Overview
The following report examines a severe vulnerability identified in Delta Electronics DIAScreen. This vulnerability, designated CVE-2025-59300, arises due to improper validation of user-supplied files, and if exploited, could enable an attacker to execute code within the current process context. This flaw poses a significant risk to data integrity and system security, rendering them vulnerable to potential compromise or data leakage.
Vulnerability Summary
CVE ID: CVE-2025-59300
Severity: High (CVSS: 7.8)
Attack Vector: Local
Privileges Required: None
User Interaction: Required
Impact: Potential system compromise or data leakage
Affected Products
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Product | Affected Versions
Delta Electronics DIAScreen | All versions up to latest
How the Exploit Works
The vulnerability stems from the lack of proper validation of user-supplied files in Delta Electronics DIAScreen. An attacker can craft a malicious file that, when opened by a user, can exploit this vulnerability to execute arbitrary code within the current process context. This could lead to unauthorized access, data leakage, or even system compromise.
Conceptual Example Code
Below is a conceptual example of how the vulnerability might be exploited. In this case, the malicious payload is embedded within a file that the user is tricked into opening.
POST /upload_file HTTP/1.1
Host: vulnerable.example.com
Content-Type: multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW
------WebKitFormBoundary7MA4YWxkTrZu0gW
Content-Disposition: form-data; name="file"; filename="malicious_file.txt"
Content-Type: text/plain
{ "malicious_payload": "..." }
------WebKitFormBoundary7MA4YWxkTrZu0gW--Mitigation Guidance
To mitigate this vulnerability, users are advised to apply the latest patch provided by the vendor. As a temporary mitigation measure, users may also consider deploying a Web Application Firewall (WAF) or Intrusion Detection System (IDS) to monitor and block potential exploit attempts.
