CVE-2020-3568 : Security Advisory and Response
Learn about CVE-2020-3568, a vulnerability in Cisco Email Security Appliance allowing attackers to bypass URL reputation filters. Find mitigation steps and prevention measures here.
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 URL reputation filters on affected devices.
Understanding CVE-2020-3568
This CVE involves a security vulnerability in Cisco Email Security Appliance that could be exploited by attackers to bypass URL reputation filters.
What is CVE-2020-3568?
The vulnerability in Cisco Email Security Appliance allows remote attackers to bypass URL reputation filters by manipulating URLs due to insufficient input validation.
The Impact of CVE-2020-3568
- Attackers can craft URLs to bypass URL reputation filters on affected devices.
- Successful exploitation could permit malicious URLs to pass through the device.
Technical Details of CVE-2020-3568
This section provides technical details of the vulnerability.
Vulnerability Description
The vulnerability is caused by inadequate input validation of URLs in Cisco AsyncOS Software for Cisco Email Security Appliance.
Affected Systems and Versions
- Product: Cisco Email Security Appliance (ESA)
- Vendor: Cisco
- Affected Version: Not applicable
Exploitation Mechanism
- Attack Complexity: Low
- Attack Vector: Network
- Base Score: 5.8 (Medium)
- Integrity Impact: Low
- Privileges Required: None
- User Interaction: None
- Scope: Changed
- Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
Mitigation and Prevention
Protecting systems from CVE-2020-3568 is crucial to prevent potential security breaches.
Immediate Steps to Take
- Apply vendor-provided patches or updates promptly.
- Monitor network traffic for any suspicious activity.
- Implement strong URL filtering policies.
Long-Term Security Practices
- Regularly update and patch all software and systems.
- Conduct security training for employees to recognize phishing attempts.
- Utilize intrusion detection and prevention systems.
Patching and Updates
- Check for security advisories from Cisco regarding this vulnerability.
- Apply recommended patches and updates to mitigate the risk of exploitation.