CVE-2024-4782
📋 TL;DR
An unauthenticated denial-of-service vulnerability in some Lenovo printers allows attackers on the same network to disrupt printer functionality until manual reboot. This affects organizations using vulnerable Lenovo printer models on shared networks. The vulnerability requires no authentication and can be triggered remotely.
💻 Affected Systems
- Lenovo printers (specific models not detailed in reference)
⚠️ 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
Critical printing operations are completely halted across an organization until each affected printer is manually rebooted, causing significant business disruption.
Likely Case
Individual printers become unresponsive, requiring IT staff intervention to reboot affected devices, causing temporary printing outages.
If Mitigated
With proper network segmentation and access controls, only authorized users can reach printers, preventing exploitation.
🎯 Exploit Status
The vulnerability requires network access but no authentication, making exploitation straightforward for attackers on the same network.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Lenovo advisory for specific firmware updates
Vendor Advisory: https://iknow.lenovo.com.cn/detail/422688
Restart Required: Yes
Instructions:
1. Visit Lenovo advisory URL. 2. Identify affected printer models. 3. Download latest firmware from Lenovo support. 4. Apply firmware update following manufacturer instructions. 5. Reboot printer after update.
🔧 Temporary Workarounds
Network Segmentation
allIsolate printers on separate VLANs or network segments to limit access to authorized users only
Access Control Lists
allImplement firewall rules to restrict printer access to specific IP addresses or subnets
🧯 If You Can't Patch
- Segment printers on isolated networks with strict access controls
- Monitor printer availability and implement alerting for unexpected downtime
🔍 How to Verify
Check if Vulnerable:
Check printer model and firmware version against Lenovo advisory. If printer is on shared network and matches affected models, assume vulnerable.Check Version:
Check printer web interface or control panel for firmware version informationVerify Fix Applied:
Verify firmware version has been updated to patched version specified in Lenovo advisory📡 Detection & Monitoring
Log Indicators:
- Unexpected printer reboots
- Printer service crashes
- Connection attempts from unauthorized IPs
Network Indicators:
- Unusual traffic patterns to printer IPs
- Multiple connection attempts to printer ports
SIEM Query:
source="printer_logs" AND (event="crash" OR event="reboot") OR dest_ip="printer_ip_range" AND src_ip NOT IN authorized_ips