CVE-2025-47749: Unchecked Buffer Vulnerability in V-SFT

Overview

The CVE-2025-47749 vulnerability is a serious flaw found in V-SFT versions v6.2.5.0 and earlier. This vulnerability primarily affects system administrators, IT professionals, and users of the V-SFT software. It poses a significant threat to data integrity and system security as it could potentially allow an attacker to execute arbitrary code on a system, leading to a system crash, information disclosure, or even full system compromise.
This vulnerability is particularly dangerous due to the potential for remote exploitation and its high severity rating, emphasizing the critical need for immediate patches or alternative mitigation methods.

Vulnerability Summary

CVE ID: CVE-2025-47749
Severity: High (7.8 CVSS)
Attack Vector: Network
Privileges Required: Low
User Interaction: Required
Impact: System compromise, potential data leakage

Affected Products

Product | Affected Versions

V-SFT | v6.2.5.0 and earlier

How the Exploit Works

The vulnerability exists in VS6EditData.dll!CWinFontInf::WinFontMsgCheck function of V-SFT software. An attacker can exploit it by creating and sending specially crafted V7 or V8 files to a target system with the vulnerable software. Once the file is opened, it triggers a free of pointer not at the start of the buffer, causing the system to crash or potentially allowing the attacker to execute arbitrary code or disclose information.

Conceptual Example Code

The following is a conceptual representation of how an attacker might create a malicious V7 or V8 file to exploit the vulnerability:

# conceptually creating a malicious V8 file
malicious_file = V8File()
malicious_file.craft_exploit_payload("arbitrary code")
malicious_file.save("exploit.v8")
# conceptually sending the malicious file to the target system
target_system = NetworkSystem("target.example.com")
target_system.send_file("exploit.v8")

Upon the target system opening this maliciously crafted file with the vulnerable V-SFT software, the exploit would be triggered.
Remember, this is a conceptual example and not actual exploit code. Always follow ethical guidelines when dealing with vulnerabilities.

Mitigation Guidance

To mitigate the risks associated with CVE-2025-47749, users and administrators of V-SFT software should apply the patch provided by the vendor as soon as possible. In instances where immediate patching is not feasible, it is recommended to use a Web Application Firewall (WAF) or Intrusion Detection System (IDS) as a temporary mitigation measure. In addition, users should be cautious when opening V7 or V8 files from untrusted sources.