CVE-2019-25649: River Past Audio Converter DoS Vulnerability

CVE-2019-25649 Overview

CVE-2019-25649 is a local buffer overflow vulnerability affecting River Past Audio Converter version 7.7.16. The vulnerability exists in the activation code field handling, where improper input validation allows local attackers to crash the application by supplying an oversized input string. This is classified as CWE-787 (Out-of-bounds Write), a memory corruption issue that occurs when the application writes data past the boundaries of allocated memory.

Critical Impact

Local attackers can trigger a denial of service condition by pasting a large payload of repeated characters into the 'E-Mail and Activation Code' field and clicking 'Activate', causing the application to crash.

Affected Products

• River Past Audio Converter 7.7.16

Discovery Timeline

• 2026-03-26 - CVE-2019-25649 published to NVD
• 2026-03-26 - Last updated in NVD database

Technical Details for CVE-2019-25649

Vulnerability Analysis

This buffer overflow vulnerability stems from insufficient bounds checking in the activation code input handling mechanism of River Past Audio Converter. When a user enters data into the 'E-Mail and Activation Code' field, the application fails to properly validate the length of the input before copying it into a fixed-size buffer. This allows an attacker with local access to supply an excessively long string that overflows the allocated memory region.

The vulnerability requires local access and user interaction to exploit, as the attacker must either have direct access to the application or convince a legitimate user to paste malicious content into the activation field. While the current exploitation scenario results in a denial of service (application crash), buffer overflows of this nature can potentially be leveraged for more severe attacks such as arbitrary code execution if the memory layout can be carefully manipulated.

Root Cause

The root cause is an out-of-bounds write (CWE-787) in the activation code processing logic. The application allocates a fixed-size buffer for the activation code input but does not enforce proper length restrictions before writing user-supplied data into this buffer. When oversized input is provided, the write operation exceeds the buffer boundaries, corrupting adjacent memory and causing application instability.

Attack Vector

The attack requires local access to a system running River Past Audio Converter 7.7.16. An attacker exploits this vulnerability by:

1. Opening the River Past Audio Converter application
2. Navigating to the activation dialog
3. Pasting a large payload of repeated characters (typically thousands of characters) into the 'E-Mail and Activation Code' field
4. Clicking the 'Activate' button to trigger the buffer overflow

The overflow occurs when the application attempts to process the oversized input, resulting in memory corruption and subsequent application crash. Technical details and proof-of-concept information can be found in the Exploit-DB advisory #46322.

Detection Methods for CVE-2019-25649

Indicators of Compromise

• Unexpected crashes of River Past Audio Converter application
• Application crash logs showing memory access violations or buffer overflow exceptions
• Large strings or payloads found in application input fields or logs
• Repeated attempts to activate the software with malformed activation codes

Detection Strategies

• Monitor for application crash events related to River Past Audio Converter processes
• Implement endpoint detection rules to identify memory corruption attempts in legacy software
• Review system event logs for access violation errors associated with RiverPast executables
• Deploy behavioral analysis to detect abnormal application terminations

Monitoring Recommendations

• Enable crash dump collection for River Past Audio Converter to capture forensic evidence
• Monitor endpoint telemetry for signs of exploitation attempts against legacy applications
• Consider implementing application whitelisting to control which users can execute vulnerable software
• Track software inventory to identify systems running vulnerable versions of River Past Audio Converter

How to Mitigate CVE-2019-25649

Immediate Actions Required

• Assess whether River Past Audio Converter 7.7.16 is deployed within your environment
• Consider removing or replacing River Past Audio Converter with a supported alternative
• Restrict access to the application to trusted users only
• Implement application-level controls to prevent unauthorized activation attempts
• Monitor for exploitation attempts while planning remediation

Patch Information

No official vendor patch information is available for this vulnerability. River Past Audio Converter appears to be legacy software, and users should consider migrating to actively maintained audio conversion solutions. For additional technical details, refer to the VulnCheck Advisory.

Workarounds

• Remove River Past Audio Converter 7.7.16 from production systems if not required
• Restrict physical and remote access to systems running the vulnerable application
• Implement endpoint protection solutions to detect and prevent buffer overflow exploitation
• Consider using alternative audio conversion tools that receive regular security updates
• If the software must be used, operate it in an isolated environment with limited network connectivity

# Identify systems with River Past Audio Converter installed
# Windows PowerShell example
Get-WmiObject -Class Win32_Product | Where-Object { $_.Name -like "*River Past*" }