CVE-2021-1563 : Security Advisory and Response

Cisco Video Surveillance 7000 Series IP Cameras are impacted by multiple vulnerabilities in the Cisco Discovery Protocol and Link Layer Discovery Protocol (LLDP). These vulnerabilities could allow an attacker to cause a denial of service (DoS) condition by exploiting memory leaks.

Understanding CVE-2021-1563

This CVE highlights critical vulnerabilities in Cisco Video Surveillance 7000 Series IP Cameras related to memory leaks when processing certain protocols.

What is CVE-2021-1563?

CVE-2021-1563 involves vulnerabilities in the implementation of the Cisco Discovery Protocol and LLDP for Cisco Video Surveillance 7000 Series IP Cameras. Attackers could exploit these vulnerabilities to trigger a DoS condition on affected devices by causing them to crash and reload.

The Impact of CVE-2021-1563

The vulnerabilities in CVE-2021-1563 pose a medium-severity threat, enabling unauthenticated adjacent attackers to disrupt device availability by triggering memory leaks and subsequent device crashes.

Technical Details of CVE-2021-1563

The technical specifics of the CVE-2021-1563 vulnerability include:

Vulnerability Description

The vulnerabilities are a result of incorrect processing of certain Cisco Discovery Protocol and LLDP packets at ingress time, ultimately leading to memory leaks and potential DoS conditions.

Affected Systems and Versions

Cisco Video Surveillance 7000 Series IP Cameras are affected by these vulnerabilities across all versions.

Exploitation Mechanism

To exploit CVE-2021-1563, an attacker must send crafted Cisco Discovery Protocol or LLDP packets to the affected device while being in the same broadcast domain (Layer 2 adjacent).

Mitigation and Prevention

In response to CVE-2021-1563, users are advised to take immediate steps and adopt long-term security practices to mitigate risks effectively.

Immediate Steps to Take

Users should ensure proper network segmentation, monitor network traffic for anomalous behavior, and apply relevant security patches as soon as they become available.

Long-Term Security Practices

Implementing strong network access controls, regular security training for personnel, and staying informed about security advisories are essential long-term practices to enhance security posture.

Patching and Updates

Regularly update and patch affected Cisco Video Surveillance 7000 Series IP Cameras with the latest firmware releases and security fixes to address CVE-2021-1563 effectively.