CVE-2019-25350: XMedia Recode DOS Vulnerability

CVE-2019-25350 Overview

CVE-2019-25350 is a Denial of Service vulnerability affecting XMedia Recode version 3.4.8.6, a popular multimedia transcoding application. The vulnerability allows attackers to crash the application by loading a specially crafted .m3u playlist file. By creating a malicious .m3u file containing an oversized buffer, an attacker can trigger an application crash when the file is opened by an unsuspecting user.

Critical Impact

Attackers can cause application crashes and service disruption by tricking users into opening malicious playlist files, potentially leading to data loss and workflow interruption.

Affected Products

• XMedia Recode 3.4.8.6

Discovery Timeline

• 2026-02-18 - CVE-2019-25350 published to NVD
• 2026-02-19 - Last updated in NVD database

Technical Details for CVE-2019-25350

Vulnerability Analysis

This vulnerability is classified under CWE-770 (Allocation of Resources Without Limits or Throttling). The flaw exists in how XMedia Recode handles .m3u playlist files during the parsing process. When the application attempts to process a playlist file, it fails to properly validate the size or structure of the input data before allocating memory resources.

The local attack vector requires user interaction, meaning an attacker must convince a victim to open a malicious .m3u file. This could be achieved through social engineering tactics such as distributing the malicious file via email, file-sharing platforms, or embedding it within seemingly legitimate media archives.

Root Cause

The root cause of this vulnerability stems from improper resource allocation controls in XMedia Recode's playlist parsing functionality. When processing .m3u files, the application does not enforce appropriate limits on buffer sizes or validate the integrity of the playlist content before attempting to load it into memory. This lack of boundary checking allows an attacker to craft an oversized buffer payload that overwhelms the application's memory handling capabilities, resulting in a crash.

Attack Vector

The attack requires local access and user interaction to be successful. An attacker would typically create a malicious .m3u playlist file containing an excessively large buffer payload. The attack flow proceeds as follows:

1. Attacker crafts a .m3u file with an oversized buffer designed to trigger the resource allocation flaw
2. The malicious file is distributed to the target via email attachment, download link, or other file transfer methods
3. When the victim opens the file with XMedia Recode 3.4.8.6, the application attempts to parse the playlist
4. The oversized buffer triggers the resource exhaustion condition, causing the application to crash

Technical details and proof-of-concept information are available through the Exploit-DB #47679 entry and the VulnCheck Advisory.

Detection Methods for CVE-2019-25350

Indicators of Compromise

• Presence of unusually large .m3u playlist files in user download directories or email attachments
• Unexpected XMedia Recode application crashes or terminations
• System logs indicating application failures related to memory allocation or buffer handling
• Suspicious .m3u files with abnormal file sizes (significantly larger than typical playlist files)

Detection Strategies

• Monitor for XMedia Recode process crashes and correlate with recent file access events
• Implement file integrity monitoring to detect suspicious .m3u files entering the environment
• Configure endpoint detection rules to flag abnormally sized playlist files
• Review application event logs for repeated crash patterns in XMedia Recode

Monitoring Recommendations

• Enable application crash logging and forward events to your SIEM for analysis
• Monitor file system activity for .m3u files in common download locations
• Configure alerts for repeated application failures that may indicate exploitation attempts
• Track incoming email attachments with .m3u extensions for potential malicious payloads

How to Mitigate CVE-2019-25350

Immediate Actions Required

• Upgrade XMedia Recode to a version newer than 3.4.8.6 if available
• Implement file type filtering to block or quarantine .m3u files from untrusted sources
• Educate users about the risks of opening playlist files from unknown sources
• Consider restricting XMedia Recode usage until a patched version is deployed

Patch Information

Users should check the XMedia Recode Official Site and XMedia Recode Download Page for the latest version of the application that addresses this vulnerability. Upgrading to the most recent release is the recommended remediation approach.

Workarounds

• Disable automatic file associations for .m3u files with XMedia Recode
• Implement email filtering rules to block or quarantine .m3u attachments
• Use application allowlisting to prevent execution of potentially compromised media files
• Configure group policy to restrict .m3u file handling until patches are applied

# Example: Block .m3u file associations on Windows (run as Administrator)
# Remove XMedia Recode association with .m3u files
assoc .m3u=
ftype m3ufile=

# Alternative: Rename or restrict access to vulnerable executable
# until update is available
icacls "C:\Program Files\XMedia Recode\XMedia Recode.exe" /deny Everyone:X