CVE-2021-1564 : Exploit Details and Defense Strategies

Multiple vulnerabilities have been discovered in Cisco Video Surveillance 7000 Series IP Cameras related to the Cisco Discovery Protocol and Link Layer Discovery Protocol (LLDP). An attacker could exploit these vulnerabilities to cause a denial of service (DoS) condition on the affected device.

Understanding CVE-2021-1564

This CVE pertains to memory leak vulnerabilities in the Cisco Video Surveillance 7000 Series IP Cameras due to incorrect processing of certain Cisco Discovery Protocol and LLDP packets.

What is CVE-2021-1564?

The vulnerabilities in the Cisco Discovery Protocol and LLDP could be exploited by an unauthenticated, adjacent attacker to cause a memory leak, potentially leading to a DoS condition on the device.

The Impact of CVE-2021-1564

By sending crafted Cisco Discovery Protocol or LLDP packets to a vulnerable device, an attacker could trigger continuous memory consumption, causing the device to crash and reload, resulting in a DoS scenario.

Technical Details of CVE-2021-1564

These technical details provide insights into the vulnerability, affected systems and versions, as well as the exploitation mechanism.

Vulnerability Description

The vulnerabilities arise from the incorrect processing of specific Cisco Discovery Protocol and LLDP packets, allowing attackers in the same broadcast domain to exploit them.

Affected Systems and Versions

The affected product is the Cisco Video Surveillance 7000 Series IP Cameras, and all versions are vulnerable to these memory leak issues.

Exploitation Mechanism

Attackers can exploit these vulnerabilities by sending malicious Cisco Discovery Protocol or LLDP packets to the targeted device, causing continuous memory consumption.

Mitigation and Prevention

To safeguard systems from CVE-2021-1564, immediate action and long-term security practices are crucial.

Immediate Steps to Take

Ensure that proper access controls are in place, monitor network traffic for suspicious activity, and restrict network access to mitigate the risk of exploitation.

Long-Term Security Practices

Regularly update and patch all firmware and software components, conduct security audits, and educate users about best security practices to enhance overall defense.

Patching and Updates

Stay informed about security advisories and updates from Cisco to address and fix the identified memory leak vulnerabilities affecting the Cisco Video Surveillance 7000 Series IP Cameras.