CVE-2024-29966: Brocade SANnav Auth Bypass Vulnerability

CVE-2024-29966 Overview

CVE-2024-29966 is a critical hardcoded credentials vulnerability affecting Brocade SANnav OVA versions before v2.3.1 and v2.3.0a. The vulnerability exists due to hard-coded credentials present in the product documentation that correspond to the appliance's root password. This security flaw enables unauthenticated attackers to gain full administrative access to the Brocade SANnav appliance over the network.

Critical Impact

An unauthenticated attacker can leverage publicly documented credentials to obtain root-level access to the SANnav appliance, potentially compromising the entire Storage Area Network (SAN) infrastructure managed by the device.

Affected Products

• Broadcom Brocade SANnav OVA versions prior to v2.3.1
• Broadcom Brocade SANnav OVA versions prior to v2.3.0a

Discovery Timeline

• 2024-04-19 - CVE-2024-29966 published to NVD
• 2025-02-04 - Last updated in NVD database

Technical Details for CVE-2024-29966

Vulnerability Analysis

This vulnerability falls under CWE-798 (Use of Hard-coded Credentials), a configuration and design flaw that represents a fundamental security weakness. The hard-coded credentials embedded within the Brocade SANnav documentation directly correspond to the default root password configured on the appliance.

The critical nature of this vulnerability stems from the fact that these credentials provide root-level access to the appliance. Brocade SANnav is a SAN management application used to monitor, configure, and manage Fibre Channel (FC) switches and SANs in enterprise environments. Compromise of this appliance could grant attackers visibility into and control over critical storage infrastructure.

The network-exploitable nature of this vulnerability means that any attacker with network access to the SANnav management interface can attempt authentication using the documented credentials without requiring any prior privileges or user interaction.

Root Cause

The root cause is the inclusion of valid root credentials within product documentation combined with a failure to enforce credential changes during initial appliance setup. This creates a scenario where deployed appliances may retain the documented default credentials, making them vulnerable to unauthorized access.

Attack Vector

The attack vector is network-based, requiring no authentication, user interaction, or special conditions. An attacker who can reach the SANnav management interface can simply authenticate using the credentials found in the publicly available documentation. This provides immediate root-level access to the appliance.

The exploitation process involves:

1. Obtaining access to Brocade SANnav documentation containing the hard-coded credentials
2. Identifying target SANnav appliances on the network
3. Authenticating to the appliance using the documented root credentials
4. Gaining full administrative control over the SAN management infrastructure

Detection Methods for CVE-2024-29966

Indicators of Compromise

• Unauthorized root login sessions on SANnav appliances
• Login attempts using default credentials from external or unauthorized IP addresses
• Unexpected configuration changes to SAN infrastructure
• New user accounts or SSH keys added to the appliance

Detection Strategies

• Monitor authentication logs for successful root logins from unexpected source IPs
• Implement network monitoring for connections to SANnav management ports from untrusted networks
• Deploy SIEM rules to detect authentication patterns consistent with default credential usage
• Conduct regular audits of user accounts and SSH keys on SANnav appliances

Monitoring Recommendations

• Enable detailed logging on SANnav appliances and forward logs to a central SIEM
• Implement network segmentation monitoring to detect unauthorized access attempts to management interfaces
• Set up alerts for any root-level authentication events outside of maintenance windows
• Monitor for changes to critical configuration files and user account databases

How to Mitigate CVE-2024-29966

Immediate Actions Required

• Immediately change the root password on all deployed Brocade SANnav appliances
• Restrict network access to SANnav management interfaces using firewall rules
• Audit authentication logs for evidence of unauthorized access using default credentials
• Review and remove any unauthorized user accounts or SSH keys

Patch Information

Broadcom has addressed this vulnerability in Brocade SANnav versions v2.3.1 and v2.3.0a. Organizations should upgrade to these versions or later. For detailed patch information and download links, refer to the Broadcom Security Advisory.

Workarounds

• Change the default root password immediately after appliance deployment
• Implement network segmentation to restrict access to the SANnav management interface to authorized management networks only
• Deploy multi-factor authentication for administrative access where supported
• Disable direct root login and require sudo escalation from named user accounts

# Change root password on SANnav appliance
passwd root

# Restrict SSH access to specific management networks (example iptables rule)
iptables -A INPUT -p tcp --dport 22 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 22 -j DROP