CVE-2019-5040 : What You Need to Know

A vulnerability in Openweave-core version 4.0.2 and Nest Cam IQ Indoor version 4620002 can lead to the disclosure of sensitive information through crafted weave packets triggering an integer overflow.

Understanding CVE-2019-5040

This CVE involves an information disclosure vulnerability in the Weave MessageLayer parsing of specific versions of Nest Labs products.

What is CVE-2019-5040?

The vulnerability arises from the way Openweave-core 4.0.2 and Nest Cam IQ Indoor 4620002 versions handle Weave MessageLayer, potentially exposing sensitive data.

The Impact of CVE-2019-5040

CVSS Score: 8.2 (High)
Severity: High
Confidentiality Impact: High
Availability Impact: Low

Technical Details of CVE-2019-5040

This section delves into the technical aspects of the vulnerability.

Vulnerability Description

The flaw allows attackers to disclose sensitive information by exploiting an integer overflow in the parsing of Weave MessageLayer.

Affected Systems and Versions

Affected Products: Nest Labs Openweave-core 4.0.2, Nest Cam IQ Indoor version 4620002

Exploitation Mechanism

Crafting a specific weave packet triggers an integer overflow, leading to the reuse of PacketBuffer data.

Mitigation and Prevention

Protecting systems from CVE-2019-5040 requires immediate actions and long-term security practices.

Immediate Steps to Take

Apply security patches promptly
Monitor network traffic for suspicious activities
Implement network segmentation to limit the attack surface

Long-Term Security Practices

Regularly update software and firmware
Conduct security assessments and penetration testing
Educate users on phishing and social engineering tactics

Patching and Updates

Install the latest updates and security patches provided by Nest Labs