CVE-2021-1173 : Security Advisory and Response

Cisco Small Business RV Series routers are affected by multiple vulnerabilities in their web-based management interface, allowing remote attackers to execute arbitrary code or trigger unexpected device restarts. The root cause is improper validation of user input, which when exploited by sending crafted HTTP requests, can lead to severe consequences. It is essential for users to be aware of the potential risks associated with these vulnerabilities.

Understanding CVE-2021-1173

This section provides insights into the impact, technical details, and mitigation strategies related to CVE-2021-1173.

What is CVE-2021-1173?

CVE-2021-1173 discloses critical vulnerabilities in Cisco Small Business RV Series routers that could enable attackers to execute arbitrary code or cause denial of service by exploiting flaws in the web-based management interface.

The Impact of CVE-2021-1173

With a CVSS base score of 7.2, these vulnerabilities pose a high risk, potentially allowing attackers to gain root access to affected devices, leading to unauthorized code execution or device reloads. Privileged access is required for successful exploitation, emphasizing the importance of maintaining strict access controls.

Technical Details of CVE-2021-1173

Understanding the vulnerability description, affected systems, and exploitation mechanisms is crucial for devising effective mitigation strategies.

Vulnerability Description

The vulnerabilities stem from the lack of proper input validation in the web-based management interface of the Cisco Small Business RV Series routers, enabling attackers to send malicious HTTP requests.

Affected Systems and Versions

The impacted systems include Cisco Small Business RV110W, RV130, RV130W, and RV215W routers running on vulnerable firmware versions.

Exploitation Mechanism

Attackers exploit these vulnerabilities by leveraging crafted HTTP requests to trigger unauthorized code execution or device reloads, potentially leading to a denial of service scenario.

Mitigation and Prevention

Implementing immediate protective measures and establishing long-term security practices are essential to safeguard against CVE-2021-1173.

Immediate Steps to Take

Users should ensure restricted access to the affected devices, validate and monitor incoming traffic for suspicious activity, and review network configurations for any unauthorized changes.

Long-Term Security Practices

Regularly review and apply vendor-provided security updates, enhance network segmentation to isolate critical systems, and conduct routine security assessments to detect and mitigate potential vulnerabilities.

Patching and Updates

Cisco is yet to release software updates addressing the vulnerabilities. Users are advised to monitor official channels for patch releases and promptly apply recommended updates to mitigate the risks posed by CVE-2021-1173.