CVE-1999-1567 in TestTrack
Summary
by MITRE
Seapine Software TestTrack server allows a remote attacker to cause a denial of service (high CPU) via (1) TestTrackWeb.exe and (2) ttcgi.exe by connecting to port 99 and disconnecting without sending any data.
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Analysis
by VulDB Data Team • 04/19/2026
The vulnerability described in CVE-1999-1567 represents a classic denial of service flaw affecting Seapine Software TestTrack server implementations. This issue specifically targets the TestTrackWeb.exe and ttcgi.exe components that operate on port 99, which serves as the primary communication channel for the TestTrack web interface. The flaw exploits a fundamental weakness in the server's connection handling mechanism where it fails to properly manage empty or malformed connection attempts, creating a condition that can be exploited by remote attackers to consume excessive system resources.
The technical implementation of this vulnerability stems from inadequate input validation and connection state management within the TestTrack server software. When a remote attacker establishes a connection to port 99 and immediately disconnects without transmitting any meaningful data, the server processes this as a legitimate connection attempt but fails to properly terminate the associated resource allocation. This results in the server maintaining active processes or threads that consume significant cpu cycles, effectively creating a resource exhaustion condition that degrades system performance or renders the service unavailable to legitimate users. The vulnerability operates at the network protocol level where the server's response to connection termination lacks proper cleanup mechanisms.
From an operational perspective, this vulnerability presents a substantial risk to organizations relying on TestTrack for software quality management and testing processes. The high cpu consumption resulting from this attack can lead to complete service unavailability, disrupting development workflows and potentially causing significant business impact. The attack vector is particularly concerning because it requires minimal effort from an attacker - simply connecting and disconnecting without sending data - making it an attractive method for causing service disruption. The vulnerability affects systems where TestTrack server components are exposed to untrusted networks, particularly in environments where port 99 is accessible from external networks without proper network segmentation or access controls.
The flaw aligns with common security patterns identified in the CWE (Common Weakness Enumeration) catalog, specifically relating to weak resource management and improper handling of connection states. This vulnerability demonstrates the importance of implementing proper connection lifecycle management and resource cleanup procedures within server applications. From the MITRE ATT&CK framework perspective, this represents a denial of service attack technique that can be categorized under the service disruption category, potentially serving as a precursor to more sophisticated attacks or simply causing operational disruption. Organizations should consider implementing network level protections such as firewall rules to restrict access to port 99, along with proper monitoring to detect unusual cpu usage patterns that may indicate exploitation attempts.
Mitigation strategies should focus on both immediate defensive measures and long-term architectural improvements. Network administrators should implement access controls to limit exposure of port 99 to trusted networks only, while also deploying intrusion detection systems capable of identifying suspicious connection patterns. The most effective long-term solution involves applying vendor patches or updates that address the underlying resource management flaw in TestTrack server implementations. Additionally, implementing connection rate limiting and proper timeout mechanisms can help prevent the accumulation of zombie connections that contribute to the resource exhaustion condition. Regular security assessments should include testing for similar connection handling vulnerabilities in other network services to prevent similar issues from occurring in the broader infrastructure.