CVE-2021-1196 Explained : Impact and Mitigation

Multiple vulnerabilities in the web-based management interface of Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers could allow an authenticated, remote attacker to execute arbitrary code or cause an affected device to restart unexpectedly.

Understanding CVE-2021-1196

This CVE involves multiple vulnerabilities in Cisco Small Business RV Series routers that could lead to remote command execution and denial of service attacks.

What is CVE-2021-1196?

The vulnerabilities in this CVE result from improper validation of user-supplied input in the routers' web-based management interface. Attackers could exploit these vulnerabilities by sending crafted HTTP requests to the affected devices, potentially leading to arbitrary code execution as root or causing devices to reload.

The Impact of CVE-2021-1196

The impact of these vulnerabilities is rated high, with a CVSS base score of 7.2. Successful exploitation could allow attackers to execute arbitrary code or trigger denial of service conditions, requiring valid administrator credentials on the affected device.

Technical Details of CVE-2021-1196

This section discusses the specific technical aspects of the CVE.

Vulnerability Description

The vulnerabilities stem from improper user input validation within the web-based management interface, enabling attackers to perform remote code execution or device restarts.

Affected Systems and Versions

The affected products include Cisco Small Business RV Series Router Firmware across various versions.

Exploitation Mechanism

Attackers exploit these vulnerabilities by sending specially crafted HTTP requests to the affected devices, necessitating valid administrator credentials for successful exploitation.

Mitigation and Prevention

Protecting systems against CVE-2021-1196 requires immediate action and long-term security practices.

Immediate Steps to Take

It is crucial to monitor vendor resources for software updates addressing these vulnerabilities and enforce strict access controls to limit potential exploitation.

Long-Term Security Practices

Regular security assessments, network segmentation, and continuous monitoring of network traffic can help prevent unauthorized access and mitigate risks.

Patching and Updates

Stay informed about Cisco's security advisories and promptly apply recommended patches to secure the affected devices.