Overview
The cybersecurity world is witnessing a new vulnerability in the LCD KVM over IP Switch CL5708IM that has a Stack-based Buffer Overflow vulnerability. This vulnerability, designated as CVE-2025-3714, allows unauthenticated remote attackers to execute arbitrary code on the device. This vulnerability is particularly significant as it occurs in a widely used hardware device, potentially affecting numerous networks and systems worldwide. Given its severity and impact, understanding CVE-2025-3714 and taking necessary precautions is of utmost importance for organizations and security teams.
Vulnerability Summary
CVE ID: CVE-2025-3714
Severity: Critical (9.8/10 on CVSS Severity Score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Unauthenticated remote attackers can execute arbitrary code on the device, potentially leading to system compromise or data leakage.
Affected Products
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Product | Affected Versions
LCD KVM over IP Switch | CL5708IM
How the Exploit Works
The exploit takes advantage of a stack-based buffer overflow vulnerability in the LCD KVM over IP Switch CL5708IM. This vulnerability allows an unauthenticated remote attacker to send specially crafted data to the device over a network connection. The malicious data can cause the device to overflow its stack buffer, leading to memory corruption. This corruption can then be manipulated by the attacker to execute arbitrary code on the device, potentially leading to full system compromise.
Conceptual Example Code
Here is a conceptual example of how the vulnerability might be exploited:
POST /vulnerable_endpoint HTTP/1.1
Host: target.example.com
Content-Type: application/octet-stream
{ "buffer": "A"*1024 }In this conceptual example, the attacker sends a POST request to a vulnerable endpoint on the target device. The `buffer` field in the request body is filled with an excessively large string, triggering a buffer overflow.
Please note:
This example is purely conceptual. Actual exploit code may differ significantly and involve more complex manipulation of memory.
Mitigation Guidelines
The first and most effective mitigation step is to apply the vendor patch immediately. If the patch cannot be applied immediately, using a Web Application Firewall (WAF) or an Intrusion Detection System (IDS) can provide temporary mitigation. Both WAF and IDS can be configured to detect and block suspicious network traffic that targets the vulnerability. However, these are not permanent solutions and won’t provide full protection. Therefore, the vendor’s patch should be applied as soon as possible.