Compliance Impact

The provided information does not include any details on how the CVE-2018-25252 vulnerability affects compliance with common standards and regulations such as GDPR or HIPAA.

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Executive Summary

CVE-2018-25252 is a denial of service vulnerability in FTP Voyager version 16.2.0 and earlier. It occurs because the application does not properly handle oversized input in the site profile IP field. Specifically, a local attacker can create a malicious site profile containing about 500 bytes of repeated characters and paste it into the IP field. This triggers a buffer overflow (an out-of-bounds write) that causes the FTP Voyager process to crash.

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Impact Analysis

This vulnerability can cause a denial of service (DoS) condition by crashing the FTP Voyager application. An attacker with local access can exploit this by injecting a specially crafted input into the IP field of a site profile, causing the application to stop functioning. This disrupts normal file transfer operations and availability of the FTP Voyager service.

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Detection Guidance

This vulnerability can be detected by attempting to reproduce the denial of service condition on FTP Voyager 16.2.0 by injecting an oversized buffer into the site profile IP field.

A proof-of-concept involves creating a payload of 500 repeated characters (e.g., 500 "A" characters) and pasting it into the IP field of a new site profile in FTP Voyager. If the application crashes, the vulnerability is present.

A sample Python script can be used to generate the payload file (boom.txt) containing 500 "A" characters:

• python -c "print('A'*500)" > boom.txt

Then, copy the contents of boom.txt and paste it into the IP field of a new site profile in FTP Voyager to test for the crash.

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Mitigation Strategies

To mitigate this vulnerability, avoid using FTP Voyager version 16.2.0 or earlier where this buffer overflow exists.

Since the vulnerability requires local access to inject the malicious input, restrict local access to FTP Voyager and ensure only trusted users can create or modify site profiles.

Consider upgrading to a newer version or alternative software that does not contain this vulnerability, such as using the Serv-U Web Client which replaces FTP Voyager JV and improves security.

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