{"id":23186,"date":"2025-04-14T13:08:10","date_gmt":"2025-04-14T13:08:10","guid":{"rendered":""},"modified":"2025-06-17T11:19:54","modified_gmt":"2025-06-17T17:19:54","slug":"cve-2023-5376-improper-authentication-vulnerability-in-korenix-jetnet-tftp","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2023-5376-improper-authentication-vulnerability-in-korenix-jetnet-tftp\/","title":{"rendered":"<strong>CVE-2023-5376: Improper Authentication Vulnerability in Korenix JetNet TFTP<\/strong>"},"content":{"rendered":"<p><strong>Overview<\/strong><\/p>\n<p>In the ever-evolving world of cybersecurity, one vulnerability that has recently come to light is CVE-2023-5376. This vulnerability affects the TFTP (Trivial File Transfer Protocol) service on Korenix JetNet devices, specifically those with firmware versions older than 2024\/01. The improper authentication vulnerability can potentially allow malicious actors to abuse the TFTP service, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-0572-critical-vulnerability-in-totolink-lr1200gb-leading-to-system-compromise\/\"  data-wpil-monitor-id=\"29007\">leading to system<\/a> compromise or data leakage. This <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-0577-critical-vulnerability-in-totolink-lr1200gb-router-allows-potential-remote-exploitation\/\"  data-wpil-monitor-id=\"29426\">vulnerability is of significant concern due to the potential<\/a> damage it can inflict on unpatched JetNet devices.<\/p>\n<p><strong>Vulnerability Summary<\/strong><\/p>\n<p>CVE ID: CVE-2023-5376<br \/>\nSeverity: High (8.6 CVSS v3.0)<br \/>\nAttack Vector: Network<br \/>\nPrivileges Required: None<br \/>\nUser Interaction: None<br \/>\nImpact: <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-43514-memory-corruption-vulnerability-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"31583\">Potential system<\/a> compromise and data leakage<\/p>\n<p><strong>Affected Products<\/strong><\/p><div id=\"ameeb-1764821654\" 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>Korenix JetNet TFTP | Firmware versions older than 2024\/01<\/p>\n<p><strong>How the Exploit Works<\/strong><\/p>\n<p>The <a href=\"https:\/\/www.ameeba.com\/blog\/fortinet-s-fortigate-vulnerability-ssl-vpn-symlink-exploit-puts-user-access-at-risk-post-patching\/\"  data-wpil-monitor-id=\"30078\">exploit takes advantage of the Improper Authentication vulnerability<\/a> in the TFTP service. An <a href=\"https:\/\/www.ameeba.com\/blog\/local-hospital-network-grapples-with-major-tech-outage-a-cybersecurity-attack-case-study\/\"  data-wpil-monitor-id=\"51076\">attacker can send specially crafted network<\/a> requests to the affected TFTP service. Due to the lack of proper authentication mechanisms, the vulnerable TFTP service processes these malicious requests, giving the attacker unauthorized <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-2945-unveiling-the-system-access-vulnerability-in-network-security-protocols\/\"  data-wpil-monitor-id=\"28021\">access to the system<\/a>.<\/p>\n<p><strong>Conceptual Example Code<\/strong><\/p><div id=\"ameeb-1789242324\" 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-2023-50123-exploitable-vulnerability-in-hozard-alarm-system-sms-authentication\/\"  data-wpil-monitor-id=\"51078\">vulnerability might be exploited<\/a>. This is a hypothetical scenario that represents a possible network request from an attacker.<\/p>\n<pre><code class=\"\" data-line=\"\">GET \/tftp\/vulnerable_endpoint HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/octet-stream\n{ &quot;malicious_payload&quot;: &quot;...&quot; }<\/code><\/pre>\n<p>In the above example, the attacker sends a GET request to the <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-56406-buffer-overflow-vulnerability-in-perl-leading-to-potential-denial-of-service-and-code-execution\/\"  data-wpil-monitor-id=\"33138\">vulnerable endpoint of the TFTP service<\/a>. The malicious payload in the request is processed by the service due to the Improper Authentication vulnerability, <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2024-0576-critical-vulnerability-in-totolink-lr1200gb-leading-to-potential-system-compromise\/\"  data-wpil-monitor-id=\"29385\">potentially leading to unauthorized system<\/a> access or data leakage.<\/p>\n<p><strong>Mitigation Guidance<\/strong><\/p>\n<p>To <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2023-51063-understanding-and-mitigating-a-dom-based-xss-vulnerability-in-qstar-archive-solutions\/\"  data-wpil-monitor-id=\"28020\">mitigate this vulnerability<\/a>, it is recommended to apply the patch provided by the vendor. This patch should upgrade the firmware to version 2024\/01 or later, which is not <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-41646-critical-authentication-bypass-vulnerability-in-affected-software-packages\/\"  data-wpil-monitor-id=\"59292\">affected by this vulnerability<\/a>. If the patch cannot be applied immediately, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) could serve as a temporary mitigation method. These systems can monitor <a href=\"https:\/\/www.ameeba.com\/blog\/cve-2025-31214-a-critical-network-traffic-interception-vulnerability-in-ios-and-ipados\/\"  data-wpil-monitor-id=\"51077\">network traffic<\/a> for malicious activity and block such requests, thereby reducing the risk of exploitation.<br \/>\nIn addition to these steps, it&#8217;s important to maintain good <a href=\"https:\/\/www.ameeba.com\/blog\/betting-on-cybersecurity-a-comparative-analysis-of-cisco-systems-and-okta-stocks\/\"  data-wpil-monitor-id=\"28939\">cybersecurity hygiene practices like monitoring system<\/a> logs, educating users about the risks of phishing attacks, and keeping all systems updated with the latest patches and updates.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview In the ever-evolving world of cybersecurity, one vulnerability that has recently come to light is CVE-2023-5376. This vulnerability affects the TFTP (Trivial File Transfer Protocol) service on Korenix JetNet devices, specifically those with firmware versions older than 2024\/01. The improper authentication vulnerability can potentially allow malicious actors to abuse the TFTP service, leading to [&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":[],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-23186","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/23186","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=23186"}],"version-history":[{"count":10,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/23186\/revisions"}],"predecessor-version":[{"id":52990,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/posts\/23186\/revisions\/52990"}],"wp:attachment":[{"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/media?parent=23186"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/categories?post=23186"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/tags?post=23186"},{"taxonomy":"vendor","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/vendor?post=23186"},{"taxonomy":"product","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/product?post=23186"},{"taxonomy":"attack_vector","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/attack_vector?post=23186"},{"taxonomy":"asset_type","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/asset_type?post=23186"},{"taxonomy":"severity","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/severity?post=23186"},{"taxonomy":"exploit_status","embeddable":true,"href":"https:\/\/www.ameeba.com\/blog\/wp-json\/wp\/v2\/exploit_status?post=23186"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}