CVE-2021-1597 : Vulnerability Insights and Analysis

This CVE-2021-1597 article provides detailed insights into multiple vulnerabilities found in the Link Layer Discovery Protocol (LLDP) implementation for Cisco Video Surveillance 7000 Series IP Cameras, potentially leading to a denial of service (DoS) condition.

Understanding CVE-2021-1597

CVE-2021-1597 pertains to vulnerabilities in the LLDP implementation for Cisco Video Surveillance 7000 Series IP Cameras, allowing an unauthenticated attacker to trigger a memory leak and initiate a DoS attack.

What is CVE-2021-1597?

The vulnerability in CVE-2021-1597 lies in the incorrect processing of specific LLDP packets, enabling an adjacent attacker to send crafted LLDP packets to prompt a device crash and reload.

The Impact of CVE-2021-1597

The impact revolves around memory consumption, causing affected devices to crash due to continuous memory consumption, hence leading to a DoS scenario.

Technical Details of CVE-2021-1597

The CVSS v3.1 base score for CVE-2021-1597 is 6.5, indicating a medium severity vulnerability with a high availability impact. The attack complexity is low, and an attacker requires no privileges to exploit it.

Vulnerability Description

The vulnerability stems from the incorrect handling of LLDP packets in Cisco Video Surveillance 7000 Series IP Cameras, leading to memory leaks and potential DoS attacks.

Affected Systems and Versions

The affected product is the Cisco Video Surveillance 7000 Series IP Cameras, versions not specified.

Exploitation Mechanism

Exploiting these vulnerabilities requires an attacker to be on the same broadcast domain as the target device, presenting a Layer 2 adjacent threat.

Mitigation and Prevention

To address CVE-2021-1597:

Immediate Steps to Take

Apply vendor-provided patches and security updates promptly.
Implement network segmentation to limit exposure to adjacent attackers.

Long-Term Security Practices

Regularly monitor and audit network traffic and devices for any unusual activity.
Train staff on identifying and reporting suspicious network behavior.

Patching and Updates

Stay informed about security advisories from Cisco and apply relevant patches to mitigate the risks effectively.