CVE-2021-1205 : What You Need to Know

The CVE-2021-1205 involves multiple vulnerabilities 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 cause a denial of service (DoS) condition by exploiting improper validation of user input.

Understanding CVE-2021-1205

This CVE addresses critical security issues in Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers that could lead to unauthorized code execution and service disruption.

What is CVE-2021-1205?

The CVE-2021-1205 pertains to vulnerabilities in the web interface of Cisco Small Business RV Series Routers, enabling attackers to run malicious code or disrupt device services by sending crafted HTTP requests.

The Impact of CVE-2021-1205

The impact of this CVE is severe, with a high CVSS base score of 7.2 due to the potential execution of arbitrary code as the root user or causing device reload, resulting in a DoS condition.

Technical Details of CVE-2021-1205

This section covers specific technical details of the CVE.

Vulnerability Description

The vulnerability arises from improper validation of user input in the web interface, which, when exploited through crafted HTTP requests, allows attackers to execute code as the root user or disrupt device operation.

Affected Systems and Versions

The affected systems include Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers, with all versions being susceptible to these vulnerabilities.

Exploitation Mechanism

To exploit these vulnerabilities, an authenticated remote attacker needs valid administrator credentials to send malicious HTTP requests to the affected device for code execution or inducing a DoS condition.

Mitigation and Prevention

It is crucial to take immediate steps to mitigate the risks associated with CVE-2021-1205.

Immediate Steps to Take

Ensure strict access control and limit administrative privileges on network devices.
Monitor network traffic for any suspicious activities targeting the vulnerable routers.

Long-Term Security Practices

Regularly update firmware and apply security patches provided by Cisco to address these vulnerabilities.
Conduct regular security assessments and penetration testing to identify and remediate potential security weaknesses.

Patching and Updates

Cisco has yet to release software updates to address the CVE-2021-1205 vulnerabilities. Keep monitoring Cisco's security advisories and apply patches promptly upon release.