CVE-2017-2911 Explained : Impact and Mitigation

A potential vulnerability has been found in the remote control feature of Circle with Disney, using firmware version 2.0.1. By using SSL certificates corresponding to specific domain names, it is possible for the rclient daemon to mistakenly accept an unintended certificate. Exploiting this vulnerability requires the attacker to set up an HTTPS server with the matching certificate in order to trigger the vulnerability.

Understanding CVE-2017-2911

This CVE entry describes a critical vulnerability affecting Circle Media's Circle product with firmware version 2.0.1.

What is CVE-2017-2911?

CVE-2017-2911 is an exploitable vulnerability in the remote control functionality of Circle with Disney, allowing an attacker to manipulate SSL certificates to trigger unauthorized certificate acceptance.

The Impact of CVE-2017-2911

The vulnerability has a CVSSv3 base score of 9 (Critical) with high impacts on confidentiality, integrity, and availability. It poses a significant risk to affected systems.

Technical Details of CVE-2017-2911

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability in Circle with Disney firmware 2.0.1 allows the rclient daemon to accept unintended SSL certificates, potentially leading to unauthorized access.

Affected Systems and Versions

Product: Circle
Vendor: Circle Media
Firmware Version: 2.0.1

Exploitation Mechanism

To exploit this vulnerability, an attacker needs to set up an HTTPS server with a specific SSL certificate matching the intended domain names to trick the rclient daemon into accepting the unauthorized certificate.

Mitigation and Prevention

Protecting systems from CVE-2017-2911 requires immediate action and long-term security measures.

Immediate Steps to Take

Update Circle devices to the latest firmware version that addresses the vulnerability.
Monitor network traffic for any suspicious activities related to SSL certificate manipulation.

Long-Term Security Practices

Regularly update and patch all software and firmware to prevent known vulnerabilities.
Implement network segmentation and access controls to limit the impact of potential attacks.

Patching and Updates

Circle Media should release patches promptly to fix the SSL certificate validation issue and enhance the security of Circle with Disney devices.