CVE-2025-61582 in ts3-manager
Summary
by MITRE • 10/02/2025
TS3 Manager is modern web interface for maintaining Teamspeak3 servers. A Denial of Dervice vulnerability has been identified in versions 2.2.1 and earlier. The vulnerability permits an unauthenticated actor to crash the application through the submission of specially crafted Unicode input, requiring no prior authentication or privileges. The flaw manifests when Unicode tag characters are submitted to the Server field on the login page. The application fails to properly handle these characters during the ASCII conversion process, resulting in an unhandled exception that terminates the application within four to five seconds of submission. This issue is fixed in version 2.2.2.
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Analysis
by VulDB Data Team • 10/02/2025
The vulnerability identified as CVE-2025-61582 affects TS3 Manager, a modern web interface designed for Teamspeak3 server administration. This application serves as a critical management tool for voice communication platforms, making its stability and security paramount for users operating Teamspeak3 environments. The flaw represents a significant concern as it allows unauthenticated attackers to disrupt service availability without requiring any credentials or privileged access, fundamentally compromising the system's reliability and operational continuity. The vulnerability specifically targets the application's input validation mechanisms within the login page interface, where user-submitted data undergoes processing before being utilized by the system's core components.
The technical implementation of this vulnerability stems from inadequate Unicode handling during the ASCII conversion process within the Server field validation. When maliciously crafted Unicode tag characters are submitted through the login form, the application's processing pipeline fails to properly sanitize or handle these special characters, leading to an unhandled exception that cascades into application termination. This type of vulnerability aligns with CWE-170, which addresses improper handling of Unicode characters, and demonstrates a classic example of input validation failure that can lead to application instability. The precise nature of the flaw suggests that the application's string processing functions do not adequately account for the full range of Unicode character encodings, particularly those that may contain null bytes or other special control characters that can disrupt normal execution flow.
The operational impact of this vulnerability extends beyond simple service disruption, as it creates an avenue for attackers to systematically crash the TS3 Manager application through automated or manual submission of malicious input. The timeframe of four to five seconds for application termination indicates that the vulnerability triggers an immediate exception handling failure rather than a gradual resource exhaustion, making it particularly effective for denial of service attacks. This rapid termination cycle can be exploited repeatedly, potentially leading to sustained service unavailability for legitimate users who require access to the Teamspeak3 server management interface. The vulnerability's exploitation requires no authentication credentials, making it accessible to any external actor with network access to the application, which fundamentally undermines the security posture of systems relying on this management tool.
Security mitigations for this vulnerability should focus on comprehensive input sanitization and validation mechanisms that properly handle Unicode character sets before any processing occurs. The fix implemented in version 2.2.2 demonstrates the necessity of robust character encoding handling and proper exception management within web applications. Organizations should implement immediate patching procedures to upgrade to version 2.2.2 or later, while also considering additional defensive measures such as input filtering at network boundaries and monitoring for suspicious character patterns in application logs. The vulnerability's characteristics align with ATT&CK technique T1499.004, which covers network denial of service, and represents a critical weakness that could be exploited as part of broader attack campaigns targeting communication infrastructure. System administrators should also implement logging controls to detect and respond to potential exploitation attempts, ensuring that the application's stability and availability are maintained for legitimate users requiring Teamspeak3 server management capabilities.