CVE-2023-45225
📋 TL;DR
Multiple Zavio IP camera models with firmware M2.1.6.05 contain stack-based buffer overflow vulnerabilities in XML parsing. Attackers can send specially crafted network requests to execute arbitrary code remotely. Organizations using these specific camera models with vulnerable firmware are affected.
💻 Affected Systems
- Zavio CF7500
- CF7300
- CF7201
- CF7501
- CB3211
- CB3212
- CB5220
- CB6231
- B8520
- B8220
- CD321
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of camera system leading to persistent access, lateral movement to other network devices, or use as botnet node.
Likely Case
Camera compromise allowing video feed interception, credential theft, or denial of service.
If Mitigated
Limited impact if cameras are isolated in separate VLAN with strict network controls.
🎯 Exploit Status
Vulnerability requires sending specially crafted XML but no authentication needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Firmware newer than M2.1.6.05
Vendor Advisory: https://www.cisa.gov/news-events/ics-advisories/icsa-23-304-03
Restart Required: Yes
Instructions:
1. Download latest firmware from Zavio support portal. 2. Backup camera configuration. 3. Upload firmware via web interface. 4. Reboot camera. 5. Restore configuration if needed.
🔧 Temporary Workarounds
Network segmentation
allIsolate cameras in separate VLAN with strict firewall rules.
Access control restrictions
allBlock external access to camera management interfaces.
🧯 If You Can't Patch
- Remove cameras from internet-facing networks immediately
- Implement strict network segmentation with firewall rules blocking all unnecessary traffic to cameras
🔍 How to Verify
Check if Vulnerable:
Check firmware version in camera web interface under System > Information.Check Version:
No CLI command - check via web interface or SNMP if enabledVerify Fix Applied:
Confirm firmware version is newer than M2.1.6.05 in System > Information.📡 Detection & Monitoring
Log Indicators:
- Unusual XML parsing errors
- Multiple failed authentication attempts
- Unexpected camera reboots
Network Indicators:
- Unusual XML payloads to camera ports
- Traffic from cameras to unexpected external IPs
- Port scanning from camera IPs
SIEM Query:
source_ip IN (camera_ips) AND (payload CONTAINS "<malformed_xml>" OR dest_port IN (80, 443, 554))