CVE-2018-0257 : Vulnerability Insights and Analysis

Cisco IOS XE Software on Cisco cBR Series Converged Broadband Routers has a vulnerability that could lead to a denial of service attack by causing high CPU usage.

Understanding CVE-2018-0257

A weakness in Cisco IOS XE Software on Cisco cBR Series Converged Broadband Routers allows an adjacent attacker to exploit DHCP packet handling, inducing high CPU usage and a denial of service scenario.

What is CVE-2018-0257?

Vulnerability in Cisco IOS XE Software on Cisco cBR Series Routers
Allows unauthenticated attacker to trigger high CPU usage
Results in denial of service by mishandling DHCP packets

The Impact of CVE-2018-0257

Potential for adjacent attackers to disrupt device operation
Exploitation leads to denial of service condition

Technical Details of CVE-2018-0257

Cisco cBR Series Converged Broadband Routers vulnerability details.

Vulnerability Description

Improper handling of specific DHCP packets
Exploitable by adjacent attackers without authentication

Affected Systems and Versions

Product: Cisco cBR Series Converged Broadband Routers
Version: Cisco cBR Series Converged Broadband Routers

Exploitation Mechanism

Attacker sends specific DHCP packets to affected device segment
Successful exploitation raises CPU usage, causing denial of service

Mitigation and Prevention

Steps to address and prevent CVE-2018-0257.

Immediate Steps to Take

Apply vendor-provided patches and updates
Implement network segmentation to limit attack surface
Monitor network traffic for DHCP packet anomalies

Long-Term Security Practices

Regularly update and patch network devices
Conduct security assessments and audits
Educate staff on cybersecurity best practices

Patching and Updates

Refer to Cisco Security Advisory for specific patch details
Stay informed about security alerts and advisories