Executive Summary

CVE-2018-25215 is a local buffer overflow vulnerability found in Excel Password Recovery Professional version 8.2.0.0 and earlier. It occurs when an attacker inputs an excessively long string—specifically a crafted payload of 5000 bytes—into the 'E-Mail and Registrations Code' field. This causes the application to crash when the Register button is clicked.

The vulnerability is classified as an out-of-bounds write (CWE-787) and results in a denial of service (DoS) condition by crashing the software.

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Impact Analysis

This vulnerability can impact you by causing the Excel Password Recovery Professional software to crash unexpectedly when a maliciously crafted input is provided in the registration code field.

The impact is a denial of service (DoS), meaning legitimate users will be unable to use the software properly until it is restarted or fixed.

Since the attack requires local access and user interaction, it is not remotely exploitable but can disrupt normal operations on the affected system.

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Detection Guidance

This vulnerability can be detected by attempting to reproduce the buffer overflow condition locally on the system running Excel Password Recovery Professional 8.2.0.0.

A known method involves creating a payload of 5000 bytes (e.g., 5000 'A' characters) and pasting it into the 'E-Mail and Registrations Code' field of the application, then clicking the Register button to see if the application crashes.

Specifically, a Python script can be used to generate this payload and save it to a file, which is then copied to the clipboard for pasting.

• Run a Python script (e.g., Excel_Password_Recovery.py) to generate a file 'Evil.txt' containing 5000 'A' characters.
• Copy the contents of 'Evil.txt' to the clipboard.
• Open Excel Password Recovery Professional and paste the payload into the 'E-Mail and Registrations Code' field.
• Click the Register button and observe if the application crashes, indicating the presence of the vulnerability.

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Mitigation Strategies

To mitigate this vulnerability, immediate steps include avoiding the use of the 'E-Mail and Registrations Code' field for registration with untrusted input.

Do not paste or input excessively long strings (such as 5000 bytes) into the registration code field.

Limit user interaction with the registration feature to trusted personnel only, as the attack requires local user interaction.

Monitor for application crashes related to the registration process as an indicator of attempted exploitation.

Check for updates or patches from the vendor that address this buffer overflow vulnerability.

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Compliance Impact

The vulnerability in Excel Password Recovery Professional 8.2.0.0 is a local buffer overflow that causes a denial of service by crashing the application when an excessively long string is supplied to the registration field.

There is no information provided in the available resources or CVE description about any impact on data confidentiality, integrity, or exposure that would directly affect compliance with common standards and regulations such as GDPR or HIPAA.

Since the vulnerability results in a denial of service without evidence of data breach or unauthorized data access, its effect on compliance with regulations focused on data protection and privacy is likely minimal or indirect.

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