CVE-2022-27290
📋 TL;DR
CVE-2022-27290 is a stack overflow vulnerability in D-Link DIR-619 Ax routers that allows attackers to cause a Denial of Service (DoS) by sending specially crafted requests to the curTime parameter. This affects D-Link DIR-619 Ax v1.00 routers, potentially disrupting network connectivity for users.
💻 Affected Systems
- D-Link DIR-619 Ax
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete router crash requiring physical reboot, persistent network downtime, and potential remote code execution if combined with other vulnerabilities.
Likely Case
Router becomes unresponsive, requiring reboot to restore functionality, causing temporary network disruption.
If Mitigated
Minimal impact with proper network segmentation and access controls preventing exploitation attempts.
🎯 Exploit Status
Exploit details are publicly available in GitHub repositories, making this easy to weaponize.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check D-Link security bulletin for latest firmware
Vendor Advisory: https://www.dlink.com/en/security-bulletin/
Restart Required: Yes
Instructions:
1. Visit D-Link support site. 2. Download latest firmware for DIR-619 Ax. 3. Log into router admin interface. 4. Navigate to firmware update section. 5. Upload and apply new firmware. 6. Reboot router.
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to router web interface
Network Segmentation
allIsolate router management interface from untrusted networks
🧯 If You Can't Patch
- Replace affected router with supported model
- Implement strict firewall rules blocking access to router management interface from untrusted networks
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface matches v1.00Check Version:
Log into router web interface and check System Status or Firmware sectionVerify Fix Applied:
Verify firmware version has been updated to latest version from D-Link📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts
- Unusual POST requests to formSetWanDhcpplus endpoint
- Router reboot logs
Network Indicators:
- Unusual traffic to router management port (typically 80/443)
- Malformed HTTP requests with long curTime parameters
SIEM Query:
source="router_logs" AND (uri="*formSetWanDhcpplus*" OR event="reboot")