CVE-2020-3358 : Security Advisory and Response

A vulnerability in the Secure Sockets Layer (SSL) VPN feature for Cisco Small Business RV VPN Routers could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition by sending a crafted HTTP request.

Understanding CVE-2020-3358

This CVE involves a denial of service vulnerability in Cisco RV Series routers due to improper input validation of HTTP requests.

What is CVE-2020-3358?

The vulnerability in SSL VPN feature of Cisco Small Business RV VPN Routers allows remote attackers to trigger unexpected restarts, leading to DoS.

The Impact of CVE-2020-3358

CVSS Base Score: 8.6 (High Severity)
Attack Vector: Network
Availability Impact: High
Successful exploitation can lead to device reloads and denial of service conditions.

Technical Details of CVE-2020-3358

This section provides detailed technical information about the vulnerability.

Vulnerability Description

The vulnerability arises from a lack of proper input validation of HTTP requests in the SSL VPN feature of Cisco RV Series routers.

Affected Systems and Versions

Affected Product: Cisco Small Business RV Series Router Firmware
Affected Version: n/a

Exploitation Mechanism

Attackers can exploit the vulnerability by sending a crafted HTTP request over an SSL connection to the targeted device.

Mitigation and Prevention

Protect your systems from CVE-2020-3358 with the following steps:

Immediate Steps to Take

Apply vendor-provided patches or updates promptly.
Monitor network traffic for any suspicious activity.

Long-Term Security Practices

Regularly update and patch all network devices.
Implement strong network security measures to prevent unauthorized access.

Patching and Updates

Check for security advisories from Cisco and apply recommended patches.