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DASAN GPON Router RCE Vulnerabilities

Two vulnerabilities have been discovered in DASAN Zhone Solutions' Gigabit-capable Passive Optical Network (GPON) routers, which could be exploited by a remote attacker.
Threat ID:
CC-2326
Category:
Exploit
Threat Severity:
Low
Threat Vector:
Published:
3 May 2018 12:00 AM
Report a cyber attack: call 0300 303 5222 or email [email protected]

This content has been archived

This article no longer conforms to NHS Digital's standards for cyber alerts, and may contain outdated or inaccurate information. Use of this information contained in this page is at your own risk

Summary

Two vulnerabilities have been discovered in DASAN Zhone Solutions' Gigabit-capable Passive Optical Network (GPON) routers, which could be exploited by a remote attacker.

Threat details

The attacker could exploit these to bypass authentication and gain full control over an affected device.

The first vulnerability (CVE-2018-10561) allows a user to append a ?images/ string to a device's web interface URL, both on HTML pages and GponForm/. This effectively bypasses all authentication and allows the user to control the device. The second vulnerability (CVE-2018-10562) allows a user to inject commands once they have control of the device.

Threat updates

Date Update
11 May 2018

Five well-known botnets have been observed exploiting unpatched DASAN GPON routers. The botnets are Hajime, Mettle, Mirai, Muhstik and Satori. Smaller botnets such as Imgay have also been seen.

Remediation steps

Type Step

Users should verify if their routers are GPON-enabled and restrict access to their management interfaces using an IP address whitelist.

To prevent and detect an infection, ensure that:

  • A robust program of education and awareness training is delivered to users to ensure they don’t open attachments or follow links within unsolicited emails.
  • All operating systems, anti-virus and other security products are kept up-to-date.
  • All day-to-day computer activities such as email and internet are performed using non-administrative accounts.
  • Strong password policies are in place and password reuse is discouraged.
  • Network, proxy and firewall logs should be monitored for suspicious activity.
  • User accounts accessed from affected devices should be reset on a clean computer.
  • Your organisation adopts a holistic all-round approach to Cyber Security as advocated by the 10 Steps to Cyber Security.

Last edited: 17 February 2020 12:41 pm