CVE-2019-8316 Explained : Impact and Mitigation

A Command Injection vulnerability in D-Link DIR-878 devices running firmware version 1.12A1 allows remote attackers to execute unauthorized code and gain root access.

Understanding CVE-2019-8316

This CVE involves a critical security issue in D-Link DIR-878 devices that can be exploited by attackers to run arbitrary commands on the system.

What is CVE-2019-8316?

The vulnerability enables remote attackers to execute unauthorized code and obtain root access on affected devices.
It stems from a Command Injection flaw that allows attackers to run arbitrary OS commands through a customized /HNAP1 POST request.

The Impact of CVE-2019-8316

Attackers can exploit this vulnerability to execute malicious commands, potentially leading to system compromise and unauthorized access.

Technical Details of CVE-2019-8316

This section provides more in-depth technical insights into the vulnerability.

Vulnerability Description

The flaw exists in the WebFilterURLs field of the SetWebFilterSettings API function, triggered by any HNAP API function with untrusted input.
Attackers can insert shell metacharacters to execute arbitrary commands.

Affected Systems and Versions

D-Link DIR-878 devices running firmware version 1.12A1 are vulnerable to this exploit.

Exploitation Mechanism

Attackers can leverage the vulnerability by crafting a malicious /HNAP1 POST request to execute unauthorized commands.

Mitigation and Prevention

Protecting systems from CVE-2019-8316 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update the firmware of D-Link DIR-878 devices to the latest version that includes a patch for this vulnerability.
Implement network segmentation to limit the impact of potential attacks.
Monitor network traffic for any suspicious activities.

Long-Term Security Practices

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

Patching and Updates

Apply patches provided by D-Link to address the Command Injection vulnerability and enhance the security of the devices.