CVE-2024-45829
📋 TL;DR
Sharp and Toshiba Tec multifunction printers (MFPs) have a web interface vulnerability where specially crafted HTTP requests can trigger an out-of-bounds read. This can cause affected devices to crash, leading to denial of service. Organizations using affected Sharp and Toshiba Tec MFP models are impacted.
💻 Affected Systems
- Sharp MFPs
- Toshiba Tec MFPs
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device crash requiring physical restart, disrupting printing/scanning services for extended periods
Likely Case
Temporary service disruption until device automatically reboots or is manually restarted
If Mitigated
Minimal impact if devices are behind firewalls and not internet-facing
🎯 Exploit Status
Exploitation requires sending crafted HTTP requests to the web interface
🛠️ 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 from vendor advisories. 2. Download latest firmware from vendor support portal. 3. Apply firmware update following manufacturer instructions. 4. Verify update completion and restart device.
🔧 Temporary Workarounds
Disable web interface
allTurn off web management interface if not required for operations
Network segmentation
allPlace MFPs on isolated network segments with restricted access
🧯 If You Can't Patch
- Implement strict network ACLs to limit access to MFP web interfaces
- Monitor for unusual HTTP requests to MFP management interfaces
🔍 How to Verify
Check if Vulnerable:
Check device model against vendor advisory lists; test with controlled HTTP request to web interfaceCheck Version:
Check firmware version via device web interface or control panelVerify Fix Applied:
Verify firmware version matches patched version in vendor advisory; test web interface functionality📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP requests to MFP web interfaces
- Device reboot events without user action
Network Indicators:
- HTTP requests with malformed query parameters to MFP ports (typically 80/443)
SIEM Query:
source_ip:* dest_port:(80 OR 443) dest_ip:MFP_IP_RANGE http.uri_query:*malformed*