CVE-2019-8319 : Exploit Details and Defense Strategies

A vulnerability has been identified on D-Link DIR-878 devices running firmware 1.12A1, allowing remote attackers to execute unauthorized code and gain root access through Command Injection.

Understanding CVE-2019-8319

This CVE involves a Command Injection vulnerability on D-Link DIR-878 devices.

What is CVE-2019-8319?

The vulnerability enables remote attackers to execute unauthorized code and gain root access by exploiting a specific condition in the /HNAP1 POST request.

The Impact of CVE-2019-8319

Attackers can execute arbitrary operating system commands by exploiting the vulnerability.
Unauthorized code execution and root access can compromise the device's security.

Technical Details of CVE-2019-8319

This section provides technical insights into the vulnerability.

Vulnerability Description

Command Injection vulnerability on D-Link DIR-878 devices with firmware 1.12A1.
Allows attackers to execute arbitrary OS commands through a crafted /HNAP1 POST request.

Affected Systems and Versions

D-Link DIR-878 devices running firmware 1.12A1.

Exploitation Mechanism

Triggered when any HNAP API function invokes the system function using untrusted input from the request body.
Example exploitation includes the use of shell metacharacters in the Gateway field.

Mitigation and Prevention

Protecting systems from CVE-2019-8319 is crucial for maintaining security.

Immediate Steps to Take

Update the firmware of D-Link DIR-878 devices to a patched version.
Implement network segmentation to limit the impact of potential attacks.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update firmware and security patches on all network devices.
Conduct security audits and penetration testing to identify vulnerabilities.

Patching and Updates

Apply patches provided by D-Link to address the Command Injection vulnerability.