CVE-2024-1509
📋 TL;DR
Brocade ASCG web interface versions before 3.2.0 lack HTTP Strict Transport Security (HSTS) enforcement, allowing attackers to downgrade HTTPS connections to HTTP. This enables man-in-the-middle attacks, SSL stripping, and cookie hijacking. Organizations using Brocade ASCG web interfaces are affected.
💻 Affected Systems
- Brocade Application Services Controller Gateway (ASCG)
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers intercept and manipulate all web traffic, steal session cookies and credentials, inject malicious content, and maintain persistent access to the management interface.
Likely Case
Man-in-the-middle attackers downgrade HTTPS to HTTP, intercept authentication credentials and session cookies, and potentially gain administrative access to the ASCG.
If Mitigated
With proper network segmentation and access controls, risk is limited to internal attackers on the same network segment.
🎯 Exploit Status
Exploitation requires man-in-the-middle position but uses well-known SSL stripping techniques. No authentication required to initiate attacks.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.2.0
Vendor Advisory: https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/25428
Restart Required: Yes
Instructions:
1. Download Brocade ASCG version 3.2.0 from Broadcom support portal. 2. Backup current configuration. 3. Apply the update through the web interface or CLI. 4. Reboot the appliance as required.
🔧 Temporary Workarounds
Network Segmentation and Access Control
allRestrict access to ASCG web interface to trusted networks only using firewall rules.
Reverse Proxy with HSTS
linuxPlace a reverse proxy (nginx, Apache) in front of ASCG that enforces HSTS headers.
nginx config: add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
Apache config: Header always set Strict-Transport-Security "max-age=31536000; includeSubDomains"
🧯 If You Can't Patch
- Isolate ASCG management interface on separate VLAN with strict access controls.
- Monitor for SSL stripping attempts and unusual HTTP traffic to the ASCG interface.
🔍 How to Verify
Check if Vulnerable:
Check web interface response headers for missing 'Strict-Transport-Security' header using: curl -I https://ascg-address/Check Version:
Login to ASCG web interface and check System > About, or use CLI: show versionVerify Fix Applied:
Verify version is 3.2.0+ and response includes HSTS header: curl -I https://ascg-address/ | grep -i strict-transport-security📡 Detection & Monitoring
Log Indicators:
- Multiple HTTP requests to ASCG interface instead of HTTPS
- Failed HTTPS connections followed by HTTP connections
Network Indicators:
- SSL stripping tools detected on network (sslstrip, mitmproxy)
- HTTP traffic to ASCG management port (should be HTTPS only)
SIEM Query:
source="ascg_logs" AND (protocol="HTTP" OR status_code=301) AND uri CONTAINS "/login" OR "/admin"