CVE-2023-4528 in MFT Server
Summary
by MITRE • 09/07/2023
Unsafe deserialization in JSCAPE MFT Server versions prior to 2023.1.9 (Windows, Linux, and MacOS) permits an attacker to run arbitrary Java code (including OS commands) via its management interface
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Analysis
by VulDB Data Team • 10/04/2023
The vulnerability identified as CVE-2023-4528 represents a critical unsafe deserialization flaw within JSCAPE MFT Server software across multiple operating systems including Windows, Linux, and MacOS. This vulnerability affects versions prior to 2023.1.9 and specifically targets the management interface of the application. The flaw stems from the application's improper handling of serialized data structures during the deserialization process, creating an avenue for remote code execution attacks.
The technical nature of this vulnerability aligns with CWE-502 which specifically addresses unsafe deserialization in software applications. When the JSCAPE MFT Server processes serialized data through its management interface, it fails to properly validate or sanitize the incoming data before attempting to deserialize it. This allows an attacker to craft malicious serialized objects that, when processed by the vulnerable application, trigger arbitrary Java code execution. The implications extend beyond simple code execution to include the ability to run operating system commands directly through the Java runtime environment, effectively granting attackers complete control over the affected system.
The operational impact of this vulnerability is severe and far-reaching for organizations utilizing JSCAPE MFT Server software. Attackers can exploit this weakness remotely without requiring authentication, making it particularly dangerous for systems exposed to untrusted networks. Once exploited, the vulnerability allows for complete system compromise including data exfiltration, lateral movement within network environments, and establishment of persistent backdoors. The management interface serves as a prime target since it typically requires elevated privileges and provides administrative access to the file transfer server functionality, making the attack surface particularly valuable to threat actors.
Organizations should immediately implement mitigations including upgrading to JSCAPE MFT Server version 2023.1.9 or later which contains the necessary patches to address this vulnerability. Network segmentation should be implemented to restrict access to the management interface to trusted administrative networks only, while disabling unnecessary remote access capabilities. Additional protective measures include implementing web application firewalls to monitor and filter deserialization requests, enabling strict input validation on all user-supplied data, and conducting thorough network monitoring to detect potential exploitation attempts. The ATT&CK framework categorizes this vulnerability under T1210 - Exploitation of Remote Services and T1059 - Command and Scripting Interpreter, highlighting the multi-faceted nature of the attack vectors available to adversaries. Regular security assessments and penetration testing should be conducted to identify similar vulnerabilities in other applications within the organization's attack surface, while security teams must maintain continuous monitoring for indicators of compromise related to this specific vulnerability.