CVE-2019-25318
📋 TL;DR
CVE-2019-25318 is a stack overflow vulnerability in AVS Audio Converter 9.1.2.600 that allows remote code execution when attackers manipulate the output folder text input. This affects users of this specific software version who process untrusted files or inputs. Successful exploitation gives attackers full control of the affected system.
💻 Affected Systems
- AVS Audio Converter
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker establishing persistent access via bind shell on port 9999, leading to data theft, ransomware deployment, or lateral movement.
Likely Case
Local privilege escalation or remote code execution when processing maliciously crafted files, resulting in system compromise.
If Mitigated
Limited impact with proper network segmentation and application sandboxing, potentially containing the exploit to isolated environments.
🎯 Exploit Status
Exploit requires user interaction (clicking Browse button) but payloads are publicly available. Bind shell on port 9999 is confirmed in exploits.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 9.1.2.601 or later
Vendor Advisory: http://www.avs4you.com/
Restart Required: Yes
Instructions:
1. Download latest version from official AVS website. 2. Uninstall current version. 3. Install updated version. 4. Restart system.
🔧 Temporary Workarounds
Network Segmentation
windowsBlock outbound connections on port 9999 to prevent bind shell communication
netsh advfirewall firewall add rule name="Block AVS Exploit" dir=out action=block protocol=TCP localport=9999
Application Restriction
windowsUse application control policies to restrict AVS Audio Converter execution
🧯 If You Can't Patch
- Uninstall AVS Audio Converter 9.1.2.600 completely
- Implement strict network monitoring for connections to port 9999 and block all outbound traffic from affected systems
🔍 How to Verify
Check if Vulnerable:
Check Help > About in AVS Audio Converter for version number. If version is 9.1.2.600, system is vulnerable.Check Version:
Not applicable - check via GUI onlyVerify Fix Applied:
Verify version is 9.1.2.601 or later in Help > About menu.📡 Detection & Monitoring
Log Indicators:
- Unusual process creation from AVS4YOU directory
- AVS Audio Converter crash logs with overflow patterns
Network Indicators:
- Outbound TCP connections to port 9999 from AVS Audio Converter process
- Unusual network traffic following application crashes
SIEM Query:
Process Creation where Image contains "AVS" AND DestinationPort = 9999