Overview
The CVE-2025-3712 vulnerability is a critical flaw found in the LCD KVM over IP Switch CL5708IM that could lead to a potential system compromise or data leakage. It is a serious cybersecurity issue as it allows unauthenticated remote attackers to perform a denial-of-service (DoS) attack by exploiting a Heap-based Buffer Overflow vulnerability.
Vulnerability Summary
CVE ID: CVE-2025-3712
Severity: High (CVSS: 7.5)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise and data leakage through denial-of-service attack
Affected Products
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Product | Affected Versions
LCD KVM over IP Switch CL5708IM | All versions before the patch
How the Exploit Works
The vulnerability lies in the improper handling of user-supplied inputs. The flaw in the Heap-based memory allocation of the LCD KVM over IP Switch CL5708IM allows an unauthenticated remote attacker to overflow the buffer by sending specially crafted data. This overflow could corrupt data, crash the system, or allow the attacker to execute arbitrary code, leading to a denial of service.
Conceptual Example Code
A conceptual example of how this vulnerability might be exploited is shown below:
POST /vulnerable/endpoint HTTP/1.1
Host: target.example.com
Content-Type: application/json
{
"data": "A"*8000
}In this example, the attacker sends a JSON object with the “data” key containing a string of 8000 ‘A’ characters. This data is much larger than the buffer can handle, causing it to overflow.
Mitigation
Users are advised to apply the vendor patch as soon as it’s available. In the meantime, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can be used as a temporary mitigation to monitor network traffic and detect any attempts to exploit this vulnerability.
