CVE-2022-28895
📋 TL;DR
This CVE describes a command injection vulnerability in D-Link DIR882 routers that allows attackers to execute arbitrary commands with root privileges. Attackers can exploit this by sending a crafted payload to the /setnetworksettings/IPAddress component. This affects users of D-Link DIR882 routers running vulnerable firmware versions.
💻 Affected Systems
- D-Link DIR882
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the router with root access, allowing attackers to intercept network traffic, install persistent malware, pivot to internal networks, and brick the device.
Likely Case
Attackers gain root access to the router, enabling them to modify DNS settings, intercept credentials, and use the device as a foothold for further attacks on the internal network.
If Mitigated
With proper network segmentation and access controls, the impact is limited to the router itself, though it could still serve as a pivot point if other vulnerabilities exist.
🎯 Exploit Status
Exploitation requires authentication to the web interface, but default credentials or credential reuse could facilitate attacks.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check D-Link security bulletin for latest patched 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 DIR882. 3. Log into router web 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 the web management interface
Change Default Credentials
allUse strong, unique passwords for router administration
🧯 If You Can't Patch
- Segment router on isolated network segment
- Implement strict firewall rules to limit access to router management interface
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router web interface under System > FirmwareCheck Version:
Login to router web interface and navigate to System > Firmware sectionVerify Fix Applied:
Verify firmware version matches or exceeds patched version from D-Link advisory📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /setnetworksettings/IPAddress
- Multiple failed login attempts followed by successful login
Network Indicators:
- Unusual outbound connections from router
- DNS changes not initiated by administrator
SIEM Query:
source="router_logs" AND (uri="/setnetworksettings/IPAddress" OR cmd="*;*" OR cmd="*|*")