CVE-2021-34734 : Exploit Details and Defense Strategies
Learn about CVE-2021-34734, a vulnerability in Cisco Video Surveillance 7000 Series IP Cameras firmware that could allow denial of service attacks. Explore impact, technical details, and mitigation steps.
A vulnerability in the Link Layer Discovery Protocol (LLDP) implementation for the Cisco Video Surveillance 7000 Series IP Cameras firmware could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition due to improper management of memory resources.
Understanding CVE-2021-34734
This CVE identifies a vulnerability in Cisco Video Surveillance 7000 Series IP Cameras that could be exploited by an adjacent attacker to trigger a DoS condition.
What is CVE-2021-34734?
The vulnerability in the LLDP implementation for Cisco Video Surveillance 7000 Series IP Cameras firmware allows attackers in the same broadcast domain to send crafted LLDP packets, potentially leading to a DoS by causing affected devices to reload.
The Impact of CVE-2021-34734
The impact of this vulnerability is rated as medium with a CVSS base score of 6.5. It could result in a denial of service condition affecting the availability of the affected devices.
Technical Details of CVE-2021-34734
This section covers the technical details of the CVE, including the vulnerability description, affected systems and versions, and the exploitation mechanism.
Vulnerability Description
The vulnerability is a result of improper memory resource management, specifically a double free issue in the LLDP protocol implementation.
Affected Systems and Versions
The vulnerability affects the Cisco Video Surveillance 7000 Series IP Cameras firmware.
Exploitation Mechanism
Attackers exploit this vulnerability by sending specially crafted LLDP packets to the targeted device within the same broadcast domain.
Mitigation and Prevention
Understanding the steps to mitigate and prevent the exploitation of CVE-2021-34734 is crucial for maintaining system security.
Immediate Steps to Take
Immediate steps include monitoring network activity, restricting access to vulnerable devices, and deploying network intrusion detection systems.
Long-Term Security Practices
Implementing network segmentation, keeping systems up to date with security patches, and conducting regular security audits are essential for long-term security.
Patching and Updates
It is important to regularly check for security updates and apply patches provided by Cisco to address the vulnerability in the Cisco Video Surveillance 7000 Series IP Cameras firmware.