CVE-2018-18907
📋 TL;DR
This vulnerability allows attackers to bypass WPA2 encryption on D-Link DIR-850L routers by exploiting an incomplete WPA handshake. Attackers can send unencrypted data frames to gain unauthorized wireless network access. Only D-Link DIR-850L routers with firmware version 1.21WW are affected.
💻 Affected Systems
- D-Link DIR-850L
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete network compromise allowing attackers to intercept all wireless traffic, access internal resources, and launch further attacks from within the network.
Likely Case
Unauthorized network access leading to data interception, bandwidth theft, and potential lateral movement to connected devices.
If Mitigated
Limited impact if strong network segmentation, monitoring, and additional authentication layers are in place.
🎯 Exploit Status
Exploitation requires proximity to wireless network but no authentication; tools exist to exploit WPA handshake vulnerabilities.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Firmware version after 1.21WW (check vendor advisory for specific version)
Vendor Advisory: https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10097
Restart Required: Yes
Instructions:
1. Visit D-Link support site. 2. Download latest firmware for DIR-850L. 3. Log into router admin interface. 4. Navigate to firmware update section. 5. Upload and install new firmware. 6. Reboot router.
🔧 Temporary Workarounds
Disable Wireless
allTemporarily disable wireless functionality and use wired connections only
Change Wireless Security
allSwitch to WPA3 or use MAC address filtering as temporary mitigation
🧯 If You Can't Patch
- Replace affected router with different model that doesn't have this vulnerability
- Implement network segmentation to isolate wireless traffic and use VPN for all wireless connections
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface; if version is 1.21WW, device is vulnerableCheck Version:
Log into router admin interface and check System Status or Firmware Information pageVerify Fix Applied:
Verify firmware version is updated to version specified in vendor advisory and test wireless security with WPA2 testing tools📡 Detection & Monitoring
Log Indicators:
- Multiple failed WPA handshakes from same MAC
- Unusual wireless association patterns
- Traffic from unauthorized MAC addresses
Network Indicators:
- Unencrypted data frames on WPA2 network
- Suspicious wireless traffic patterns
- ARP spoofing detection
SIEM Query:
source="wireless-controller" AND (event_type="auth_failure" OR event_type="rogue_ap")🔗 References
- http://us.dlink.com/security-advisories/
- https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10097
- https://www.synopsys.com/blogs/software-security/wpa2-encryption-bypass-defensics-fuzzing/
- http://us.dlink.com/security-advisories/
- https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10097
- https://www.synopsys.com/blogs/software-security/wpa2-encryption-bypass-defensics-fuzzing/
