CVE-2020-3293 : Security Advisory and Response

Cisco Small Business RV Series Routers Stack Overflow Arbitrary Code Execution Vulnerabilities

Understanding CVE-2020-3293

This CVE involves multiple vulnerabilities in Cisco Small Business RV Series Routers that could allow remote attackers to execute arbitrary code.

What is CVE-2020-3293?

The vulnerabilities in the web-based management interface of Cisco Small Business RV Series Routers could be exploited by authenticated remote attackers with administrative privileges to execute arbitrary code on affected devices.

The Impact of CVE-2020-3293

These vulnerabilities could lead to a stack overflow, enabling attackers to crash the device or execute arbitrary code with root privileges on the operating system.

Technical Details of CVE-2020-3293

Vulnerability Description

The vulnerabilities are a result of insufficient boundary restrictions on user-supplied input to scripts in the web-based management interface.

Affected Systems and Versions

Cisco Small Business RV320 and RV325 Series Routers
Cisco Small Business RV016, RV042, and RV082 Routers

Exploitation Mechanism

Attackers with administrative privileges can exploit the vulnerabilities by sending crafted requests with overly large values, causing a stack overflow.

Mitigation and Prevention

Immediate Steps to Take

Apply patches provided by Cisco to address the vulnerabilities.
Restrict network access to the management interface of the affected devices.

Long-Term Security Practices

Regularly update firmware and software to the latest versions.
Implement strong password policies and multi-factor authentication.

Patching and Updates

Cisco has released patches to mitigate these vulnerabilities. Ensure timely installation of these patches to secure the affected devices.