CVE-2019-17508 : Security Advisory and Response

A command injection vulnerability exists in D-Link DIR-859 A3-1.06 and DIR-850 A1.13 devices, allowing malicious actors to exploit the $SERVER variable via /etc/services/DEVICE.TIME.php.

Understanding CVE-2019-17508

This CVE involves a critical security issue in specific D-Link router models that can be exploited through a particular file on the device.

What is CVE-2019-17508?

This CVE identifies a command injection vulnerability in D-Link DIR-859 A3-1.06 and DIR-850 A1.13 devices, enabling unauthorized execution of commands via the $SERVER variable.

The Impact of CVE-2019-17508

The vulnerability allows attackers to execute arbitrary commands on the affected devices, potentially leading to unauthorized access, data theft, or further network compromise.

Technical Details of CVE-2019-17508

This section delves into the specifics of the vulnerability.

Vulnerability Description

The flaw in /etc/services/DEVICE.TIME.php permits command injection through the $SERVER variable, posing a significant security risk.

Affected Systems and Versions

D-Link DIR-859 A3-1.06
D-Link DIR-850 A1.13

Exploitation Mechanism

Attackers can exploit the vulnerability by manipulating the $SERVER variable in the mentioned file to execute malicious commands.

Mitigation and Prevention

Protecting systems from CVE-2019-17508 requires immediate action and long-term security measures.

Immediate Steps to Take

Disable remote access to the affected devices if not required
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 for the devices
Conduct security assessments and penetration testing to identify vulnerabilities
Educate users on best practices for network security
Consider implementing intrusion detection/prevention systems
Employ strong access controls and authentication mechanisms

Patching and Updates

Check for firmware updates from D-Link and apply patches promptly to address the vulnerability