CVE-2017-8416 Explained : Impact and Mitigation

A vulnerability was found on D-Link DCS-1100 and DCS-1130 devices due to a buffer overflow issue in a custom daemon, potentially allowing unauthorized code execution.

Understanding CVE-2017-8416

What is CVE-2017-8416?

The vulnerability exists in the D-Link DCS-1100 and DCS-1130 devices, where a custom daemon on UDP port 5978 named "dldps2121" is susceptible to a buffer overflow attack.

The Impact of CVE-2017-8416

The vulnerability allows an attacker to execute commands without authentication by sending a single UDP packet with custom base64 encoding, potentially compromising the device's security.

Technical Details of CVE-2017-8416

Vulnerability Description

The issue arises from an unbounded copy operation in the binary responsible for processing UDP packets, leading to a buffer overflow.

Affected Systems and Versions

D-Link DCS-1100 and DCS-1130 devices are affected.

Exploitation Mechanism

By sending a specially crafted UDP packet, an attacker can trigger the buffer overflow, gaining control over the PC register and enabling code execution.

Mitigation and Prevention

Immediate Steps to Take

Disable the affected daemon or block UDP port 5978 to mitigate the risk.
Regularly monitor network traffic for any suspicious activities.

Long-Term Security Practices

Keep devices updated with the latest firmware and security patches.
Implement network segmentation to limit the impact of potential attacks.
Conduct regular security audits and penetration testing to identify and address vulnerabilities.

Patching and Updates

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