit of the file \/sbin\/udev. The vulnerability arises from a stack-based buffer overflow, triggered by improper handling of the argument CameraName. This specific flaw allows attackers to remotely compromise <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-27891-samsung-mobile-and-wearable-processors-vulnerability-leads-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"49298\">systems and potentially lead<\/a> to data leakage.<br \/>\nThis <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-41646-critical-authentication-bypass-vulnerability-in-affected-software-packages\/\"  data-wpil-monitor-id=\"59287\">vulnerability is of significant concern as it affects<\/a> a widely used product that is no longer supported by the maintainer. This means that many active <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-27523-xxe-vulnerability-in-hitachi-jp1-it-desktop-management-2-smart-device-manager-on-windows\/\"  data-wpil-monitor-id=\"50131\">devices could be vulnerable<\/a> and the existing user base may lack the resources to deal with the issue effectively.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2025-4843<br \/>\nSeverity: Critical (8.8 CVSS Score)<br \/>\nAttack Vector: Remote<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-22190-critical-gitpython-vulnerability-exposes-windows-systems-to-potential-compromise\/\"  data-wpil-monitor-id=\"51354\">Potential system<\/a> compromise and data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-672751885\" 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-2025-4841-critical-buffer-overflow-vulnerability-in-d-link-dcs-932l-2-18-01\/\"  data-wpil-monitor-id=\"50775\">D-Link DCS-932L<\/a> | 2.18.01<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The vulnerability stems from a stack-based <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-43564-improper-access-control-vulnerability-in-coldfusion-leading-to-arbitrary-file-system-read\/\"  data-wpil-monitor-id=\"49375\">buffer overflow<\/a> in the SubUPnPCSInit function of the file \/sbin\/udev. The function does not properly handle the CameraName argument, which can be manipulated by attackers to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-29964-heap-based-buffer-overflow-vulnerability-in-windows-media\/\"  data-wpil-monitor-id=\"49496\">overflow the buffer<\/a>. This can lead to <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-43560-improper-input-validation-vulnerability-in-coldfusion-allowing-arbitrary-code-execution\/\"  data-wpil-monitor-id=\"49356\">arbitrary code<\/a> execution, potentially granting the attacker full control of the system.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-215978030\" 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>The <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-23394-critical-unix-symbolic-link-following-vulnerability-in-opensuse-tumbleweed-cyrus-imapd\/\"  data-wpil-monitor-id=\"54396\">following pseudocode demonstrates how an attacker might exploit this vulnerability<\/a>:<\/p>\n<pre><code class=\"\" data-line=\"\">POST \/SubUPnPCSInit HTTP\/1.1\nHost: target_device_ip\nContent-Type: application\/json\n{ &quot;CameraName&quot;: &quot;A&quot; * 5000 } \/\/ Send a CameraName argument longer than the buffer can handle<\/code><\/pre>\n<p>In this conceptual example, a HTTP <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-47708-cross-site-request-forgery-vulnerability-in-drupal-enterprise-mfa-tfa\/\"  data-wpil-monitor-id=\"49775\">request is made to the vulnerable<\/a> endpoint on the target device with a CameraName argument that is longer than the buffer is designed to handle. This causes a <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-29962-heap-based-buffer-overflow-vulnerability-in-windows-media\/\"  data-wpil-monitor-id=\"49504\">buffer overflow<\/a>, potentially leading to arbitrary code execution.<\/p>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p><a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-48340-critical-csrf-vulnerability-in-danny-vink-user-profile-meta-manager-allows-privilege-escalation\/\"  data-wpil-monitor-id=\"52874\">Users affected by this vulnerability<\/a> are urged to apply the vendor-provided patch as soon as possible. If a patch cannot be applied immediately, users should consider implementing a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as a temporary mitigation measure. It is strongly recommended to replace or upgrade the affected devices to versions that are currently supported by the manufacturer.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview A critical vulnerability, labeled CVE-2025-4843, has been identified in the firmware of D-Link DCS-932L 2.18.01, affecting the function SubUPnPCSInit of the file \/sbin\/udev. The vulnerability arises from a stack-based buffer overflow, triggered by improper handling of the argument CameraName. This specific flaw allows attackers to remotely compromise systems and potentially lead to data leakage. [&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":[86,80],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-43927","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-buffer-overflow","attack_vector-rce"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/43927","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=43927"}],"version-history":[{"count":12,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/43927\/revisions"}],"predecessor-version":[{"id":52986,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/43927\/revisions\/52986"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=43927"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=43927"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=43927"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=43927"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=43927"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=43927"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=43927"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=43927"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=43927"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}