CVE-2018-0666 Explained : Impact and Mitigation

Yamaha routers models RT57i, RT58i, NVR500, and RTX810 are affected by a security issue allowing an authorized user to insert custom scripts into the configuration data, potentially executing them on another user's browser.

Understanding CVE-2018-0666

This CVE involves script injection vulnerabilities in Yamaha routers.

What is CVE-2018-0666?

The vulnerability in Yamaha routers allows an authorized user to embed scripts into configuration data, posing a risk of script execution on another user's browser.

The Impact of CVE-2018-0666

The vulnerability enables unauthorized script injection, potentially leading to malicious script execution on other users' browsers.

Technical Details of CVE-2018-0666

Yamaha routers are susceptible to script injection attacks.

Vulnerability Description

Authorized users can insert custom scripts into configuration data, which may be executed on other users' browsers.

Affected Systems and Versions

Yamaha Broadband VoIP Router RT57i Rev.8.00.95 and earlier
Yamaha Broadband VoIP Router RT58i Rev.9.01.51 and earlier
Yamaha Broadband VoIP Router NVR500 Rev.11.00.36 and earlier
Yamaha Gigabit VPN Router RTX810 Rev.11.01.31 and earlier
Yamaha Firewall FWX120 Rev.11.03.25 and earlier
Biz Box Router N58i, N500, NVR500, and RTX810 (NIPPON TELEGRAPH AND TELEPHONE WEST CORPORATION)
Biz Box Router N58i and N500 (NIPPON TELEGRAPH AND TELEPHONE EAST CORPORATION)

Exploitation Mechanism

An authorized user can exploit a specific form field on the configuration page to insert malicious scripts.

Mitigation and Prevention

Protect your systems from CVE-2018-0666.

Immediate Steps to Take

Apply security patches provided by Yamaha Corporation.
Monitor network traffic for any suspicious activities.
Restrict access to the router's configuration page.

Long-Term Security Practices

Regularly update router firmware to the latest version.
Educate users on safe browsing practices and the risks of unauthorized script execution.

Patching and Updates

Ensure all affected routers are updated with the latest firmware patches.