CVE-2025-7398
📋 TL;DR
Brocade ASCG versions before 3.3.0 use medium-strength cryptography algorithms on internal ports 9000 and 8036, allowing attackers to potentially decrypt or manipulate sensitive communications. This affects organizations using vulnerable Brocade ASCG appliances for network management.
💻 Affected Systems
- Brocade Application Services Controller Gateway (ASCG)
📦 What is this software?
Ascg by Brocade
⚠️ Risk & Real-World Impact
Worst Case
Attackers intercept and decrypt sensitive management traffic, gaining administrative access to network infrastructure and potentially compromising entire environments.
Likely Case
Eavesdropping on internal communications leading to credential theft, configuration exposure, and lateral movement within the network.
If Mitigated
Limited impact if traffic is isolated via network segmentation and strong access controls prevent unauthorized access to these ports.
🎯 Exploit Status
Requires network access to internal ports and ability to intercept/decrypt traffic using cryptographic weaknesses.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.3.0 or later
Vendor Advisory: https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/35950
Restart Required: Yes
Instructions:
1. Download Brocade ASCG version 3.3.0 or later from Broadcom support portal. 2. Backup current configuration. 3. Apply the update via the ASCG management interface. 4. Reboot the appliance as required. 5. Verify the update completed successfully.
🔧 Temporary Workarounds
Network Segmentation
allRestrict access to ports 9000 and 8036 using firewall rules to only allow connections from trusted management systems.
Encryption Upgrade
allConfigure ASCG to use only strong cryptography algorithms (AES-256, SHA-256) if supported in current version.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate ASCG management traffic from untrusted networks
- Monitor network traffic on ports 9000 and 8036 for unusual patterns or unauthorized access attempts
🔍 How to Verify
Check if Vulnerable:
Check ASCG version via web interface or CLI. Versions below 3.3.0 are vulnerable.Check Version:
ssh admin@ascg-ip 'show version' or check via web interface System > AboutVerify Fix Applied:
Verify ASCG version is 3.3.0 or higher and check that strong cryptography is enforced on ports 9000 and 8036.📡 Detection & Monitoring
Log Indicators:
- Unusual connection attempts to ports 9000/8036
- Failed authentication attempts on management interfaces
- Configuration changes to cryptographic settings
Network Indicators:
- Unusual traffic patterns to/from ASCG ports 9000/8036
- SSL/TLS handshake failures indicating weak cipher negotiation
- Traffic analysis showing potential man-in-the-middle attacks
SIEM Query:
source="ascg_logs" AND (port=9000 OR port=8036) AND (event_type="connection" OR event_type="authentication")