CVE-2023-7077
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on Sharp NEC displays by sending specially crafted HTTP requests with unintended parameters. It affects numerous Sharp NEC display models used in corporate, educational, and public display environments. Attackers can potentially take full control of affected displays without authentication.
💻 Affected Systems
- P403
- P463
- P553
- P703
- P801
- X554UN
- X464UN
- X554UNS
- X464UNV
- X474HB
- X464UNS
- X554UNV
- X555UNS
- X555UNV
- X754HB
- X554HB
- E705
- E805
- E905
- UN551S
- UN551VS
- X551UHD
- X651UHD
- X841UHD
- X981UHD
- MD551C8
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise allowing attackers to install persistent malware, pivot to internal networks, manipulate displayed content maliciously, or use displays as attack platforms against other systems.
Likely Case
Display hijacking for defacement, installation of crypto-miners or botnet clients, or credential harvesting from network traffic.
If Mitigated
Limited impact if displays are isolated on separate VLANs with strict network controls and no internet access.
🎯 Exploit Status
Based on CVSS 9.8 score and CWE-22 (path traversal), exploitation likely requires minimal technical skill once details are known.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Firmware updates specified in vendor advisories
Vendor Advisory: https://sharp-displays.jp.sharp/global/support/info/A4_vulnerability.html
Restart Required: Yes
Instructions:
1. Download latest firmware from Sharp NEC support site. 2. Upload firmware via display web interface. 3. Apply update. 4. Reboot display. 5. Verify firmware version.
🔧 Temporary Workarounds
Network segmentation
allIsolate displays on separate VLAN with no internet access and strict firewall rules
Disable web interface
allTurn off HTTP management interface if not required for operations
🧯 If You Can't Patch
- Segment displays on isolated network with strict inbound/outbound firewall rules
- Implement network monitoring for suspicious HTTP requests to display IPs
🔍 How to Verify
Check if Vulnerable:
Check firmware version via display menu or web interface and compare against patched versions in vendor advisoryCheck Version:
Check via display menu: Menu > Information > Version or via web interface at http://[display-ip]/Verify Fix Applied:
Confirm firmware version matches patched version from vendor advisory and test HTTP parameter handling📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP requests to display management interface
- Multiple failed parameter attempts
- Unexpected firmware version changes
Network Indicators:
- HTTP POST/GET requests with unusual parameters to display IPs on port 80/443
- Outbound connections from displays to suspicious IPs
SIEM Query:
source_ip=[display_ip] AND (http_method=POST OR http_method=GET) AND (url_contains="parameter" OR url_contains="cmd")