CVE-2024-2859: Brocade SANnav Authentication Bypass Flaw

CVE-2024-2859 Overview

CVE-2024-2859 affects Broadcom Brocade SANnav, a storage area network management application. The OVA (Open Virtual Appliance) distribution ships with root user login enabled by default. While the root account is password-protected, this default configuration exposes the appliance to remote attackers who obtain the root credentials. An attacker with root access can fully compromise the SANnav management server and any storage fabric it controls. The vulnerability maps to CWE-276: Incorrect Default Permissions.

Critical Impact

Remote attackers with root credentials gain complete confidentiality, integrity, and availability compromise of the SANnav appliance and connected SAN infrastructure.

Affected Products

• Broadcom Brocade SANnav (OVA distributions)
• SANnav Management Portal deployments using default installation settings
• Related NetApp integrations referenced in NetApp Security Advisory NTAP-20240628-0003

Discovery Timeline

• 2024-04-27 - CVE-2024-2859 published to NVD
• 2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-2859

Vulnerability Analysis

Broadcom Brocade SANnav is deployed as an OVA image intended for virtualization platforms such as VMware ESXi. The default OVA image ships with the root account enabled for interactive login. Administrators receive a functioning appliance but inherit an unnecessarily broad attack surface. The root account bypasses role-based access controls that SANnav enforces at the application layer.

An attacker who obtains or guesses the root password gains full operating system control. From that position, the attacker can read management credentials, alter SAN zoning, disrupt fabric operations, and pivot deeper into the storage infrastructure. Because SANnav manages fabric switches and storage arrays, downstream impact extends beyond the appliance itself.

Root Cause

The root cause is an insecure default configuration [CWE-276]. Interactive root login should be disabled on shipped appliances, with administrative access mediated through a lower-privilege account and sudo. The SANnav OVA does not enforce this hardening baseline out of the box.

Attack Vector

Exploitation requires network access to the SANnav appliance and valid root credentials. High privileges are required, so this is not an unauthenticated remote code execution flaw. Realistic attack paths include credential reuse, weak password selection, credential theft from adjacent systems, and insider misuse. Once authenticated, the attacker inherits unrestricted control of the appliance operating system.

No public proof-of-concept exploit has been published, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.

Detection Methods for CVE-2024-2859

Indicators of Compromise

• Interactive SSH sessions authenticated as root on the SANnav appliance
• Configuration or file changes under /etc, /root, or SANnav application directories outside scheduled maintenance windows
• New cron jobs, systemd units, or SSH authorized keys added to the root account
• Outbound connections from the SANnav appliance to unfamiliar external hosts

Detection Strategies

• Audit /var/log/secure and /var/log/auth.log on the SANnav appliance for root logins and failed authentication attempts
• Compare running configuration and installed packages against a known-good baseline of the SANnav OVA
• Alert on any SSH session where the effective user is root rather than an escalated administrative account

Monitoring Recommendations

• Forward SANnav appliance syslog to a centralized logging platform and retain authentication events
• Monitor SAN fabric zoning changes and correlate them with SANnav administrative sessions
• Track privileged account usage against ticketed change windows to identify unauthorized activity

How to Mitigate CVE-2024-2859

Immediate Actions Required

• Review Broadcom Security Advisory #23245 and apply the vendor guidance for the installed SANnav version
• Rotate the root password on every SANnav OVA deployment and store the new credential in a privileged access management system
• Restrict network access to the SANnav management interfaces using firewall rules or management VLANs
• Enumerate all SANnav instances in the environment and confirm each one has been hardened

Patch Information

Broadcom addresses the default root login exposure through configuration hardening guidance in Broadcom Security Advisory #23245. NetApp customers should also review NetApp Security Advisory NTAP-20240628-0003 for platform-specific remediation steps. Apply the vendor-recommended SANnav release and follow the hardening procedure to disable interactive root login.

Workarounds

• Disable interactive root SSH login by setting PermitRootLogin no in /etc/ssh/sshd_config and restarting the SSH service
• Create a dedicated administrative account with sudo privileges and require its use for all appliance management
• Enforce multi-factor authentication on the jump host or bastion used to reach SANnav
• Place the SANnav appliance on an isolated management network reachable only from authorized administrator workstations

# Configuration example: disable root SSH login on the SANnav appliance
sudo sed -i 's/^#\?PermitRootLogin.*/PermitRootLogin no/' /etc/ssh/sshd_config
sudo sshd -t && sudo systemctl restart sshd

# Verify root cannot authenticate over SSH
ssh -o PubkeyAuthentication=no root@sannav.example.local