CVE-2025-60262: H3C Wireless Device Privilege Escalation

CVE-2025-60262 Overview

A critical misconfiguration vulnerability exists in H3C wireless network devices affecting the vsftpd (Very Secure FTP Daemon) service. This vulnerability allows anonymous FTP uploads where files are automatically assigned root ownership, enabling remote attackers to gain root-level control over affected devices without authentication.

Critical Impact

Remote attackers can exploit anonymous FTP access to upload files with root ownership, potentially leading to complete device compromise and root-level control over H3C wireless infrastructure.

Affected Products

• H3C M102G Wireless Controller (Firmware: HM1A0V200R010)
• H3C BA1500L Wireless Access Point (Firmware: SWBA1A0V100R006)

Discovery Timeline

• 2026-01-06 - CVE-2025-60262 published to NVD
• 2026-01-08 - Last updated in NVD database

Technical Details for CVE-2025-60262

Vulnerability Analysis

This vulnerability (CWE-276: Incorrect Default Permissions) stems from an insecure default configuration in the vsftpd service running on H3C wireless network devices. The vsftpd daemon is configured to allow anonymous file uploads, but critically, all uploaded files are automatically assigned root user ownership. This configuration error transforms a simple anonymous FTP upload capability into a severe privilege escalation vector.

The attack is network-accessible and requires no authentication or user interaction, making it trivially exploitable. An attacker can leverage this misconfiguration to upload malicious scripts or binaries that execute with root privileges, effectively granting complete control over the affected wireless controller or access point.

Root Cause

The root cause is an insecure default configuration in the vsftpd service where:

1. Anonymous FTP access is enabled by default
2. File ownership for uploaded files defaults to root rather than a restricted user
3. The FTP service runs with elevated privileges that persist to uploaded content

This violates the principle of least privilege and creates a direct path from unauthenticated network access to root-level device compromise.

Attack Vector

The attack is network-based and exploits the misconfigured vsftpd service. An attacker connects to the FTP service anonymously (without credentials) and uploads a malicious file. Due to the misconfiguration, the uploaded file is automatically owned by root. The attacker can then leverage this root-owned file through various techniques such as uploading a malicious cron job, configuration file, or executable script that the system processes with root privileges.

The vulnerability mechanism involves the following steps:

1. Attacker identifies an exposed H3C wireless device with FTP service accessible
2. Attacker connects anonymously to the FTP service
3. Attacker uploads a malicious file (e.g., shell script, configuration override)
4. The vsftpd misconfiguration assigns root ownership to the uploaded file
5. The attacker triggers execution of the uploaded file through available system mechanisms

See the H3C Misconfiguration Report for additional technical details.

Detection Methods for CVE-2025-60262

Indicators of Compromise

• Anonymous FTP connections to H3C wireless controllers or access points on port 21
• Unexpected files appearing in FTP upload directories with root ownership
• New or modified files in system directories such as /etc/cron.d/, /etc/init.d/, or /var/
• Unusual outbound network connections from wireless infrastructure devices

Detection Strategies

• Monitor network traffic for anonymous FTP (port 21) connections to wireless infrastructure
• Implement file integrity monitoring on critical device directories
• Deploy intrusion detection rules for FTP STOR commands targeting H3C devices
• Audit vsftpd configuration files for anonymous_enable=YES and improper chown_uploads settings

Monitoring Recommendations

• Enable logging for all FTP connections and file transfers on affected devices
• Configure SIEM alerts for anonymous FTP access patterns
• Implement network segmentation to restrict FTP access to management networks only
• Regularly audit device configurations for vsftpd security settings

How to Mitigate CVE-2025-60262

Immediate Actions Required

• Disable anonymous FTP access on all affected H3C M102G and BA1500L devices immediately
• If FTP access is required, configure vsftpd to use authenticated users with restricted permissions
• Implement network access controls to block FTP traffic (port 21) from untrusted networks
• Review uploaded files in FTP directories and remove any suspicious content
• Consider disabling the vsftpd service entirely if not operationally required

Patch Information

No official patch information is currently available from H3C. Organizations should monitor the H3C Security Advisory page for updates. Until a vendor patch is released, implement the configuration workarounds outlined below.

Workarounds

• Disable anonymous FTP by setting anonymous_enable=NO in the vsftpd configuration
• If anonymous access is required, ensure chown_uploads=NO to prevent root ownership assignment
• Implement firewall rules to restrict FTP access to trusted management IP addresses only
• Consider using SFTP or SCP as secure alternatives to FTP for file transfers

# Recommended vsftpd configuration hardening
# Edit /etc/vsftpd.conf on affected devices

# Disable anonymous FTP access
anonymous_enable=NO

# If anonymous must be enabled, prevent root ownership
chown_uploads=NO
chown_username=ftpuser

# Restrict local user access
local_enable=YES
write_enable=NO

# Enable logging for auditing
xferlog_enable=YES
log_ftp_protocol=YES