CVE-2019-3932 : Vulnerability Insights and Analysis

The Crestron AM-100 and AM-101 devices with specific firmware versions are susceptible to an authentication bypass vulnerability due to a hard-coded password, potentially allowing unauthorized control over external devices.

Understanding CVE-2019-3932

This CVE involves a security flaw in Crestron AirMedia devices that could be exploited by remote attackers.

What is CVE-2019-3932?

The vulnerability in CVE-2019-3932 allows attackers to bypass authentication on Crestron AM-100 and AM-101 devices, leading to potential unauthorized access and control over external devices.

The Impact of CVE-2019-3932

The presence of a hard-coded password in the return.tgi file of affected firmware versions poses a significant security risk, enabling attackers to exploit the vulnerability remotely and gain control over external devices using uart_bridge.

Technical Details of CVE-2019-3932

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability arises from a pre-set password in the return.tgi file, allowing unauthenticated remote attackers to bypass authentication and take control of external devices.

Affected Systems and Versions

Product: Crestron AirMedia
Vendor: Crestron
Vulnerable Versions: AM-100 firmware 1.6.0.2 and AM-101 firmware 2.7.0.2

Exploitation Mechanism

Attackers can exploit the hard-coded password vulnerability to bypass authentication and gain control over external devices via uart_bridge.

Mitigation and Prevention

Protecting systems from CVE-2019-3932 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update firmware to the latest version that addresses the vulnerability.
Change default passwords and implement strong, unique passwords.
Restrict network access to vulnerable devices.

Long-Term Security Practices

Regularly monitor and audit device configurations for security weaknesses.
Conduct security training for users to raise awareness of best practices.

Patching and Updates

Apply security patches provided by Crestron promptly to mitigate the vulnerability and enhance device security.