CVE-2021-1158 : Security Advisory and Response

Multiple vulnerabilities have been identified in the web-based management interface of Cisco Small Business RV Series Routers, including models RV110W, RV130, RV130W, and RV215W. These vulnerabilities could potentially allow a remote attacker to execute cross-site scripting (XSS) attacks on a user of the interface, provided the attacker has valid administrator credentials.

Understanding CVE-2021-1158

This CVE-2021-1158 is related to multiple vulnerabilities found in the web-based management interface of Cisco Small Business RV Series Routers that could allow attackers to conduct XSS attacks.

What is CVE-2021-1158?

The CVE-2021-1158 vulnerability concerns insufficient input validation in the web-based management interface of certain Cisco Small Business RV Series Routers. To exploit this vulnerability, an authenticated remote attacker could send malicious HTTP requests to the affected device.

The Impact of CVE-2021-1158

Successful exploitation of CVE-2021-1158 could enable an attacker to execute arbitrary script code within the context of the affected interface or access sensitive browser-based information. This could be done by leveraging the XSS vulnerability in the Cisco routers.

Technical Details of CVE-2021-1158

This section provides more in-depth technical details regarding the vulnerability.

Vulnerability Description

The vulnerability in the web-based management interface of Cisco Small Business RV Series Routers allows for unauthorized script code execution by an authenticated attacker, leading to potential XSS attacks.

Affected Systems and Versions

The affected systems include Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers. All versions of the firmware are impacted by this vulnerability.

Exploitation Mechanism

To exploit this vulnerability, an attacker must possess valid administrator credentials to send crafted HTTP requests to the targeted device, triggering the XSS attacks.

Mitigation and Prevention

To address CVE-2021-1158, immediate actions are required to secure the affected devices and prevent potential exploits.

Immediate Steps to Take

It is crucial to update the firmware of the affected Cisco Small Business RV Series Routers to the latest version provided by Cisco. Additionally, restrict network access to authorized personnel only.

Long-Term Security Practices

Implement regular security audits, educate users about phishing attacks, and enforce strong password policies to enhance the overall security posture of the network.

Patching and Updates

Regularly check for security advisories from Cisco and apply patches promptly to mitigate the risk of vulnerabilities such as CVE-2021-1158.