CVE-2020-3368 : Security Advisory and Response

A vulnerability in the antispam protection mechanisms of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to bypass the URL reputation filters on an affected device.

Understanding CVE-2020-3368

This CVE involves a security vulnerability in Cisco Email Security Appliance (ESA) that could be exploited by a remote attacker to bypass URL reputation filters.

What is CVE-2020-3368?

The vulnerability in Cisco Email Security Appliance (ESA) allows attackers to bypass URL reputation filters by manipulating URLs due to insufficient input validation.

The Impact of CVE-2020-3368

If successfully exploited, this vulnerability could permit malicious URLs to pass through the device, compromising the security of the affected system.

Technical Details of CVE-2020-3368

This section provides more technical insights into the CVE.

Vulnerability Description

The vulnerability arises from inadequate input validation of URLs in Cisco AsyncOS Software for Cisco Email Security Appliance (ESA).

Affected Systems and Versions

Product: Cisco Email Security Appliance (ESA)
Vendor: Cisco
Version: Not applicable

Exploitation Mechanism

Attack Complexity: Low
Attack Vector: Network
Base Score: 5.8 (Medium)
Privileges Required: None
User Interaction: None
Scope: Changed
Vector String: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

Mitigation and Prevention

Protecting systems from CVE-2020-3368 is crucial to maintaining security.

Immediate Steps to Take

Apply vendor-provided patches promptly
Monitor network traffic for any suspicious activity
Implement strong URL filtering policies

Long-Term Security Practices

Regularly update and patch all software and firmware
Conduct security training for employees to recognize phishing attempts
Utilize intrusion detection and prevention systems

Patching and Updates

Regularly check for updates and patches from Cisco to address this vulnerability.