Executive Summary

CVE-2018-25230 is a buffer overflow vulnerability in Free IP Switcher version 3.1 and earlier. It occurs when a local attacker supplies an excessively long string in the Computer Name input field. This causes the application to crash, resulting in a denial of service condition.

The vulnerability is triggered by pasting a malicious payload into the Computer Name field and clicking Activate, which overflows the buffer allocated for the computer name and crashes the application.

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Impact Analysis

This vulnerability can impact you by causing the Free IP Switcher application to crash, resulting in a denial of service (DoS).

Since the vulnerability requires local access and user interaction but no special privileges or network access, an attacker with local access can disrupt the normal operation of the application by triggering this crash.

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Detection Guidance

This vulnerability can be detected by attempting to reproduce the crash condition locally on the system running Free IP Switcher 3.1. Specifically, a test involves pasting an excessively long string into the Computer Name field and activating it to see if the application crashes.

A proof-of-concept method includes the following steps:

• Copy a string of 240 'A' characters (e.g., "AAAAAAAA..." repeated 240 times) to the clipboard.
• Open Free IP Switcher and select the Network Adapter option.
• Enable the Computer Name option in the Additional settings.
• Paste the long string into the Computer Name field.
• Click the Activate button and observe if the application crashes.

This test requires local access and user interaction; there are no specific network commands or automated network detection methods documented.

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Mitigation Strategies

Immediate mitigation steps include avoiding the use of the Computer Name field in Free IP Switcher 3.1 or earlier versions, especially refraining from entering excessively long strings or untrusted input.

Since the vulnerability requires local access and user interaction, restricting access to the application to trusted users only can reduce risk.

If possible, update to a newer version of the software that addresses this buffer overflow vulnerability or apply any available patches from the vendor.

Monitor for application crashes related to the Computer Name input and educate users about the risk of pasting untrusted data into this field.

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Compliance Impact

The provided information about CVE-2018-25230 does not include any details regarding its impact on compliance with common standards and regulations such as GDPR or HIPAA.

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