CVE-2022-43934
📋 TL;DR
Brocade SANnav management software versions before 2.2.2 support weak key exchange algorithms on multiple ports, allowing attackers to potentially decrypt or manipulate encrypted communications. This affects organizations using Brocade SANnav for storage area network management.
💻 Affected Systems
- Brocade SANnav
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could perform man-in-the-middle attacks, decrypt sensitive SAN management traffic, or impersonate legitimate management systems to gain unauthorized access to storage infrastructure.
Likely Case
Network eavesdropping leading to exposure of management credentials, configuration data, or sensitive SAN metadata that could facilitate further attacks.
If Mitigated
Limited exposure if strong network segmentation and access controls prevent external access to affected ports.
🎯 Exploit Status
Exploitation requires network access to affected ports and ability to intercept/modify traffic. No authentication bypass, but weak cryptography enables easier decryption.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Brocade SANnav 2.2.2
Vendor Advisory: https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/21220
Restart Required: Yes
Instructions:
1. Download Brocade SANnav 2.2.2 from Broadcom support portal. 2. Backup current configuration. 3. Apply the update following vendor documentation. 4. Restart SANnav services.
🔧 Temporary Workarounds
Network Access Restriction
allRestrict network access to affected ports (24, 6514, 18023, 19094, 19095) using firewalls or network segmentation
Disable Weak Algorithms via Configuration
allConfigure SANnav to disable support for weak key exchange algorithms if supported in current version
🧯 If You Can't Patch
- Implement strict network segmentation to isolate SANnav management traffic from untrusted networks
- Monitor affected ports for unusual connection attempts or traffic patterns
🔍 How to Verify
Check if Vulnerable:
Check SANnav version via web interface or CLI. If version is below 2.2.2, system is vulnerable. Test ports with SSL/TLS scanners to detect weak key exchange support.Check Version:
Check via SANnav web interface under System > About, or use SANnav CLI if availableVerify Fix Applied:
After patching to 2.2.2, verify version and test affected ports with tools like nmap or sslscan to confirm weak algorithms are no longer supported.📡 Detection & Monitoring
Log Indicators:
- Unusual connection attempts to ports 24, 6514, 18023, 19094, 19095
- SSL/TLS handshake failures or downgrade attempts
Network Indicators:
- SSL/TLS traffic to affected ports using weak cipher suites
- Multiple connection attempts from single sources to management ports
SIEM Query:
source_port IN (24, 6514, 18023, 19094, 19095) AND (event_type="connection_attempt" OR protocol="ssl/tls")