CVE-2025-6806: Marvell Qconvergeconsole Path Traversal

CVE-2025-6806 Overview

CVE-2025-6806 is a directory traversal vulnerability affecting Marvell QConvergeConsole that allows remote attackers to create arbitrary files on affected installations. The vulnerability exists within the implementation of the decryptFile method, where insufficient validation of user-supplied paths enables attackers to write files outside intended directories. This flaw can be exploited without authentication, making it particularly dangerous for exposed installations.

Critical Impact

Remote attackers can leverage this vulnerability to write arbitrary files in the context of SYSTEM without authentication, potentially leading to complete system compromise.

Affected Products

• Marvell QConvergeConsole (all versions)

Discovery Timeline

• 2025-07-07 - CVE-2025-6806 published to NVD
• 2025-07-14 - Last updated in NVD database

Technical Details for CVE-2025-6806

Vulnerability Analysis

This vulnerability is classified as CWE-22 (Improper Limitation of a Pathname to a Restricted Directory), commonly known as path traversal or directory traversal. The flaw enables remote attackers to manipulate file paths processed by the decryptFile method to write files to arbitrary locations on the filesystem. Since the vulnerability can be exploited over the network without requiring any authentication or user interaction, it presents a significant risk to organizations running affected versions of QConvergeConsole.

The vulnerability was initially tracked as ZDI-CAN-24979 by the Zero Day Initiative before receiving its CVE designation. When successfully exploited, attackers can write files with SYSTEM-level privileges, which could facilitate further attacks including privilege escalation, persistence mechanisms, or complete system compromise.

Root Cause

The root cause of this vulnerability lies in the inadequate validation of user-supplied path parameters within the decryptFile method. The application fails to properly sanitize input paths before using them in file operations, allowing attackers to inject path traversal sequences (such as ../) to escape the intended directory structure. This oversight enables file writes to arbitrary locations on the target filesystem.

Attack Vector

The vulnerability is exploitable remotely over the network. An attacker can craft malicious requests containing specially crafted path sequences targeting the decryptFile method. By including directory traversal characters in the file path parameter, the attacker can direct file writes to locations outside the application's intended working directory. The attack requires no authentication, making any network-accessible installation a potential target.

The exploitation flow involves sending a request to the vulnerable decryptFile endpoint with a manipulated path containing traversal sequences. The application processes this path without adequate validation, ultimately writing attacker-controlled content to an attacker-specified location on the filesystem with SYSTEM privileges.

Detection Methods for CVE-2025-6806

Indicators of Compromise

• Unexpected file creation or modification in system directories outside of QConvergeConsole's normal working paths
• Web server logs showing requests to the decryptFile endpoint containing path traversal sequences like ../ or ..\\
• Suspicious SYSTEM-level file operations originating from the QConvergeConsole process
• New or modified files in sensitive locations such as system startup directories or configuration paths

Detection Strategies

• Monitor HTTP/HTTPS traffic for requests targeting QConvergeConsole endpoints containing directory traversal patterns (../, ..\\, URL-encoded variants like %2e%2e%2f)
• Implement file integrity monitoring (FIM) on critical system directories to detect unauthorized file creation
• Deploy web application firewall (WAF) rules to block requests containing path traversal sequences
• Analyze QConvergeConsole process behavior for file operations outside expected directories

Monitoring Recommendations

• Enable detailed logging for the QConvergeConsole application to capture all file operation requests
• Configure SIEM alerts for path traversal patterns in web server access logs
• Monitor for unusual SYSTEM-level file write operations correlating with QConvergeConsole process activity
• Implement network-level monitoring to detect exploitation attempts targeting exposed QConvergeConsole installations

How to Mitigate CVE-2025-6806

Immediate Actions Required

• Restrict network access to QConvergeConsole installations to trusted management networks only
• Implement network segmentation to isolate systems running vulnerable QConvergeConsole versions
• Deploy web application firewall rules to filter requests containing directory traversal patterns
• Review systems for signs of compromise if QConvergeConsole has been exposed to untrusted networks
• Monitor the Zero Day Initiative Advisory ZDI-25-462 for updates

Patch Information

Organizations should monitor Marvell's security advisories for the release of an official patch addressing CVE-2025-6806. Until a patch is available, implementing the recommended workarounds and access controls is essential to reduce exposure risk.

Workarounds

• Restrict access to QConvergeConsole to trusted administrative networks using firewall rules
• Implement reverse proxy or WAF in front of QConvergeConsole with strict input validation rules
• Disable or block access to the vulnerable decryptFile endpoint if not required for operations
• Consider temporarily disabling QConvergeConsole if exposure cannot be adequately mitigated

# Example firewall rule to restrict QConvergeConsole access (adjust ports as needed)
# iptables - Allow only from trusted management network
iptables -A INPUT -p tcp --dport 8080 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 8080 -j DROP