CVE-2025-61582
📋 TL;DR
CVE-2025-61582 is a denial-of-service vulnerability in TS3 Manager web interface versions 2.2.1 and earlier. Unauthenticated attackers can crash the application by submitting specially crafted Unicode characters to the Server field on the login page, causing an unhandled exception. All users running vulnerable versions are affected.
💻 Affected Systems
- TS3 Manager
📦 What is this software?
Ts3 Manager by Joni1802
⚠️ Risk & Real-World Impact
Worst Case
Complete application downtime requiring manual restart, potentially disrupting Teamspeak3 server management for extended periods.
Likely Case
Application crashes within 4-5 seconds of attack, requiring administrator intervention to restart service.
If Mitigated
No impact if patched to version 2.2.2 or if workarounds blocking Unicode input are implemented.
🎯 Exploit Status
Simple Unicode payload submission to login form; advisory includes technical details.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.2.2
Vendor Advisory: https://github.com/joni1802/ts3-manager/security/advisories/GHSA-4cq4-hp4f-8w7p
Restart Required: Yes
Instructions:
1. Backup current configuration. 2. Download version 2.2.2 from official repository. 3. Replace existing installation with patched version. 4. Restart TS3 Manager service.
🔧 Temporary Workarounds
Input Validation Filter
allImplement web application firewall or input validation to block Unicode tag characters in Server field.
Access Restriction
allRestrict access to TS3 Manager login page using network controls or authentication proxy.
🧯 If You Can't Patch
- Implement network segmentation to restrict access to TS3 Manager interface
- Deploy web application firewall with rules to detect and block Unicode exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check TS3 Manager version; if 2.2.1 or earlier, vulnerable. Test by submitting Unicode tag characters to Server field.Check Version:
Check TS3 Manager web interface footer or configuration files for version information.Verify Fix Applied:
After patching, attempt to submit Unicode tag characters to Server field; application should handle input gracefully without crashing.📡 Detection & Monitoring
Log Indicators:
- Application crash logs
- Unhandled exception errors related to ASCII conversion
- Repeated login attempts with unusual characters
Network Indicators:
- HTTP POST requests to login endpoint containing Unicode characters
- Sudden drop in application availability
SIEM Query:
source="ts3-manager.log" AND ("unhandled exception" OR "ASCII conversion" OR crash)