CVE-2024-7517
📋 TL;DR
A command injection vulnerability in Brocade Fabric OS allows local authenticated attackers to escalate privileges via crafted portcfg commands. This affects IP extension platforms including Brocade 7810, 7840, 7850 switches and X6/X7 directors with SX-6 blades. Attackers must have SSH or serial console access to exploit this vulnerability.
💻 Affected Systems
- Brocade 7810
- Brocade 7840
- Brocade 7850
- Brocade X6 Director
- Brocade X7 Director
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with administrative control over the switch, enabling data interception, configuration changes, and persistence.
Likely Case
Privilege escalation from authenticated user to root/admin, allowing unauthorized configuration changes and potential data access.
If Mitigated
Limited impact if proper access controls and network segmentation prevent unauthorized local access.
🎯 Exploit Status
Exploitation requires authenticated access and knowledge of portcfg command manipulation; no public exploit code identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Fabric OS 9.2.0c or later, 9.2.1b or later
Vendor Advisory: https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/25071
Restart Required: Yes
Instructions:
1. Download appropriate Fabric OS update from Broadcom support portal. 2. Backup current configuration. 3. Apply firmware update following vendor documentation. 4. Reboot switch to complete installation. 5. Verify version after reboot.
🔧 Temporary Workarounds
Restrict Local Access
allLimit SSH and serial console access to trusted administrative users only.
Configure access control lists (ACLs) for SSH
Use strong authentication methods
Disable unused serial console ports
Network Segmentation
allIsolate management interfaces from general user networks.
Configure VLANs to separate management traffic
Implement firewall rules restricting access to management IPs
🧯 If You Can't Patch
- Implement strict access controls allowing only authorized administrators to access switch management interfaces.
- Monitor and audit all portcfg command usage for suspicious patterns or unauthorized privilege escalation attempts.
🔍 How to Verify
Check if Vulnerable:
Check Fabric OS version: 'version' command; if version is before 9.2.0c or between 9.2.1-9.2.1a on affected platforms, system is vulnerable.Check Version:
versionVerify Fix Applied:
After patching, run 'version' command to confirm version is 9.2.0c or later, or 9.2.1b or later.📡 Detection & Monitoring
Log Indicators:
- Unusual portcfg command usage patterns
- Multiple failed privilege escalation attempts
- Unexpected user privilege changes
Network Indicators:
- Unusual management traffic patterns
- Unauthorized configuration changes
SIEM Query:
Search for 'portcfg' command usage from non-admin users or unusual time patterns in switch logs.