CVE-2021-1343 : Security Advisory and Response

Multiple vulnerabilities in the web-based management interface of Cisco Small Business RV Series routers could allow an authenticated, remote attacker to execute arbitrary code or cause an affected device to restart unexpectedly.

Understanding CVE-2021-1343

This CVE highlights critical security issues in the web-based management interface of Cisco Small Business RV Series routers.

What is CVE-2021-1343?

The CVE-2021-1343 vulnerability pertains to multiple security flaws in Cisco Small Business RV016, RV042, RV042G, RV082, RV320, and RV325 Routers. These vulnerabilities allow a remote attacker to execute arbitrary code as the root user or trigger a denial of service.

The Impact of CVE-2021-1343

The impact of this vulnerability is rated as high severity, with a CVSS base score of 7.2. An authenticated attacker could exploit these flaws to compromise the affected devices, leading to critical system compromise or disruption.

Technical Details of CVE-2021-1343

This section provides detailed technical insights into the vulnerability.

Vulnerability Description

The vulnerabilities are a result of improper validation of user-supplied input in the web-based management interface. Attackers can exploit these flaws by sending crafted HTTP requests to the router, enabling them to execute arbitrary code or force a device restart.

Affected Systems and Versions

Cisco Small Business RV016, RV042, RV042G, RV082, RV320, and RV325 Routers are affected by this vulnerability, emphasizing the importance of prompt mitigation.

Exploitation Mechanism

To exploit CVE-2021-1343, an attacker needs valid administrator credentials to send malicious HTTP requests to the targeted device, allowing for unauthorized code execution and potential system disruption.

Mitigation and Prevention

Protecting your network from CVE-2021-1343 is crucial to maintain security and operational integrity.

Immediate Steps to Take

It is recommended to update the firmware of the affected routers to the latest patched versions. Additionally, restrict access to the router's web-based management interface and monitor network traffic for any suspicious activities.

Long-Term Security Practices

Implement strong password policies, enable multi-factor authentication, and regularly monitor for security updates and patches provided by Cisco for enhanced protection.

Patching and Updates

Regularly check for security advisories from Cisco and apply patches promptly to ensure your network remains secure against potential vulnerabilities.