CVE-2022-21801 Explained : Impact and Mitigation

A denial of service vulnerability exists in the netserver recv_command functionality of Reolink RLC-410W v3.0.0.136_20121102, allowing attackers to trigger a reboot through a specially-crafted network request.

Understanding CVE-2022-21801

This section provides an overview of the vulnerability and its impact, along with technical details and mitigation strategies.

What is CVE-2022-21801?

The CVE-2022-21801 vulnerability involves a denial of service issue in the netserver recv_command function of Reolink RLC-410W v3.0.0.136_20121102. By sending a malicious network packet, an attacker can exploit this flaw to cause a system reboot.

The Impact of CVE-2022-21801

The impact of CVE-2022-21801 is rated as high, with a CVSS base score of 8.6. This vulnerability can be exploited remotely without requiring user interaction, resulting in a significant availability impact.

Technical Details of CVE-2022-21801

In this section, we dive deeper into the technical aspects of the CVE-2022-21801 vulnerability.

Vulnerability Description

The CVE-2022-21801 vulnerability is classified under CWE-190 (Integer Overflow or Wraparound) and poses a risk of triggering a reboot on affected devices through a specially-crafted network request.

Affected Systems and Versions

The vulnerability affects Reolink RLC-410W version 3.0.0.136_20121102.

Exploitation Mechanism

Attackers can exploit this vulnerability by sending a crafted network request to the netserver recv_command function, causing the target system to reboot.

Mitigation and Prevention

Protecting systems from CVE-2022-21801 requires immediate action and long-term security measures.

Immediate Steps to Take

Apply vendor-supplied patches or updates to address the vulnerability promptly.
Implement network segmentation to limit exposure to potential attackers.

Long-Term Security Practices

Regularly monitor vendor security advisories for patches and updates.
Conduct regular security assessments and penetration testing to identify and remediate vulnerabilities.

Patching and Updates

Ensure timely deployment of security patches and firmware updates provided by Reolink to mitigate the CVE-2022-21801 vulnerability.