CVE-2022-47617
📋 TL;DR
The Hitron CODA-5310 router contains hard-coded encryption keys in its firmware, allowing authenticated administrators to decrypt system files. This enables unauthorized file access, modification, and potential service disruption. All users of affected Hitron CODA-5310 routers are vulnerable.
💻 Affected Systems
- Hitron CODA-5310
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
An attacker with admin credentials could decrypt critical system files, modify router configuration, install persistent backdoors, disrupt network services, or gain complete control of the device.
Likely Case
An attacker with compromised admin credentials decrypts configuration files to extract sensitive network information, modify settings, or cause temporary service interruptions.
If Mitigated
With strong admin password policies and network segmentation, impact is limited to potential configuration viewing but not modification if file write permissions are restricted.
🎯 Exploit Status
Exploitation requires admin credentials but uses hard-coded keys that are trivial to extract from firmware.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check with Hitron for latest firmware
Vendor Advisory: https://www.twcert.org.tw/tw/cp-132-7083-94e13-1.html
Restart Required: Yes
Instructions:
1. Contact Hitron support for latest firmware. 2. Download firmware update. 3. Log into router admin interface. 4. Navigate to firmware update section. 5. Upload and apply new firmware. 6. Reboot router.
🔧 Temporary Workarounds
Change Admin Credentials
allUse strong, unique admin passwords to prevent credential compromise
Disable Remote Admin Access
allPrevent external access to admin interface
🧯 If You Can't Patch
- Isolate router on separate VLAN with strict firewall rules
- Implement network monitoring for unusual admin access patterns
🔍 How to Verify
Check if Vulnerable:
Check router firmware version against Hitron's patched version listCheck Version:
Log into router admin interface and check firmware version in system statusVerify Fix Applied:
Verify firmware version has been updated to patched version📡 Detection & Monitoring
Log Indicators:
- Multiple failed admin login attempts
- Unusual admin access from unexpected IPs
- Configuration file modification timestamps
Network Indicators:
- Unusual traffic to/from router admin interface
- Unexpected configuration changes
SIEM Query:
source="router_logs" (event="admin_login" AND result="success") | stats count by src_ip