CVE-2024-47406
📋 TL;DR
This authentication bypass vulnerability in Sharp and Toshiba Tec multifunction printers allows attackers to bypass HTTP authentication mechanisms and gain unauthorized access to device management interfaces. Organizations using affected MFP models with network connectivity are at risk.
💻 Affected Systems
- Sharp MFPs
- Toshiba Tec MFPs
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of MFP devices allowing attackers to access sensitive scanned documents, modify device configurations, install malicious firmware, and use devices as network footholds for lateral movement.
Likely Case
Unauthorized access to device web interfaces leading to exposure of scanned documents, configuration changes, and potential data exfiltration through device functions.
If Mitigated
Limited impact if devices are isolated on separate VLANs with strict network segmentation and access controls preventing external or unauthorized internal access.
🎯 Exploit Status
Authentication bypass vulnerabilities typically have low exploitation complexity once the specific bypass method is understood.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Firmware updates specified in vendor advisories
Vendor Advisory: https://global.sharp/products/copier/info/info_security_2024-10.html
Restart Required: Yes
Instructions:
1. Identify affected MFP models using vendor advisories. 2. Download latest firmware from vendor support portals. 3. Apply firmware update following vendor instructions. 4. Verify update completion and restart devices.
🔧 Temporary Workarounds
Network Segmentation
allIsolate MFPs on separate VLAN with strict firewall rules
Disable Web Interface
allDisable HTTP/HTTPS management interfaces if not required
🧯 If You Can't Patch
- Implement strict network access controls allowing only authorized IP addresses to access MFP management interfaces
- Enable logging and monitoring for authentication attempts and configuration changes on affected devices
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against vendor advisory lists and attempt to access web interface without proper credentialsCheck Version:
Check device web interface system information page or use vendor-specific management toolsVerify Fix Applied:
Verify firmware version is updated to patched version and test authentication bypass attempts fail📡 Detection & Monitoring
Log Indicators:
- Failed authentication attempts followed by successful access
- Configuration changes from unauthorized IP addresses
- Unusual scanning or printing activity patterns
Network Indicators:
- HTTP requests to MFP management interfaces without authentication headers
- Traffic to MFP devices from unexpected network segments
SIEM Query:
source="mfp-logs" AND (event_type="auth_failure" OR event_type="config_change") | stats count by src_ip dest_ip