CVE-2022-48471
📋 TL;DR
A misinterpretation of input vulnerability in Huawei printers allows attackers to send specially crafted input that causes the printer service to become abnormal. This affects organizations using vulnerable Huawei printer models, potentially disrupting printing services across networks.
💻 Affected Systems
- Huawei Printers
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete denial of printing services across affected printers, potentially requiring physical restart or service intervention to restore functionality.
Likely Case
Temporary disruption of printing services on targeted printers, causing operational impact until service is restored.
If Mitigated
Minimal impact with proper network segmentation and access controls limiting printer exposure.
🎯 Exploit Status
Vulnerability involves sending specially crafted input to printer service; likely requires network access to printer management interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Huawei advisory for specific fixed firmware versions
Vendor Advisory: https://www.huawei.com/en/psirt/security-advisories/2023/huawei-sa-moivihp-73cabdde-en
Restart Required: Yes
Instructions:
1. Check Huawei advisory for affected models. 2. Download latest firmware from Huawei support. 3. Apply firmware update following Huawei documentation. 4. Restart printer to activate new firmware.
🔧 Temporary Workarounds
Network Segmentation
allIsolate printers on separate VLANs with strict access controls
Access Control Lists
allImplement firewall rules to restrict access to printer management interfaces
🧯 If You Can't Patch
- Segment printers on isolated network segments with strict inbound/outbound filtering
- Disable unnecessary printer services and management interfaces if not required
🔍 How to Verify
Check if Vulnerable:
Check printer model and firmware version against Huawei advisory list of affected devicesCheck Version:
Check printer web interface or management console for firmware versionVerify Fix Applied:
Verify firmware version has been updated to patched version specified in Huawei advisory📡 Detection & Monitoring
Log Indicators:
- Printer service crashes/restarts
- Unusual network traffic to printer management ports
- Failed print jobs with service errors
Network Indicators:
- Unusual traffic patterns to printer ports (typically 9100, 631, 80, 443)
- Multiple connection attempts to printer management interface
SIEM Query:
source_ip=* AND dest_port IN (9100, 631, 80, 443) AND dest_ip=printer_subnet AND bytes_sent > threshold