CVE-2021-1336 Explained : Impact and Mitigation

Multiple vulnerabilities were discovered in the web-based management interface of Cisco Small Business RV Series Routers. These vulnerabilities could allow a remote attacker to execute arbitrary code or trigger a denial of service (DoS) condition. Find out more about CVE-2021-1336 below.

Understanding CVE-2021-1336

This section provides an overview of the CVE-2021-1336 vulnerability affecting Cisco Small Business RV Series Routers.

What is CVE-2021-1336?

The CVE-2021-1336 vulnerability involves multiple security flaws in the web-based management interface of Cisco Small Business RV Series Routers. These flaws could enable a remote attacker to execute arbitrary code with root user privileges or cause a DoS by sending crafted HTTP requests.

The Impact of CVE-2021-1336

The impact of CVE-2021-1336 is significant, as it could lead to unauthorized remote code execution and device restarts, resulting in service disruption.

Technical Details of CVE-2021-1336

In this section, we delve into the technical aspects of the CVE-2021-1336 vulnerability.

Vulnerability Description

The vulnerability stems from improper validation of user-supplied input in the web-based management interface, allowing attackers to exploit the system with crafted HTTP requests.

Affected Systems and Versions

Cisco Small Business RV016, RV042, RV042G, RV082, RV320, and RV325 Routers are affected by this vulnerability.

Exploitation Mechanism

An authenticated attacker could exploit this vulnerability by leveraging valid administrator credentials on the targeted device to send malicious HTTP requests.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-1336, users and administrators are advised to take the following steps:

Immediate Steps to Take

Apply security patches provided by Cisco to address the vulnerability.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update firmware and software to the latest versions.
Implement strong password policies and user access controls.

Patching and Updates

Keep abreast of security advisories from Cisco and promptly apply relevant updates to ensure a secure network environment.