CVE-2019-9676 Explained : Impact and Mitigation

A vulnerability related to buffer overflow has been discovered in several models of Dahua IP Cameras, specifically the IPC-HFW1XXX, IPC-HDW1XXX, and IPC-HFW2XXX builds prior to November 2018. This vulnerability is present in the redirection display function for serial port printing information, which does not serve any essential purposes for the product. Exploitation of this vulnerability can occur when an attacker gains local access, resulting in device restart or execution of arbitrary code. Dahua has identified these security issues and removed the specific function from newer devices and software versions.

Understanding CVE-2019-9676

This section provides an overview of the vulnerability and its impact.

What is CVE-2019-9676?

CVE-2019-9676 is a buffer overflow vulnerability found in certain Dahua IP Camera models, allowing attackers to execute arbitrary code or cause device restart by exploiting the redirection display function for serial port printing information.

The Impact of CVE-2019-9676

The vulnerability could lead to unauthorized code execution or device restart when exploited by attackers with local access, potentially compromising the security and functionality of the affected Dahua IP Cameras.

Technical Details of CVE-2019-9676

Explore the technical aspects of the vulnerability.

Vulnerability Description

The vulnerability stems from a buffer overflow issue in the redirection display function for serial port printing information in Dahua IP Cameras.

Affected Systems and Versions

Affected Dahua IP Camera models: IPC-HFW1XXX, IPC-HDW1XXX, IPC-HFW2XXX
Vulnerable versions: Builds before November 2018

Exploitation Mechanism

Attackers with local access can exploit the vulnerability to trigger device restart or execute arbitrary code.

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2019-9676.

Immediate Steps to Take

Update affected Dahua IP Cameras to the latest firmware versions provided by Dahua.
Restrict physical access to the cameras to prevent unauthorized exploitation.

Long-Term Security Practices

Regularly monitor and update firmware to address security vulnerabilities.
Implement network segmentation to isolate critical devices from potential threats.

Patching and Updates

Install patches and updates released by Dahua to address the buffer overflow vulnerability in the affected IP Camera models.