CVE-2022-27292
📋 TL;DR
CVE-2022-27292 is a stack overflow vulnerability in D-Link DIR-619 Ax routers that allows attackers to cause Denial of Service (DoS) by sending specially crafted requests to the formLanguageChange function. This affects users of D-Link DIR-619 Ax routers running vulnerable firmware versions, potentially rendering the device unresponsive.
💻 Affected Systems
- D-Link DIR-619 Ax
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device crash requiring physical reboot, potentially leading to extended network downtime and service disruption.
Likely Case
Router becomes unresponsive, requiring manual reboot to restore functionality, causing temporary network outage.
If Mitigated
Minimal impact with proper network segmentation and access controls limiting exposure to the vulnerable interface.
🎯 Exploit Status
The vulnerability is in the web interface and requires no authentication, making exploitation straightforward for attackers with network access to the device.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check D-Link website for latest firmware
Vendor Advisory: https://www.dlink.com/en/security-bulletin/
Restart Required: Yes
Instructions:
1. Visit D-Link support website 2. Download latest firmware for DIR-619 Ax 3. Log into router web interface 4. Navigate to firmware update section 5. Upload and apply new firmware 6. Wait for router to reboot
🔧 Temporary Workarounds
Disable Remote Management
allDisable remote access to the router's web management interface to prevent internet-based attacks.
Network Segmentation
allPlace the router in a separate network segment with restricted access to its management interface.
🧯 If You Can't Patch
- Replace the vulnerable router with a supported model that receives security updates
- Implement strict firewall rules to block all external access to the router's management interface (ports 80/443)
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in web interface under System > Firmware or similar menu. If version is v1.00, device is vulnerable.Check Version:
No CLI command available - check via web interface at http://router-ip/ or via router's admin panelVerify Fix Applied:
After firmware update, verify version number has changed from v1.00 to a newer version in the firmware information page.📡 Detection & Monitoring
Log Indicators:
- Multiple failed requests to formLanguageChange endpoint
- Router reboot events without user action
- Unusual traffic patterns to router management interface
Network Indicators:
- HTTP POST requests to /formLanguageChange with malformed nextPage parameter
- Sudden drop in router responsiveness followed by reboot
SIEM Query:
source="router_logs" AND (uri="/formLanguageChange" OR message="reboot" OR message="crash")