{"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":"CVE-2023-5376: Improper Authentication Vulnerability in Korenix JetNet TFTP<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

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 system<\/a> compromise or data leakage. This vulnerability is of significant concern due to the potential<\/a> damage it can inflict on unpatched JetNet devices.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2023-5376
\nSeverity: High (8.6 CVSS v3.0)
\nAttack Vector: Network
\nPrivileges Required: None
\nUser Interaction: None
\nImpact: Potential system<\/a> compromise and data leakage<\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

Korenix JetNet TFTP | Firmware versions older than 2024\/01<\/p>\n

How the Exploit Works<\/strong><\/p>\n

The exploit takes advantage of the Improper Authentication vulnerability<\/a> in the TFTP service. An 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 access to the system<\/a>.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

Below is a conceptual example of how the vulnerability might be exploited<\/a>. This is a hypothetical scenario that represents a possible network request from an attacker.<\/p>\n

GET \/tftp\/vulnerable_endpoint HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/octet-stream\n{ \"malicious_payload\": \"...\" }<\/code><\/pre>\n
In the above example, the attacker sends a GET request to the vulnerable endpoint of the TFTP service<\/a>. The malicious payload in the request is processed by the service due to the Improper Authentication vulnerability, potentially leading to unauthorized system<\/a> access or data leakage.<\/p>\n
Mitigation Guidance<\/strong><\/p>\n
To 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 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 network traffic<\/a> for malicious activity and block such requests, thereby reducing the risk of exploitation.
\nIn addition to these steps, it’s important to maintain good 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":"
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 […]<\/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,"_monsterinsights_skip_tracking":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":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t