CVE-2025-6794: Marvell QConvergeConsole RCE Vulnerability

CVE-2025-6794 Overview

CVE-2025-6794 is a critical directory traversal vulnerability in Marvell QConvergeConsole that enables remote code execution. The vulnerability exists within the implementation of the saveAsText method, which fails to properly validate user-supplied path input before using it in file operations. This flaw allows unauthenticated remote attackers to execute arbitrary code with SYSTEM-level privileges on affected systems.

The vulnerability was disclosed through the Zero Day Initiative (ZDI) under the identifier ZDI-CAN-24913 and has been assigned a critical severity rating due to the combination of network accessibility, lack of authentication requirements, and complete system compromise potential.

Critical Impact

Unauthenticated remote attackers can achieve arbitrary code execution with SYSTEM privileges through directory traversal in the saveAsText method.

Affected Products

• Marvell QConvergeConsole (all versions)

Discovery Timeline

• 2025-07-07 - CVE-2025-6794 published to NVD
• 2025-07-14 - Last updated in NVD database

Technical Details for CVE-2025-6794

Vulnerability Analysis

This vulnerability falls under CWE-22 (Improper Limitation of a Pathname to a Restricted Directory), commonly known as Path Traversal or Directory Traversal. The saveAsText method in Marvell QConvergeConsole accepts a user-controlled path parameter without adequate sanitization or validation.

When processing save operations, the application directly uses the attacker-supplied path in file system operations. By crafting a path containing directory traversal sequences (such as ../ or absolute paths), an attacker can write files to arbitrary locations on the file system. This can be leveraged to overwrite critical system files, plant malicious executables in startup directories, or place web shells in accessible locations, ultimately achieving remote code execution.

The attack does not require any authentication, making it particularly dangerous for internet-facing or network-accessible QConvergeConsole installations. Successful exploitation results in code execution running in the context of SYSTEM, providing the attacker with the highest level of privileges on Windows systems.

Root Cause

The root cause of CVE-2025-6794 is the absence of proper path validation and sanitization within the saveAsText method. The application fails to:

1. Validate that the user-supplied path remains within intended directories
2. Sanitize or reject path traversal sequences (e.g., ../, ..\\)
3. Prevent the use of absolute paths that escape the application's sandbox
4. Implement proper access controls on file write operations

This allows attackers to manipulate the destination path parameter to write files outside the intended directory structure.

Attack Vector

The attack can be executed remotely over the network without any authentication credentials. An attacker would craft a malicious request to the saveAsText endpoint, including directory traversal sequences in the path parameter to target sensitive system locations.

The exploitation flow involves:

1. Identifying a network-accessible QConvergeConsole installation
2. Crafting a request to the saveAsText method with a traversal path
3. Writing a malicious payload (e.g., executable, script, or web shell) to a location that enables code execution
4. Triggering execution of the planted payload to gain SYSTEM-level access

For detailed technical information, refer to the Zero Day Initiative Advisory ZDI-25-454.

Detection Methods for CVE-2025-6794

Indicators of Compromise

• Unexpected file creation or modification in system directories such as C:\Windows\System32\ or startup folders
• Web server logs showing requests to saveAsText endpoints with path traversal patterns (../ or ..\\)
• New executable files, DLLs, or scripts appearing in sensitive locations with recent timestamps
• Unusual SYSTEM-level process activity originating from QConvergeConsole service context

Detection Strategies

• Monitor QConvergeConsole application logs for file operations targeting paths outside the application directory
• Implement network intrusion detection rules to identify HTTP requests containing directory traversal sequences targeting QConvergeConsole
• Deploy file integrity monitoring (FIM) on critical system directories to detect unauthorized file writes
• Analyze process creation events for SYSTEM-level processes spawned from unexpected parent processes

Monitoring Recommendations

• Enable detailed logging for QConvergeConsole file operations and API calls
• Configure SIEM alerts for path traversal patterns in web application logs
• Monitor for new files created in common exploitation target directories (e.g., web roots, startup folders, scheduled task locations)
• Implement network segmentation to limit exposure of QConvergeConsole management interfaces

How to Mitigate CVE-2025-6794

Immediate Actions Required

• Restrict network access to QConvergeConsole management interfaces using firewall rules or network segmentation
• Limit access to trusted administrators from known IP ranges only
• Review file system for any suspicious files that may have been written through exploitation
• Consider temporarily disabling or isolating QConvergeConsole installations until a patch is available

Patch Information

Monitor Marvell security advisories for official patches addressing CVE-2025-6794. Contact Marvell support for remediation guidance and patch availability. Additional technical details are available through the Zero Day Initiative Advisory ZDI-25-454.

Workarounds

• Implement a web application firewall (WAF) rule to block requests containing directory traversal patterns to QConvergeConsole endpoints
• Use network-level access controls to restrict QConvergeConsole access to authorized administrative hosts only
• Deploy host-based intrusion prevention to monitor and block suspicious file write operations from the QConvergeConsole process
• Consider running QConvergeConsole in a sandboxed or containerized environment to limit file system access

# Example: Block external access to QConvergeConsole using iptables
# Replace QCONSOLE_PORT with the actual port number

# Allow access only from management network
iptables -A INPUT -p tcp --dport QCONSOLE_PORT -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport QCONSOLE_PORT -j DROP

# Log blocked connection attempts
iptables -I INPUT -p tcp --dport QCONSOLE_PORT -j LOG --log-prefix "QConsole Blocked: "