CVE-2023-50239
📋 TL;DR
Two stack-based buffer overflow vulnerabilities in Realtek rtl819x Jungle SDK's boa set_RadvdInterfaceParam functionality allow remote code execution via specially crafted network requests. Attackers can exploit these vulnerabilities to execute arbitrary code on affected devices, primarily impacting systems using Realtek rtl819x-based networking equipment with the vulnerable SDK.
💻 Affected Systems
- Realtek rtl819x Jungle SDK
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote attacker gains full control of the device, enabling persistent access, lateral movement, and use as a botnet node.
Likely Case
Remote code execution leading to device compromise, data theft, and potential network infiltration.
If Mitigated
Limited impact with proper network segmentation and access controls preventing exploitation attempts.
🎯 Exploit Status
Exploitation requires crafting specific network requests but no authentication is needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Monitor Realtek for security updates. 2. Check with device manufacturers for firmware updates. 3. Apply patches when available.
🔧 Temporary Workarounds
Disable Radvd Interface Configuration
linuxDisable the vulnerable boa set_RadvdInterfaceParam functionality if not required.
# Configuration depends on specific device implementation
Network Segmentation
allIsolate affected devices from untrusted networks.
# Use firewall rules to restrict access to affected devices
🧯 If You Can't Patch
- Implement strict network access controls to limit exposure
- Monitor for suspicious network traffic to affected devices
🔍 How to Verify
Check if Vulnerable:
Check if device uses Realtek rtl819x Jungle SDK v3.4.11 and has boa web server with Radvd functionality.Check Version:
# Device-specific command varies by manufacturerVerify Fix Applied:
Verify SDK version has been updated beyond v3.4.11 or functionality has been disabled.📡 Detection & Monitoring
Log Indicators:
- Multiple requests to set_RadvdInterfaceParam with long interface names
- Boa web server crashes or abnormal behavior
Network Indicators:
- Unusual network requests to boa web server on port 80/443 with long parameter values
SIEM Query:
source_ip:* AND dest_port:(80 OR 443) AND http_uri:"*set_RadvdInterfaceParam*" AND http_param_length>100