External risk intelligence

Sumavision Router Enables Unauthorized Administrator Access

CVE advisoryKnown Exploit

CVE-2020-10181

A flaw in Enhanced Multimedia Router firmware allows the creation of unauthorized administrator accounts. This could lead to attackers gaining elevated privileges and control over the device, posing a risk to network operations and data security. Organizations should identify and secure affected devices.

4Halo Surface Signal

Cross-site Request Forgery

Sumavision Enhanced Multimedia Router Firmware

3.0.4.27

External exposure likelihood

Halo Surface Signal score for CVE-2020-10181

This vulnerability affects an Enhanced Multimedia Router, which is typically deployed as an edge network appliance. Such devices are frequently managed via web interfaces that are either directly exposed to the internet or accessible via remote management surfaces, making them likely to be reachable in real-world deployment scenarios.

Horizon Alert

Summary of the vulnerability and why it matters

The Enhanced Multimedia Router (EMR) firmware is susceptible to a flaw that permits the creation of unauthorized administrative users. This weakness could allow attackers to gain elevated privileges on the device. The potential impact includes unauthorized system access and control.

  • Vulnerable router firmware.
  • Allows arbitrary user creation.
  • Business risk of unauthorized access.

Attack Path

How an attacker could exploit the issue

The goform/formEMR30 function in a specific router firmware allows for the creation of new users with administrative privileges. An attacker can exploit this by sending a crafted request to the device. This could result in unauthorized users gaining full control over the affected router, potentially impacting network operations and data security.

  • Device is exposed externally.
  • Attacker sends crafted request.
  • New administrator user is created.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability presents a significant risk, as it allows for the creation of administrator-level user accounts on affected devices. An attacker could gain full control over the device, potentially leading to severe business disruptions and data breaches. The ease of exploitation and the potential for widespread impact necessitate prompt attention.

  • Low skill level required for exploitation.
  • No access or conditions needed.
  • High business risk and urgency.

Priority actions

Operational Fix

Recommended remediation, mitigation, and detection steps

This vulnerability presents a critical risk, enabling unauthorized users to create administrator accounts on affected devices. Such access could allow attackers to gain complete control over the router, potentially disrupting network operations or facilitating further malicious activity. Organizations should prioritize actions to identify and secure these devices.

  • Find affected routers.
  • Isolate exposed routers.
  • Apply vendor fix and monitor.

Frequently asked questions

What is the Sumavision Enhanced Multimedia Router (EMR) and its firmware version affected by CVE-2020-10181?

The Sumavision Enhanced Multimedia Router (EMR) is a networking device. The specific firmware version affected by CVE-2020-10181 is 3.0.4.27.

What type of vulnerability does CVE-2020-10181 represent, and how does it allow unauthorized admin access?

CVE-2020-10181 is a Cross-Site Request Forgery (CSRF) vulnerability. This weakness allows an attacker to trick the router into creating a new administrator account without proper authorization, granting elevated privileges.

How can an attacker exploit the Sumavision EMR vulnerability to gain administrative access?

An attacker can exploit this vulnerability by sending a specially crafted request to the router's goform/formEMR30 function. This request can initiate the creation of an arbitrary user with administrator privileges.

What is the relevance of CVE-2020-10181, considering its external exposure and potential impact?

This vulnerability is relevant because the Enhanced Multimedia Router is often an edge network appliance with a web interface that could be internet-exposed. Exploitation allows for unauthorized administrative control, posing significant business risks. Halo Surface Signal rates the likelihood as 'Likely' due to these factors.

What practical steps should organizations take to address the Sumavision EMR vulnerability?

Organizations should first identify any affected Sumavision EMR devices. It is recommended to isolate exposed routers and then apply any available vendor fixes to secure the devices and monitor for suspicious activity.

References