CVE-2020-3295 : What You Need to Know

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

Understanding CVE-2020-3295

This CVE involves multiple vulnerabilities in the web-based management interface of Cisco Small Business RV Series Routers, potentially allowing remote attackers to execute arbitrary code.

What is CVE-2020-3295?

The vulnerabilities in the routers could be exploited by authenticated remote attackers with administrative privileges to execute arbitrary code due to insufficient boundary restrictions on user-supplied input.

The Impact of CVE-2020-3295

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

Technical Details of CVE-2020-3295

Vulnerability Description

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

Affected Systems and Versions

Product: Cisco Small Business RV Series Router Firmware
Vendor: Cisco
Versions: Not Applicable

Exploitation Mechanism

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

Mitigation and Prevention

Immediate Steps to Take

Apply patches and updates provided by Cisco promptly.
Restrict network access to the management interface of the routers.
Monitor network traffic for signs of exploitation.

Long-Term Security Practices

Regularly update firmware and software to mitigate potential vulnerabilities.
Implement strong password policies and multi-factor authentication.

Patching and Updates

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