CVE-2021-1595 : What You Need to Know
Learn about CVE-2021-1595 affecting Cisco Video Surveillance 7000 Series IP Cameras due to memory leak vulnerabilities in LLDP implementation, causing denial of service conditions.
Cisco Video Surveillance 7000 Series IP Cameras are affected by multiple vulnerabilities in the Link Layer Discovery Protocol (LLDP) implementation. These vulnerabilities could lead to a denial of service (DoS) condition on the affected devices.
Understanding CVE-2021-1595
This CVE identifies memory leak vulnerabilities in Cisco Video Surveillance 7000 Series IP Cameras due to incorrect processing of LLDP packets.
What is CVE-2021-1595?
The vulnerability allows an unauthenticated adjacent attacker to trigger a memory leak by sending crafted LLDP packets, potentially causing a DoS condition on the device.
The Impact of CVE-2021-1595
The impact includes a continuous consumption of memory on the affected device, leading to crashes and reloads, resulting in a denial of service situation.
Technical Details of CVE-2021-1595
The vulnerability has a CVSSv3.1 base score of 6.5 with a medium severity rating. It has a low attack complexity and requires no privileges. The attack vector is through an adjacent network with a high availability impact.
Vulnerability Description
The vulnerability arises from incorrect processing of certain LLDP packets, allowing attackers to exploit the device in the same broadcast domain.
Affected Systems and Versions
Cisco Video Surveillance 7000 Series IP Cameras are affected by this vulnerability across all versions.
Exploitation Mechanism
Attackers can exploit the vulnerability by sending crafted LLDP packets to the affected device within the same Layer 2 broadcast domain.
Mitigation and Prevention
To mitigate the risk associated with CVE-2021-1595, immediate steps must be taken followed by long-term security practices.
Immediate Steps to Take
Update the affected devices with the latest patches provided by Cisco. Implement network segmentation to limit broadcast domains.
Long-Term Security Practices
Regularly monitor security advisories from Cisco. Conduct security assessments and audits to identify and address vulnerabilities proactively.
Patching and Updates
Apply vendor-recommended security updates and patches promptly to safeguard the devices against potential exploits.