CVE-2019-25609 in jetCast Server
Summary
by MITRE • 03/22/2026
JetAudio jetCast Server 2.0 contains a stack-based buffer overflow vulnerability in the Log Directory configuration field that allows local attackers to overwrite structured exception handling pointers. Attackers can inject alphanumeric encoded shellcode through the Log Directory field to trigger an SEH exception handler and execute arbitrary code with application privileges.
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Analysis
by VulDB Data Team • 03/22/2026
The vulnerability identified as CVE-2019-25609 affects JetAudio jetCast Server version 2.0 and represents a critical stack-based buffer overflow flaw that resides within the Log Directory configuration field. This type of vulnerability falls under the Common Weakness Enumeration category CWE-121, which specifically addresses stack-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory locations including critical exception handling structures. The flaw manifests when the application processes user-supplied input through the Log Directory configuration parameter, creating an exploitable condition that can be leveraged by local attackers with system-level privileges.
The technical execution of this vulnerability involves a sophisticated attack vector that targets the structured exception handling mechanism within the Windows operating system. When an attacker provides malicious input through the Log Directory field, the application fails to properly validate or limit the input length, allowing the buffer overflow to occur. This overflow specifically overwrites the structured exception handling pointers, which are critical components that manage how the application handles unexpected errors and exceptions. The exploitation technique requires attackers to inject alphanumeric encoded shellcode that is carefully crafted to align with the memory layout and exception handling structures, enabling the execution of arbitrary code within the context of the jetCast Server application. This approach aligns with the ATT&CK framework's technique T1059.007 for command and script interpreter execution, where attackers leverage application vulnerabilities to execute malicious payloads.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with complete control over the affected system through the jetCast Server application privileges. Local attackers who successfully exploit this vulnerability can manipulate the server's functionality, potentially leading to unauthorized access to audio streaming services, data exfiltration, or further escalation within the network environment. The attack requires local system access but does not necessitate network connectivity, making it particularly dangerous in environments where local privileges are more easily obtained. Organizations using JetAudio jetCast Server 2.0 are at significant risk, as the vulnerability can be exploited by any user with local access to the system, including malicious insiders or compromised accounts with local privileges.
Mitigation strategies for CVE-2019-25609 should prioritize immediate patching of the affected software to address the buffer overflow condition. Organizations must implement proper input validation and bounds checking mechanisms to prevent similar vulnerabilities from occurring in other applications. The principle of least privilege should be enforced to limit local access rights and reduce the attack surface available to potential exploiters. Additionally, implementing application whitelisting policies and monitoring for unusual exception handling behaviors can help detect exploitation attempts. System administrators should also consider disabling unnecessary features such as the Log Directory configuration field if it is not required for operations, thereby reducing potential attack vectors. Regular security assessments and vulnerability scanning should be conducted to identify similar buffer overflow conditions in other applications and systems within the organization's infrastructure. The vulnerability demonstrates the importance of proper memory management practices and the critical need for robust input validation in all software development processes to prevent such exploitable conditions from being introduced into production environments.