CVE-2024-4161 Overview
CVE-2024-4161 is an information disclosure vulnerability in Broadcom Brocade SANnav storage area network management software. Versions prior to Brocade SANnav v2.3.0 transmit syslog traffic in cleartext over the network. An unauthenticated, remote attacker with the ability to observe network traffic can capture sensitive information contained within syslog messages. The weakness is classified as [CWE-319] Cleartext Transmission of Sensitive Information. Syslog data from storage management platforms frequently includes hostnames, IP addresses, user activity, configuration changes, and operational diagnostics useful for reconnaissance.
Critical Impact
Network-positioned attackers can passively intercept syslog data from Brocade SANnav deployments, exposing operational intelligence about the storage fabric without authentication.
Affected Products
- Broadcom Brocade SANnav versions prior to v2.3.0
- Brocade SAN management appliances running affected SANnav releases
- Storage fabrics monitored by impacted SANnav instances
Discovery Timeline
- 2024-04-25 - CVE-2024-4161 published to NVD
- 2025-02-06 - Last updated in NVD database
Technical Details for CVE-2024-4161
Vulnerability Analysis
Brocade SANnav is a centralized management application for Brocade storage area network (SAN) fabrics. Prior to version 2.3.0, the product transmits syslog traffic without applying transport-layer encryption. Syslog payloads traverse the network in plaintext between SANnav and configured endpoints. Any party with visibility into the transmission path can read message contents using standard packet capture tooling.
The weakness falls under [CWE-319], which covers transmission of sensitive information in cleartext. The vulnerability is exploitable across the network without authentication or user interaction, and impacts confidentiality without affecting integrity or availability.
Root Cause
The root cause is the absence of encrypted syslog transport in SANnav releases before 2.3.0. The application relies on plaintext syslog rather than enforcing TLS-protected syslog as defined in RFC 5425. Sensitive diagnostic and audit data therefore depends on network-layer trust assumptions that often do not hold in enterprise or multi-tenant environments.
Attack Vector
An attacker with the ability to sniff traffic between SANnav and its syslog peers can capture transmitted messages. Common positions include compromised network segments, mirrored switch ports, ARP spoofing on the management VLAN, or upstream routing infrastructure. Captured logs may reveal SAN topology details, authentication events, configuration operations, and operator identifiers usable for follow-on attacks against the storage fabric.
No exploitation code is required beyond passive packet capture utilities. Refer to the Broadcom Security Advisory for vendor-specified technical details.
Detection Methods for CVE-2024-4161
Indicators of Compromise
- Unencrypted syslog traffic on UDP/514 or TCP/514 originating from SANnav management hosts
- Unexpected network captures, port mirroring sessions, or SPAN configurations on segments carrying SANnav traffic
- ARP table anomalies or unauthorized devices on the management VLAN serving SANnav
Detection Strategies
- Inventory all SANnav installations and identify the version in use to confirm exposure to versions prior to 2.3.0
- Inspect network flow records for cleartext syslog (port 514) sourced from or destined to SANnav servers
- Audit switch configurations for unauthorized monitoring sessions on VLANs carrying storage management traffic
Monitoring Recommendations
- Alert on new or modified port mirroring, SPAN, or TAP configurations on management network infrastructure
- Monitor for rogue devices appearing on the SANnav management subnet using DHCP and ARP telemetry
- Track SANnav configuration changes, including syslog destination updates, through change management logs
How to Mitigate CVE-2024-4161
Immediate Actions Required
- Upgrade Brocade SANnav to version 2.3.0 or later, where encrypted syslog transport is supported
- Restrict SANnav management traffic to a dedicated, access-controlled VLAN until the upgrade is complete
- Review historical packet captures and syslog archives accessible to non-administrative personnel for exposure
Patch Information
Broadcom addresses CVE-2024-4161 in Brocade SANnav v2.3.0. Refer to the Broadcom Security Advisory for upgrade instructions and supported migration paths. Apply the patch in accordance with your storage maintenance windows and validate syslog functionality after the upgrade.
Workarounds
- Tunnel syslog traffic through an IPsec or TLS-protected transport between SANnav and syslog collectors
- Isolate the SANnav management network behind firewalls that block exposure to user and guest segments
- Disable non-essential syslog destinations and reduce the verbosity of transmitted messages until the upgrade is applied
# Example: restrict syslog traffic to the management subnet at the firewall
iptables -A FORWARD -p udp --dport 514 -s 10.10.20.0/24 -d 10.10.20.50 -j ACCEPT
iptables -A FORWARD -p udp --dport 514 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
