CVE-2022-26085
📋 TL;DR
CVE-2022-26085 is an OS command injection vulnerability in InHand Networks InRouter302's httpd wlscan_ASP functionality that allows authenticated attackers to execute arbitrary commands via specially-crafted HTTP requests. This affects InRouter302 devices running vulnerable firmware versions, potentially compromising network infrastructure.
💻 Affected Systems
- InHand Networks InRouter302
📦 What is this software?
Ir302 Firmware by Inhandnetworks
⚠️ Risk & Real-World Impact
Worst Case
Complete device takeover, lateral movement to connected networks, data exfiltration, and persistent backdoor installation.
Likely Case
Unauthorized command execution leading to device configuration changes, network disruption, or credential theft.
If Mitigated
Limited impact if proper network segmentation and access controls prevent exploitation attempts.
🎯 Exploit Status
Exploitation requires authentication but is straightforward once access is obtained. Public exploit details are available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: V3.5.5 or later
Vendor Advisory: https://www.inhandnetworks.com/upload/attachment/202205/10/InHand-PSA-2022-01.pdf
Restart Required: Yes
Instructions:
1. Download firmware V3.5.5 or later from InHand Networks support portal. 2. Log into router web interface. 3. Navigate to System > Firmware Upgrade. 4. Upload and install the new firmware. 5. Reboot the device.
🔧 Temporary Workarounds
Network Access Restriction
linuxRestrict HTTP management interface access to trusted IP addresses only
iptables -A INPUT -p tcp --dport 80 -s TRUSTED_IP -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
Authentication Hardening
allChange default credentials and implement strong authentication policies
🧯 If You Can't Patch
- Isolate affected devices in separate VLAN with strict firewall rules
- Implement network monitoring for suspicious HTTP requests to wlscan_ASP endpoint
🔍 How to Verify
Check if Vulnerable:
Check firmware version via web interface at System > Status or via SSH with 'cat /etc/version'Check Version:
cat /etc/versionVerify Fix Applied:
Confirm firmware version is V3.5.5 or later and test that wlscan_ASP endpoint no longer accepts command injection payloads📡 Detection & Monitoring
Log Indicators:
- HTTP requests to /wlscan_ASP with shell metacharacters
- Unusual command execution in system logs
Network Indicators:
- HTTP POST requests to /wlscan_ASP containing pipe characters or semicolons
- Outbound connections from router to unexpected destinations
SIEM Query:
source="router_logs" AND (uri="/wlscan_ASP" AND (content="|" OR content=";" OR content="$" OR content="`"))