CVE-2020-3543 : Security Advisory and Response

A vulnerability in the Cisco Discovery Protocol of Cisco Video Surveillance 8000 Series IP Cameras could lead to a denial of service (DoS) condition due to a memory leak.

Understanding CVE-2020-3543

This CVE involves a vulnerability in Cisco Video Surveillance 8000 Series IP Cameras related to the Cisco Discovery Protocol, potentially leading to a DoS attack.

What is CVE-2020-3543?

The vulnerability allows an unauthenticated attacker in the same broadcast domain to cause a memory leak by sending specific Cisco Discovery Protocol packets, resulting in a DoS condition on the affected device.

The Impact of CVE-2020-3543

Attack Complexity: Low
Attack Vector: Adjacent Network
Availability Impact: High
CVSS Base Score: 6.5 (Medium Severity)
Vector String: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Technical Details of CVE-2020-3543

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability arises from incorrect processing of specific Cisco Discovery Protocol packets, allowing an attacker to trigger a memory leak and subsequently a DoS condition.

Affected Systems and Versions

Affected Product: Cisco Video Surveillance 8000 Series IP Cameras
Vendor: Cisco
Affected Version: n/a

Exploitation Mechanism

The attacker must be in the same broadcast domain as the affected device to exploit the vulnerability by sending crafted Cisco Discovery Protocol packets.

Mitigation and Prevention

Protect your systems from CVE-2020-3543 with the following steps:

Immediate Steps to Take

Implement network segmentation to limit broadcast domain exposure.
Apply the latest security patches and updates from Cisco.

Long-Term Security Practices

Regularly monitor network traffic for unusual patterns.
Conduct security awareness training to educate users on potential threats.

Patching and Updates

Stay informed about security advisories from Cisco.
Apply patches promptly to mitigate the risk of exploitation.