CVE-2021-1347 : Vulnerability Insights and Analysis

Multiple vulnerabilities in the web-based management interface of Cisco Small Business RV Series Routers could allow remote attackers to execute arbitrary code or cause denial of service. Learn about the impact, technical details, and mitigation strategies below.

Understanding CVE-2021-1347

Cisco Small Business RV Series Routers are prone to remote command execution and denial of service vulnerabilities due to improper input validation in the web interface.

What is CVE-2021-1347?

The CVE-2021-1347 vulnerability allows authenticated remote attackers to execute arbitrary code or trigger unexpected device restarts via crafted HTTP requests, posing a serious risk to affected devices.

The Impact of CVE-2021-1347

With a CVSS base score of 7.2, this high-severity vulnerability can lead to unauthorized code execution with root user privileges, potentially resulting in system compromise or denial of service.

Technical Details of CVE-2021-1347

The following technical aspects of the CVE-2021-1347 vulnerability provide insights into the affected systems, exploitation mechanism, and severity.

Vulnerability Description

The vulnerability arises from inadequate validation of user input in the web-based management interface, enabling attackers to manipulate HTTP requests for executing malicious code or causing device reloads.

Affected Systems and Versions

The vulnerability affects Cisco Small Business RV016, RV042, RV042G, RV082, RV320, and RV325 Routers running the vulnerable firmware versions.

Exploitation Mechanism

Attackers can exploit this vulnerability by sending specially crafted HTTP requests to targeted devices, leveraging improper input handling to execute arbitrary commands and disrupt device operations.

Mitigation and Prevention

Understanding the immediate steps, security practices, and patching measures is crucial to mitigating the risks associated with CVE-2021-1347.

Immediate Steps to Take

Immediately update the firmware of the affected Cisco Small Business RV Series Routers to the latest patched version to address the vulnerability and prevent potential exploits.

Long-Term Security Practices

Regularly monitor vendor security advisories, maintain strong administrator credentials, and conduct routine security audits to enhance the overall security posture and mitigate future vulnerabilities.

Patching and Updates

Apply security patches provided by Cisco to fix the vulnerability, implement network segmentation, and restrict access to the management interface to minimize the attack surface and enhance overall network security.