CVE-2021-1622 : Vulnerability Insights and Analysis
Learn about CVE-2021-1622 affecting Cisco IOS XE Software for Cisco cBR-8 Converged Broadband Routers, leading to denial of service. Explore the impact, technical details, and mitigation strategies.
A vulnerability in the Common Open Policy Service (COPS) of Cisco IOS XE Software for Cisco cBR-8 Converged Broadband Routers could allow an unauthenticated, remote attacker to cause resource exhaustion, resulting in a denial of service (DoS) condition.
Understanding CVE-2021-1622
This CVE-2021-1622 vulnerability impacts Cisco IOS XE Software for Cisco cBR-8 Converged Broadband Routers, potentially leading to a denial of service due to resource exhaustion.
What is CVE-2021-1622?
The vulnerability in the Common Open Policy Service (COPS) could be exploited by an attacker to cause a deadlock condition in the code, leading to a DoS condition by overwhelming the affected device with COPS packets.
The Impact of CVE-2021-1622
A successful exploit could allow an attacker to consume excessive resources, causing the CPU to stop other control plane processes from obtaining resources and resulting in a DoS.
Technical Details of CVE-2021-1622
This section outlines the vulnerability's description, affected systems and versions, and the exploitation mechanism.
Vulnerability Description
The vulnerability arises due to a deadlock condition in the code when processing COPS packets under certain conditions, enabling resource exhaustion and a DoS.
Affected Systems and Versions
Cisco IOS XE Software for Cisco cBR-8 Converged Broadband Routers is affected by this vulnerability, but specific versions are not provided.
Exploitation Mechanism
An attacker can exploit this vulnerability by sending COPS packets with high burst rates to the affected device, causing the CPU to consume excessive resources.
Mitigation and Prevention
Learn about the immediate steps to take and long-term security practices to safeguard your systems against CVE-2021-1622.
Immediate Steps to Take
It is crucial to apply security patches and configurations to mitigate the risk of exploitation. Monitor network traffic for any signs of attempted attacks.
Long-Term Security Practices
Implement network segmentation, access controls, and regular security audits to maintain a secure environment and prevent potential threats.
Patching and Updates
Regularly check for security advisories and updates from Cisco to ensure that your systems are protected from known vulnerabilities.