CVE-2023-49897
📋 TL;DR
This CVE describes an OS command injection vulnerability in AE1021PE and AE1021 firmware versions 2.0.9 and earlier. Attackers who can authenticate to the device can execute arbitrary operating system commands with system privileges. Organizations using these affected firmware versions are at risk.
💻 Affected Systems
- AE1021PE
- AE1021
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full device compromise leading to botnet recruitment, data exfiltration, lateral movement within networks, and persistent backdoor installation.
Likely Case
Device becomes part of Mirai botnet for DDoS attacks, unauthorized access to network resources, and potential credential theft.
If Mitigated
Limited impact due to network segmentation, strong authentication controls, and monitoring preventing successful exploitation.
🎯 Exploit Status
Actively exploited in the wild as part of Mirai botnet campaigns. Requires valid credentials but default or weak credentials are common.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.1.0 or later
Vendor Advisory: https://www.fxc.jp/news/20231206
Restart Required: Yes
Instructions:
1. Download firmware version 2.1.0 or later from vendor. 2. Backup current configuration. 3. Upload new firmware via web interface. 4. Apply configuration backup. 5. Reboot device.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected devices in separate VLANs with strict firewall rules limiting inbound/outbound connections.
Credential Hardening
allChange all default credentials and implement strong password policies with multi-factor authentication if supported.
🧯 If You Can't Patch
- Implement strict network access controls allowing only necessary traffic to/from devices
- Deploy network-based intrusion detection systems monitoring for command injection patterns and unusual outbound connections
🔍 How to Verify
Check if Vulnerable:
Check firmware version via web interface or SSH: System > Firmware InformationCheck Version:
ssh admin@device_ip 'show version' or check web interface System Status pageVerify Fix Applied:
Confirm firmware version is 2.1.0 or later and test authentication with strong credentials only📡 Detection & Monitoring
Log Indicators:
- Unusual command execution patterns in system logs
- Multiple failed login attempts followed by successful login
- Suspicious process creation
Network Indicators:
- Unexpected outbound connections to known C2 servers
- Unusual traffic patterns consistent with DDoS participation
- Port scanning from device
SIEM Query:
source="device_logs" AND ("cmd.exe" OR "/bin/sh" OR "wget" OR "curl") AND user!="legitimate_user"🔗 References
- https://jvn.jp/en/vu/JVNVU92152057/
- https://www.akamai.com/blog/security-research/zero-day-vulnerability-spreading-mirai-patched
- https://www.cisa.gov/news-events/ics-advisories/icsa-23-355-01
- https://www.fxc.jp/news/20231206
- https://jvn.jp/en/vu/JVNVU92152057/
- https://www.akamai.com/blog/security-research/zero-day-vulnerability-spreading-mirai-patched
- https://www.cisa.gov/news-events/ics-advisories/icsa-23-355-01
- https://www.fxc.jp/news/20231206
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-49897
