Author: Ameeba

Overview

Recent cybersecurity investigations have flagged a significant vulnerability, CVE-2025-47760, within the V-SFT software versions up to v6.2.5.0. This vulnerability, a stack-based buffer overflow issue, is located in the VS6MemInIF!set_temp_type_default function and can be triggered by opening specially crafted V7 or V8 files. This vulnerability is of immediate concern as it allows for potential system compromise or data leakage. It is pertinent to individuals or organizations using the vulnerable versions of V-SFT software as it could lead to unauthorized access to sensitive data and potentially disrupt essential operations.

Vulnerability Summary

CVE ID: CVE-2025-47760
Severity: High (7.8 CVSS Severity Score)
Attack Vector: Specially crafted V7 or V8 files
Privileges Required: Low
User Interaction: Required
Impact: Potential system compromise or data leakage

Affected Products

Product | Affected Versions

V-SFT | v6.2.5.0 and earlier

How the Exploit Works

The vulnerability arises from an issue within the VS6MemInIF!set_temp_type_default function in the V-SFT software. By crafting and then opening specially designed V7 or V8 files, the stack-based buffer overflow vulnerability can be exploited. A successful exploit could cause the software to crash, which may result in unauthorized information disclosure and arbitrary code execution. This potential arbitrary code execution could enable attackers to gain control over the affected system, leading to a system compromise or data leakage.

Conceptual Example Code

The following pseudocode gives a basic illustration of how the vulnerability might be exploited:

# Pseudocode for exploiting CVE-2025-47760
# Create a malicious V8 file
malicious_file = create_malicious_file()
# Open the malicious V8 file in V-SFT
open_file_in_vsft(malicious_file)
# The opening of the file triggers the buffer overflow
# and executes the malicious code embedded within the file

It’s important to note that the exploit requires user interaction – specifically the opening of the malicious file. This aspect could be exploited in a phishing attack, where unsuspecting users are tricked into opening the harmful file.

Mitigation Guidance

The primary mitigation method for CVE-2025-47760 is to apply the vendor patch. In situations where the patch cannot be immediately implemented, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as temporary mitigation. With this, the potential impact of the vulnerability can be reduced until the vendor’s patch is applied. Users are strongly urged to apply the patch as soon as possible to prevent potential system compromise or data leakage.

Overview

CVE-2025-47759 is a severe cybersecurity vulnerability that affects V-SFT v6.2.5.0 software and earlier versions. This vulnerability has to do with a stack-based buffer overflow located in the VS6ComFile!CV7BaseMap::WriteV7DataToRom function. The issue arises when opening specially crafted V7 or V8 files, which can lead to a crash, information disclosure, and even arbitrary code execution.
The vulnerability is of particular concern due to its potential to compromise systems and leak sensitive data. As these consequences can have a significant impact on both businesses and individuals who rely on the V-SFT software, addressing CVE-2025-47759 is a critical task for cybersecurity professionals.

Vulnerability Summary

CVE ID: CVE-2025-47759
Severity: High (7.8 CVSS Score)
Attack Vector: Local File Input
Privileges Required: Low
User Interaction: Required
Impact: System crash, sensitive information disclosure, and arbitrary code execution

Affected Products

Product | Affected Versions

V-SFT | v6.2.5.0 and earlier

How the Exploit Works

The exploit for CVE-2025-47759 takes advantage of a stack-based buffer overflow vulnerability in the VS6ComFile!CV7BaseMap::WriteV7DataToRom function. This is triggered when the user opens a specially crafted V7 or V8 file. The buffer overflow can lead to memory corruption, which can result in a system crash or, worse, the execution of arbitrary code. This implies that an attacker could take control of the system or access sensitive information that should have been protected.

Conceptual Example Code

Here’s a conceptual example of how the vulnerability might be exploited:

# Pseudocode for exploit
def exploit(vulnerable_file):
crafted_data = get_crafted_data()  # Get the specially crafted data that overflows the buffer
file = open(vulnerable_file, 'w')
file.write(crafted_data)  # Write the crafted data to the file
file.close()
open_v7_v8_file(vulnerable_file)  # Open the file using the vulnerable function
exploit('vulnerable.v7')

Please note that this is a mere conceptual representation of how the exploit might work. Actual exploitation will involve much more complex steps and knowledge of the underlying software’s architecture.

Overview

The vulnerability we’re discussing today, designated as CVE-2025-47758, is a stack-based buffer overflow vulnerability that affects V-SFT versions 6.2.5.0 and earlier. This security vulnerability is especially concerning as it can lead to system crashes, information disclosure, and arbitrary code execution when opening specially crafted V7 or V8 files. The issue lies in the VS6File!CTxSubFile::get_ProgramFile_name function, and if exploited successfully, it could potentially lead to a full system compromise or data leakage.

Vulnerability Summary

CVE ID: CVE-2025-47758
Severity: High (7.8 CVSS Score)
Attack Vector: Local
Privileges Required: User
User Interaction: Required
Impact: System crashes, information disclosure, arbitrary code execution, potential system compromise or data leakage

Affected Products

Product | Affected Versions

V-SFT | 6.2.5.0 and earlier

How the Exploit Works

The exploit takes advantage of a stack-based buffer overflow vulnerability in the VS6File!CTxSubFile::get_ProgramFile_name function of V-SFT. An attacker would create a specially crafted V7 or V8 file and induce a user to open it. This would result in an overflow of the stack buffer, leading to a system crash, information disclosure, or arbitrary code execution.

Conceptual Example Code

Here’s a conceptual example of how an attacker might craft a malicious V7 or V8 file to exploit this vulnerability:

# This is a conceptual example, and should not be used for malicious intent
def create_malicious_file(filename):
overflow_payload = 'A' * 1024  # Stack buffer size + 1
with open(filename, 'w') as file:
file.write(overflow_payload)
create_malicious_file('malicious.v7')

In the above example, the malicious file (‘malicious.v7’) contains a payload that exceeds the stack buffer size, leading to a buffer overflow when the file is opened using the vulnerable function in V-SFT.

Mitigation Guidance

Users and administrators are advised to apply the vendor-provided patch to mitigate this vulnerability. As a temporary mitigation, a Web Application Firewall (WAF) or Intrusion Detection System (IDS) could be used to detect and block attempts to exploit this vulnerability. However, these measures should only be considered as temporary, and the application of the vendor patch should not be delayed.