佳能多款MFP设备漏洞修复咨询：无法在设置中禁用TLS

Hey there, let’s work through this TLS vulnerability issue with your Canon MFPs. I’ve dealt with these exact models a few times, so here’s a step-by-step approach since you can’t find a direct "disable TLS" option in the device settings:

1. Prioritize Firmware Updates (Most Critical) #

Canon regularly pushes firmware updates to patch security flaws, including outdated TLS configurations. Here’s how to do it:

• On the device’s control panel, navigate to Settings > System Settings > Maintenance (menu labels can vary slightly by model)
• Look for the Firmware Update option. If your MFP is connected to the internet, select "Online Update" to install the latest version directly.
• If online updates aren’t available, download the latest firmware file from Canon’s official support page for your specific model, transfer it to a USB drive, plug the drive into the MFP, and follow on-screen prompts to update.
• Pro tip: Backup your device’s configuration before updating to avoid losing custom settings.

2. Dig for Hidden SSL/TLS Configuration Options #

Sometimes TLS settings are tucked away in advanced menus, not the main settings screen:

• Go to Network Settings > SSL Settings (or Security Settings > Encrypted Communications)
• Look for a TLS Version Selection option—if available, disable TLS 1.0 and TLS 1.1, leaving only TLS 1.2 or higher enabled (these are the secure, non-vulnerable versions)
• If version selection isn’t visible, check for Encryption Suite Settings and only enable strong suites like AES-GCM. Disable any weak suites (e.g., 3DES, RC4) linked to vulnerabilities.

3. Network-Level Hardening (Temporary + Long-Term Fix) #

If adjusting device settings doesn’t work, lock down access at the network layer to mitigate risk:

• Use your router or firewall to restrict incoming traffic to the MFPs’ management ports (e.g., 80, 443, 9100) to only trusted IP addresses in your network.
• On the MFP itself, disable unused network services (like FTP, Telnet, or unused print protocols) via the Network Settings > Service Settings menu. Fewer exposed services mean fewer attack surfaces.
• Enable the MFP’s IP Filter feature (found in Network Settings) to allow only authorized devices to connect to it.

4. Reach Out to Canon Official Support #

If none of the above steps resolve the issue, get in touch with Canon’s technical support team. These models might have:

• A hidden advanced configuration mode (accessible via a specific admin password or web interface) that lets you tweak TLS settings
• A dedicated security patch or tool that isn’t publicly listed on the support site
• Specific guidance tailored to your MFP’s firmware version and vulnerability type

内容的提问来源于stack exchange，提问作者shabeeb vazhakkad