CVE-2019-25645 Overview
CVE-2019-25645 is a denial of service vulnerability affecting WinAVI iPod/3GP/MP4/PSP Converter version 4.4.2. This media conversion software contains a flaw that allows local attackers to crash the application by processing maliciously crafted AVI files. Attackers can exploit this vulnerability by creating a specially crafted AVI file with an oversized buffer and loading it through the "Convert to iPhone" function, triggering an application crash.
Critical Impact
Local attackers can cause application crashes and service disruption by exploiting improper input validation when processing AVI media files.
Affected Products
- WinAVI iPod/3GP/MP4/PSP Converter version 4.4.2
Discovery Timeline
- 2026-03-24 - CVE-2019-25645 published to NVD
- 2026-03-24 - Last updated in NVD database
Technical Details for CVE-2019-25645
Vulnerability Analysis
This vulnerability stems from improper handling of AVI file input within the WinAVI converter application. When processing AVI files through the "Convert to iPhone" functionality, the application fails to properly validate the size and structure of input buffers. An attacker can craft a malicious AVI file containing an oversized buffer that exceeds expected boundaries, causing the application to crash when attempting to process the file.
The vulnerability is classified under CWE-226 (Sensitive Information in Resource Not Removed Before Reuse), though the primary impact manifests as a denial of service condition. The local attack vector requires user interaction, as the victim must open the malicious file within the vulnerable application.
Root Cause
The root cause of this vulnerability lies in insufficient input validation when parsing AVI file structures. The application does not adequately verify buffer sizes before processing, allowing malformed media files to trigger memory handling errors that result in application crashes.
Attack Vector
Exploitation requires local access to the target system. An attacker must convince a user to open a specially crafted AVI file using WinAVI iPod/3GP/MP4/PSP Converter's "Convert to iPhone" feature. When the malformed file is processed, the oversized buffer causes the application to crash, resulting in a denial of service condition. While this vulnerability requires user interaction, social engineering techniques could be employed to deliver the malicious file to potential victims.
The vulnerability mechanism involves malformed AVI file parsing through the converter's iPhone conversion functionality. When an AVI file with an improperly sized buffer is loaded, the application fails to handle the boundary condition correctly, leading to an uncontrolled crash. For detailed technical information, see the Exploit-DB #46554 advisory.
Detection Methods for CVE-2019-25645
Indicators of Compromise
- Unexpected crashes of WinAVI iPod/3GP/MP4/PSP Converter application
- Presence of unusually large or malformed AVI files on the system
- Application error logs indicating memory-related exceptions during file conversion operations
Detection Strategies
- Monitor for repeated application crashes of WinAVI processes
- Implement file integrity monitoring for media files accessed by the converter application
- Deploy endpoint detection rules to identify crash patterns associated with media file processing
Monitoring Recommendations
- Enable application crash logging and analyze crash dumps for patterns indicating exploitation attempts
- Monitor filesystem activity for AVI files with anomalous sizes or structures being accessed by the converter application
- Implement user behavior analytics to detect unusual patterns of media file access
How to Mitigate CVE-2019-25645
Immediate Actions Required
- Avoid opening AVI files from untrusted or unknown sources using WinAVI iPod/3GP/MP4/PSP Converter
- Consider using alternative media conversion software that has active security maintenance
- Educate users about the risks of processing media files from untrusted sources
Patch Information
No official patch has been identified for this vulnerability. The vendor has not released updated software to address this issue. Organizations should consider migrating to actively maintained media conversion solutions. For additional information, refer to the VulnCheck Advisory for WinAVI.
Workarounds
- Use application sandboxing to isolate the converter software and limit crash impact
- Implement strict file source policies to prevent processing of untrusted media files
- Consider replacing the vulnerable software with a supported alternative converter application
# Application restriction example - limit file access for vulnerable application
# Windows AppLocker policy to restrict AVI file sources
# Adjust paths according to your environment
# Create a folder for trusted media files only
mkdir C:\TrustedMedia
# Only allow WinAVI to access files from trusted locations
# Configure via Windows Software Restriction Policies or AppLocker
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
