CVE-2020-3500 : What You Need to Know

A vulnerability in the IPv6 implementation of Cisco StarOS could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.

Understanding CVE-2020-3500

This CVE involves a vulnerability in Cisco StarOS that could lead to a DoS attack.

What is CVE-2020-3500?

The vulnerability in the IPv6 implementation of Cisco StarOS allows an attacker to trigger a DoS condition by sending a crafted IPv6 packet to the device.

The Impact of CVE-2020-3500

Attack Complexity: High
Attack Vector: Network
Availability Impact: High
Base Score: 6.8 (Medium Severity)
Scope: Changed
No Confidentiality or Integrity Impact
No Privileges Required
No User Interaction

Technical Details of CVE-2020-3500

This section provides more technical insights into the vulnerability.

Vulnerability Description

The vulnerability results from insufficient validation of incoming IPv6 traffic, allowing an attacker to cause a device reload and a DoS condition.

Affected Systems and Versions

Product: Cisco ASR 5000 Series Software
Vendor: Cisco
Affected Version: n/a

Exploitation Mechanism

An attacker can exploit this vulnerability by sending a specially crafted IPv6 packet to the device, targeting the vulnerable section of the input buffer.

Mitigation and Prevention

Protecting systems from CVE-2020-3500 is crucial to prevent potential DoS attacks.

Immediate Steps to Take

Apply vendor-provided patches or updates promptly.
Implement network-level controls to filter and block malicious IPv6 traffic.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

Regularly update and patch all software and firmware.
Conduct security assessments and penetration testing to identify vulnerabilities.
Educate users and administrators about safe network practices.

Patching and Updates

Cisco has likely released patches or updates to address this vulnerability. Ensure timely installation to secure affected systems.