CVE-2019-25332: FTP Commander Pro RCE Vulnerability

CVE-2019-25332 Overview

FTP Commander Pro 8.03 contains a local stack overflow vulnerability (CWE-121) that allows attackers to execute arbitrary code by overwriting the EIP register through a custom command input. This vulnerability enables attackers to craft a malicious payload of 4108 bytes to overwrite memory and execute shellcode, demonstrating remote code execution potential.

Critical Impact

Attackers can achieve arbitrary code execution by exploiting the stack overflow to overwrite the EIP register, potentially gaining full control of the affected system.

Affected Products

• FTP Commander Pro version 8.03
• Earlier versions of FTP Commander Pro may also be affected

Discovery Timeline

• 2026-02-12 - CVE CVE-2019-25332 published to NVD
• 2026-02-12 - Last updated in NVD database

Technical Details for CVE-2019-25332

Vulnerability Analysis

This vulnerability is a classic stack-based buffer overflow (CWE-121) present in FTP Commander Pro 8.03. The application fails to properly validate the length of user-supplied input when processing custom commands. When an attacker provides input exceeding the expected buffer size, the excess data overwrites adjacent memory on the stack, including the saved return address (EIP register on x86 architectures).

The attack requires local access and user interaction to trigger the vulnerable code path. Once exploited, an attacker can achieve high impact to confidentiality, integrity, and availability of the system, as they gain the ability to execute arbitrary code in the context of the application.

Root Cause

The root cause of this vulnerability is insufficient input validation and the absence of proper bounds checking when handling user-controlled data in the command processing functionality. The application allocates a fixed-size buffer on the stack but does not verify that incoming data fits within this allocation before copying it, leading to a classic stack buffer overflow condition.

Attack Vector

The attack vector is local, requiring the attacker to either have direct access to the system or convince a user to open a malicious file or input. The exploitation technique involves:

1. Crafting a payload of approximately 4108 bytes designed to overflow the vulnerable buffer
2. Carefully positioning shellcode and the overwritten return address within the payload
3. Triggering the vulnerable custom command functionality with the malicious input
4. Upon function return, execution transfers to attacker-controlled code

The vulnerability has been documented in multiple Exploit-DB entries (#37810 and #47775), indicating that public exploitation techniques are available. For detailed technical information on the exploitation mechanics, refer to the VulnCheck Advisory.

Detection Methods for CVE-2019-25332

Indicators of Compromise

• Unusual crashes or application termination of FTP Commander Pro processes
• Evidence of shellcode execution or suspicious child processes spawned from ftpcommander.exe
• Memory dump analysis showing buffer overflow patterns with 4108+ byte payloads
• Anomalous command input patterns in application logs

Detection Strategies

• Deploy endpoint detection and response (EDR) solutions capable of detecting stack-based buffer overflow exploitation techniques
• Monitor for DEP (Data Execution Prevention) and ASLR bypass attempts on systems running FTP Commander Pro
• Implement application whitelisting to prevent unauthorized code execution
• Use behavior-based detection to identify anomalous process creation from FTP client applications

Monitoring Recommendations

• Enable crash dump collection for FTP Commander Pro to capture exploitation attempts
• Monitor system event logs for application crashes with stack corruption signatures
• Configure security information and event management (SIEM) rules to alert on suspicious FTP client behavior
• Review endpoint telemetry for indicators of code injection or shellcode execution

How to Mitigate CVE-2019-25332

Immediate Actions Required

• Consider discontinuing use of FTP Commander Pro 8.03 until a patched version is available
• Restrict access to systems running the vulnerable software to trusted users only
• Implement application control policies to limit execution of unknown or modified binaries
• Enable DEP and ASLR system-wide to make exploitation more difficult

Patch Information

No official patch information is currently available from the vendor. Users should check the Internet Soft Homepage for any security updates or newer versions that may address this vulnerability. Consider migrating to alternative FTP client software with active security maintenance.

Workarounds

• Avoid processing untrusted or malicious input through FTP Commander Pro custom commands
• Run FTP Commander Pro with minimal user privileges to limit the impact of successful exploitation
• Deploy network segmentation to isolate systems running vulnerable software
• Use application sandboxing technologies to contain potential exploitation

# Configuration example: Enable DEP and ASLR enforcement on Windows
# Run in elevated PowerShell to verify DEP status
Get-ProcessMitigation -Name ftpcommander.exe

# Enable DEP for FTP Commander Pro
Set-ProcessMitigation -Name ftpcommander.exe -Enable DEP

# Verify ASLR is enabled system-wide
Get-ProcessMitigation -System