CVE-2017-6613 : Security Advisory and Response

A vulnerability in the DNS input packet processor of Cisco Prime Network Registrar could lead to a partial denial of service (DoS) condition on affected systems.

Understanding CVE-2017-6613

What is CVE-2017-6613?

The vulnerability in Cisco Prime Network Registrar allows an unauthenticated remote attacker to temporarily restart the DNS process, potentially causing a DoS situation.

The Impact of CVE-2017-6613

The vulnerability could result in a partial denial of service (DoS) condition on systems running affected versions of Cisco Prime Network Registrar.

Technical Details of CVE-2017-6613

Vulnerability Description

Inadequate validation of the DNS packet header allows an attacker to send a malformed DNS packet, forcing the DNS process to restart.

Affected Systems and Versions

All versions of Cisco Prime Network Registrar software prior to 8.3.5 are vulnerable.

Exploitation Mechanism

An attacker can exploit the vulnerability by sending a specially crafted DNS packet to the application, causing the DNS process to restart.

Mitigation and Prevention

Immediate Steps to Take

Apply the necessary security patches provided by Cisco to address the vulnerability.
Monitor network traffic for any signs of DNS packet manipulation.

Long-Term Security Practices

Regularly update and patch software to prevent known vulnerabilities.
Implement network segmentation to limit the impact of potential attacks.

Patching and Updates

Update Cisco Prime Network Registrar to version 8.3.5 or later to mitigate the vulnerability.