CVE-2024-36254
📋 TL;DR
An out-of-bounds read vulnerability in Sharp and Toshiba Tec multifunction printers could allow attackers to cause denial-of-service conditions by sending specially crafted requests. This affects multiple MFP models from both manufacturers. Organizations using these devices are at risk of service disruption.
💻 Affected Systems
- Sharp Corporation MFPs
- Toshiba Tec Corporation MFPs
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete printer/service disruption requiring physical restart or service intervention, potentially affecting business operations that rely on printing/scanning functions.
Likely Case
Temporary service interruption affecting printing, scanning, or copying functions until device is restarted.
If Mitigated
Minimal impact if devices are properly segmented and access controlled, with quick restart capability available.
🎯 Exploit Status
Out-of-bounds read vulnerabilities typically require sending malformed requests to trigger the condition. No authentication bypass mentioned in description.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Firmware updates as specified in vendor advisories
Vendor Advisory: https://global.sharp/products/copier/info/info_security_2024-05.html, https://www.toshibatec.co.jp/information/20240531_02.html
Restart Required: Yes
Instructions:
1. Identify affected MFP models using vendor advisories. 2. Download latest firmware from manufacturer support sites. 3. Apply firmware update following manufacturer instructions. 4. Restart devices after update. 5. Verify firmware version post-update.
🔧 Temporary Workarounds
Network segmentation
allIsolate MFPs on separate VLANs with strict access controls
Access control restrictions
allImplement firewall rules to restrict access to MFP management interfaces
🧯 If You Can't Patch
- Segment MFPs on isolated network segments with strict access controls
- Implement monitoring for unusual traffic patterns to MFP devices
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against vendor advisories. Use web interface or device display to verify current firmware version.Check Version:
Check via device web interface (typically http://[printer-ip]) or device control panel under system informationVerify Fix Applied:
Verify firmware version matches or exceeds patched version specified in vendor advisories. Test device functionality after update.📡 Detection & Monitoring
Log Indicators:
- Multiple failed connection attempts to printer services
- Printer service crashes or restarts
- Unusual network traffic patterns to printer IPs
Network Indicators:
- Abnormal packet patterns to printer ports (typically 80, 443, 9100)
- Multiple connection attempts from single source to printer
SIEM Query:
source_ip=[printer_ip] AND (event_type=service_crash OR connection_count>threshold)