CVE-2025-15682 in TLogger
Summary
by MITRE • 08/10/2026
TBEA TLogger V2.1.0.0B0.0.0.0 contains an unauthenticated resource exhaustion vulnerability in its web server. An unauthenticated remote attacker can send PUT requests to the /tmp/ endpoint, causing the web server to create persistent files containing attacker-controlled data under /opt/myapp/webserver/. The generated files are not removed because the web server attempts to move them into a non-existent directory. Repeated requests can therefore exhaust available storage and cause a denial-of-service condition.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 08/10/2026
The TBEA TLogger V2.1.0.0 web server implementation contains a critical resource exhaustion vulnerability that stems from improper input validation and file handling mechanisms. This vulnerability exists in the /tmp/ endpoint which accepts unauthenticated PUT requests without adequate authorization checks or resource limits. The flaw allows remote attackers to upload files containing arbitrary data to the system's temporary storage area, creating persistent files under the /opt/myapp/webserver/ directory structure. According to CWE-400, this represents a classic resource exhaustion vulnerability where attacker-controlled data consumption leads to system instability and potential service disruption.
The technical implementation of this vulnerability demonstrates poor error handling and directory management within the web server's file upload mechanism. When PUT requests are received, the system attempts to move uploaded files from temporary storage into a target directory that does not exist on the filesystem. This misconfiguration causes the system to fail silently while still creating the initial files in the /opt/myapp/webserver/ directory. The lack of proper cleanup mechanisms means these files accumulate over time, consuming available disk space without any automatic removal process. The vulnerability operates entirely at the application layer and requires no authentication, making it particularly dangerous as it can be exploited by anyone with network access to the affected system.
The operational impact of this vulnerability extends beyond simple denial-of-service conditions to potentially compromise system integrity and availability. Repeated exploitation of this endpoint can lead to complete storage exhaustion, causing the web server to become unresponsive or crash entirely. This scenario creates a persistent availability issue that affects legitimate users and can be easily weaponized by attackers seeking to disrupt services. The vulnerability also introduces potential security concerns beyond immediate denial-of-service, as the attacker-controlled files may contain malicious content that could be executed or leveraged for further exploitation. According to ATT&CK framework technique T1499.004, this represents a resource exhaustion attack that can be used to deny access to system resources and services.
Mitigation strategies for this vulnerability must address both immediate protection and long-term architectural improvements. The most effective immediate solution involves implementing authentication requirements for all PUT requests to the /tmp/ endpoint, ensuring that only authorized users can upload files to the system. Additionally, the web server should be configured with proper directory validation and automatic cleanup mechanisms to prevent accumulation of temporary files. Implementing rate limiting and resource quotas on file uploads would further reduce the impact of potential exploitation attempts. The system architecture should include proper error handling that prevents silent failures in file movement operations and ensures that all temporary files are properly cleaned up regardless of whether they can be moved to their intended destination. Organizations should also consider implementing monitoring solutions that can detect unusual file creation patterns and alert administrators to potential exploitation attempts.
The vulnerability highlights fundamental security weaknesses in the TBEA TLogger implementation that align with common misconfigurations found in web applications. The absence of proper input validation, lack of authentication checks for sensitive endpoints, and poor error handling represent multiple security controls that should be in place to protect against such attacks. This issue demonstrates why comprehensive security testing including penetration testing and vulnerability scanning should be performed regularly on all web server implementations. The configuration management process should also include regular review of file permissions and directory structures to ensure that temporary storage areas are properly secured and monitored for unauthorized access attempts. Proper security awareness training for developers working with web applications is essential to prevent similar issues from occurring in future releases of the software.