CVE-2019-25593: jetCast Server 2.0 DoS Vulnerability

CVE-2019-25593 Overview

CVE-2019-25593 is a denial of service vulnerability affecting jetCast Server 2.0. The vulnerability allows local attackers to crash the application by supplying an excessively long string in the Log directory configuration field. By pasting a buffer of 5000 characters into the Log directory input and clicking Start, an attacker can trigger a crash that terminates the server process, resulting in service disruption.

Critical Impact

Local attackers can cause complete service disruption by crashing the jetCast Server process through improper size or length validation in the Log directory configuration field.

Affected Products

• jetCast Server 2.0

Discovery Timeline

• 2026-03-22 - CVE CVE-2019-25593 published to NVD
• 2026-03-23 - Last updated in NVD database

Technical Details for CVE-2019-25593

Vulnerability Analysis

This vulnerability stems from improper validation of size or length parameters in the Log directory configuration field of jetCast Server 2.0. The application fails to properly validate the length of user-supplied input before processing, allowing excessively long strings to be submitted. When the server attempts to process the oversized input, it triggers a crash condition that terminates the entire server process.

The vulnerability is classified under CWE-1285 (Improper Validation of Specified Quantity in Input), which describes scenarios where software receives input that is expected to specify a quantity but does not validate or incorrectly validates that the quantity has the required properties. In this case, the application does not enforce appropriate bounds on the Log directory path length.

Root Cause

The root cause of this vulnerability is the lack of proper input length validation in the Log directory configuration handler. The application accepts user input for the Log directory path without checking whether the supplied string exceeds acceptable buffer limits. When an attacker provides a string of approximately 5000 characters, the application cannot properly handle this oversized input, leading to memory corruption or an unhandled exception that crashes the server.

Attack Vector

This is a local attack vector that requires user interaction. An attacker with local access to the jetCast Server configuration interface can exploit this vulnerability by:

1. Accessing the jetCast Server configuration panel
2. Navigating to the Log directory configuration field
3. Pasting approximately 5000 characters of arbitrary text into the field
4. Clicking the Start button to initiate the server

The server process will crash upon attempting to process the oversized Log directory path, resulting in denial of service. Technical details regarding exploitation can be found in the Exploit-DB #46819 advisory.

Detection Methods for CVE-2019-25593

Indicators of Compromise

• Unexpected jetCast Server process termination or crash events
• Windows Event Log entries indicating application crashes for the jetCast Server executable
• Abnormally long strings in Log directory configuration files
• Repeated server restarts without configuration changes

Detection Strategies

• Monitor Windows Application Event Logs for crash events associated with jetCast Server processes
• Implement file integrity monitoring on jetCast Server configuration files to detect unauthorized modifications
• Configure endpoint detection rules to alert on application crashes following configuration changes
• Deploy SentinelOne Singularity to detect and alert on process termination anomalies

Monitoring Recommendations

• Enable detailed logging for jetCast Server configuration changes
• Set up alerts for unexpected service interruptions on systems running jetCast Server
• Monitor for repeated crash-restart cycles that may indicate exploitation attempts
• Implement application whitelisting to restrict unauthorized configuration modifications

How to Mitigate CVE-2019-25593

Immediate Actions Required

• Restrict local access to systems running jetCast Server 2.0 to trusted administrators only
• Consider replacing jetCast Server 2.0 with an alternative streaming solution if available
• Implement application-level access controls to prevent unauthorized configuration changes
• Deploy endpoint protection solutions such as SentinelOne to monitor for exploitation attempts

Patch Information

No official patch information is available from the vendor for this vulnerability. The product appears to be legacy software. Organizations should consult the JetAudio Official Website for any potential updates or consider migrating to supported streaming server solutions.

Additional technical details are available through the VulnCheck JetCast Advisory.

Workarounds

• Restrict physical and remote access to the jetCast Server management interface
• Implement role-based access controls to limit who can modify server configuration settings
• Consider running jetCast Server in an isolated environment with limited network exposure
• Monitor the Log directory configuration field for any unauthorized or suspiciously long entries
• Implement application sandboxing to limit the impact of potential crashes

Since no verified code examples are available, administrators should consult the official vendor resources and the Exploit-DB #46819 entry for additional technical implementation details regarding input validation workarounds.