CVE-2025-29901 in File Station 5
Summary
by MITRE • 08/26/2025
A NULL pointer dereference vulnerability has been reported to affect File Station 5. If a remote attacker gains a user account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack.
We have already fixed the vulnerability in the following version: File Station 5 5.5.6.4933 and later
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Analysis
by VulDB Data Team • 09/15/2025
This vulnerability represents a critical null pointer dereference flaw within File Station 5 software that can be exploited by authenticated attackers to execute denial-of-service attacks. The issue manifests when a remote attacker who has already compromised a user account can manipulate the application's memory handling to trigger a null pointer dereference condition. Such vulnerabilities typically occur when an application attempts to access memory at a null pointer address, causing the process to crash and terminate unexpectedly. The vulnerability classification aligns with CWE-476 which specifically addresses NULL pointer dereference conditions in software implementations. From an operational security perspective, this weakness creates a significant risk as it requires only a valid user account to exploit, making it particularly dangerous in environments where user access controls may be insufficient or compromised.
The technical exploitation of this vulnerability demonstrates a fundamental flaw in the application's input validation and memory management processes. When a malicious user submits crafted input or performs specific operations within the File Station 5 interface, the application fails to properly validate pointer references before dereferencing them, leading to a system crash. This type of vulnerability is particularly concerning because it can be leveraged to disrupt legitimate service availability without requiring advanced privileges or sophisticated attack techniques. The DoS attack vector can effectively prevent authorized users from accessing file sharing services, potentially causing operational disruption and impacting business continuity. The vulnerability is categorized under the MITRE ATT&CK framework as a privilege escalation technique that can lead to service disruption and availability compromise.
The remediation approach for this vulnerability involves upgrading to File Station 5 version 5.5.6.4933 or later, which contains the necessary code fixes to prevent null pointer dereference conditions. Security practitioners should prioritize this update across all affected systems to prevent potential exploitation. The fix typically involves implementing proper null pointer checks before memory dereferencing operations, ensuring that all pointer variables are validated before use. Organizations should also consider implementing additional monitoring and logging mechanisms to detect potential exploitation attempts, as null pointer dereference attacks can sometimes be used as precursors to more sophisticated attacks. The vulnerability serves as a reminder of the importance of thorough code review processes and input validation in preventing common software flaws that can lead to service disruption and availability issues.
This vulnerability highlights the broader challenge of maintaining software security in file sharing applications where user authentication is the primary access control mechanism. The fact that exploitation requires only a valid user account demonstrates how insufficient session management and input validation can create dangerous attack surfaces. Security teams should implement comprehensive patch management processes to ensure timely deployment of security fixes and consider conducting vulnerability assessments to identify similar flaws in other applications. The remediation process should include thorough testing to ensure that the patch does not introduce regressions in functionality while maintaining the security improvements. Organizations should also review their incident response procedures to handle potential DoS attacks that may be attempted through this vulnerability, ensuring that service restoration processes are in place to minimize operational impact during security incidents.