CVE-2024-7516
📋 TL;DR
This vulnerability allows man-in-the-middle attackers to forge SSH keys during remote operations, enabling them to hijack service sessions on Brocade Fabric OS switches. Attackers could potentially gain unauthorized access to switch administration functions. Organizations using Brocade Fabric OS switches before version 9.2.2 are affected.
💻 Affected Systems
- Brocade Fabric OS Switches
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of switch administration, allowing attackers to reconfigure fabric settings, disrupt storage networks, or establish persistent backdoors.
Likely Case
Unauthorized access to switch management functions, enabling configuration changes, network disruption, or data interception.
If Mitigated
Limited impact if SSH key validation controls and network segmentation are properly implemented.
🎯 Exploit Status
Requires man-in-the-middle position and knowledge of switch operations.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 9.2.2 or later
Vendor Advisory: https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/25177
Restart Required: Yes
Instructions:
1. Download Fabric OS 9.2.2 or later from Broadcom support portal. 2. Backup current configuration. 3. Apply firmware update following vendor documentation. 4. Reboot switch. 5. Verify successful update.
🔧 Temporary Workarounds
Restrict SSH Access
allLimit SSH connections to trusted management networks only
configure terminal
ssh permit user admin
ssh permit ip <trusted_ip>
Enable SSH Key Validation
allConfigure strict SSH key validation policies
sshKeyGen -A
ssh-copy-id -i ~/.ssh/id_rsa.pub admin@switch
🧯 If You Can't Patch
- Implement strict network segmentation to isolate management traffic
- Monitor for unauthorized SSH connections and key changes
🔍 How to Verify
Check if Vulnerable:
Check Fabric OS version with 'version' command and compare to 9.2.2Check Version:
versionVerify Fix Applied:
Verify version is 9.2.2 or later and check SSH configuration📡 Detection & Monitoring
Log Indicators:
- Unexpected SSH key changes
- Failed SSH authentication attempts from unknown sources
- Unusual switch configuration changes
Network Indicators:
- SSH traffic from unexpected sources
- Man-in-the-middle patterns in management network
SIEM Query:
source="brocade_switch" AND (event="ssh_key_change" OR event="auth_failed")