CVE-2020-3289 : Exploit Details and Defense Strategies

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

Understanding CVE-2020-3289

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-2020-3289?

The vulnerabilities in the routers' management interface could be exploited by authenticated remote attackers with administrative privileges to execute arbitrary code on the affected devices.

The Impact of CVE-2020-3289

The vulnerabilities could lead to a stack overflow by sending crafted requests with overly large values, potentially causing the device to crash or enabling the attacker to execute code with root privileges.

Technical Details of CVE-2020-3289

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

Attack Complexity: Low
Attack Vector: Network
Privileges Required: High
User Interaction: None
Scope: Unchanged
Impact: High
CVSS Base Score: 7.2
Vector String: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Mitigation and Prevention

Immediate Steps to Take

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

Long-Term Security Practices

Regularly update and patch all network devices.
Implement strong password policies and multi-factor authentication.
Conduct regular security audits and assessments.

Patching and Updates

Cisco has likely released patches to address these vulnerabilities. Ensure to apply the latest firmware updates provided by the vendor.