CVE-2021-1598 : Security Advisory and Response
Learn about CVE-2021-1598 affecting Cisco Video Surveillance 7000 Series IP Cameras due to LLDP memory leak vulnerabilities, allowing DoS attacks. Understand the impact, technical details, and mitigation steps.
Cisco Video Surveillance 7000 Series IP Cameras are affected by multiple vulnerabilities in the Link Layer Discovery Protocol (LLDP) implementation, potentially leading to denial of service (DoS) attacks. To exploit these vulnerabilities, an unauthenticated, adjacent attacker must send crafted LLDP packets to the affected device, causing it to crash and reload. Here's everything you need to know about CVE-2021-1598.
Understanding CVE-2021-1598
This section delves into the details of the CVE-2021-1598 vulnerability.
What is CVE-2021-1598?
The vulnerabilities in the LLDP implementation for Cisco Video Surveillance 7000 Series IP Cameras could let an attacker cause a memory leak, resulting in a DoS condition on the affected device due to incorrect processing of certain LLDP packets. This requires the attacker to be in the same broadcast domain as the affected device.
The Impact of CVE-2021-1598
The impact of these vulnerabilities includes the potential for an attacker to continuously consume memory on the affected device, leading to crashes and reloads, causing a DoS condition.
Technical Details of CVE-2021-1598
This section provides a technical overview of CVE-2021-1598.
Vulnerability Description
The vulnerabilities stem from incorrect processing of LLDP packets, allowing an adjacent, unauthenticated attacker to exploit them by sending specifically crafted LLDP packets causing memory leaks and subsequent DoS conditions.
Affected Systems and Versions
The Cisco Video Surveillance 7000 Series IP Cameras are affected by these vulnerabilities, impacting all versions.
Exploitation Mechanism
To exploit CVE-2021-1598, an attacker must be in the same broadcast domain as the affected device and send malicious LLDP packets to trigger memory leaks and initiate DoS attacks.
Mitigation and Prevention
Learn how to mitigate and prevent the risks associated with CVE-2021-1598.
Immediate Steps to Take
Immediately deploy patches or workarounds provided by Cisco to address the vulnerabilities in the LLDP implementation for Cisco Video Surveillance 7000 Series IP Cameras.
Long-Term Security Practices
Implement network segmentation and access controls to limit the exposure of devices to adjacent unauthenticated attackers in the same broadcast domain.
Patching and Updates
Regularly monitor and apply security patches and updates for the affected Cisco Video Surveillance 7000 Series IP Cameras to protect against potential DoS attacks.