CVE-2023-30375
📋 TL;DR
This CVE describes a stack-based buffer overflow vulnerability in the 'getIfIp' function of Tenda AC15 routers running firmware version V15.03.05.19. Attackers can exploit this to execute arbitrary code with root privileges, potentially taking full control of affected routers. All users of Tenda AC15 routers with the vulnerable firmware are affected.
💻 Affected Systems
- Tenda AC15 router
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with root privileges leading to complete router compromise, network traffic interception, credential theft, and lateral movement into connected networks.
Likely Case
Router takeover allowing attackers to modify DNS settings, intercept traffic, deploy malware to connected devices, or create persistent backdoors.
If Mitigated
Limited impact if routers are behind firewalls with strict inbound filtering and network segmentation prevents lateral movement.
🎯 Exploit Status
Public proof-of-concept code exists in GitHub repositories, making exploitation straightforward for attackers with basic skills.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: No official vendor advisory found
Restart Required: Yes
Instructions:
1. Check Tenda's official website for firmware updates. 2. If an update is available, download the firmware file. 3. Log into router admin interface. 4. Navigate to firmware upgrade section. 5. Upload and install the new firmware. 6. Reboot the router.
🔧 Temporary Workarounds
Disable remote administration
allPrevents external attackers from accessing the vulnerable interface
Login to router admin panel -> Advanced Settings -> Remote Management -> Disable
Network segmentation
allIsolate router management interface from untrusted networks
🧯 If You Can't Patch
- Replace affected routers with different models or brands
- Place routers behind dedicated firewalls with strict inbound filtering rules
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface under System Status or Firmware Upgrade sectionCheck Version:
Login to router web interface and check firmware version in system settingsVerify Fix Applied:
Verify firmware version has changed from V15.03.05.19 to a newer version📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP requests to router management interface
- Multiple failed login attempts followed by buffer overflow patterns
Network Indicators:
- Unusual traffic patterns to router management ports (typically 80/443)
- Exploit payloads in HTTP requests
SIEM Query:
source="router_logs" AND (http_uri="*getIfIp*" OR message="*buffer overflow*" OR message="*segmentation fault*")