CVE-2019-3643 : Security Advisory and Response

McAfee Web Gateway (MWG) versions prior to 7.8.2.13 are susceptible to a denial of service vulnerability. This CVE-2019-3643 impacts the scanning proxies within MWG.

Understanding CVE-2019-3643

This CVE affects McAfee Web Gateway (MWG) versions before 7.8.2.13, potentially allowing a remote attacker to exploit the vulnerability and cause a denial of service.

What is CVE-2019-3643?

CVE-2019-3643 is a vulnerability in McAfee Web Gateway (MWG) that could be exploited by a remote attacker to trigger a denial of service attack. The issue specifically affects the scanning proxies within MWG.

The Impact of CVE-2019-3643

The vulnerability has a CVSS base score of 5.3, indicating a medium severity issue. It has a low attack complexity and impact on availability, with no impact on confidentiality or integrity.

Technical Details of CVE-2019-3643

McAfee Web Gateway (MWG) prior to version 7.8.2.13 is affected by this vulnerability.

Vulnerability Description

The vulnerability in MWG allows a remote attacker to exploit the scanning proxies, leading to a denial of service.

Affected Systems and Versions

Product: McAfee Web Gateway (MWG)
Vendor: McAfee, LLC
Vulnerable Version: < 7.8.2.13

Exploitation Mechanism

The vulnerability can be exploited remotely by attackers to cause a denial of service on the affected systems.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of CVE-2019-3643.

Immediate Steps to Take

Update McAfee Web Gateway (MWG) to version 7.8.2.13 or later to mitigate the vulnerability.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

Regularly update and patch all software and systems to prevent known vulnerabilities.
Implement network security measures to detect and block malicious traffic.

Patching and Updates

Ensure that McAfee Web Gateway (MWG) is regularly updated with the latest security patches and fixes to address vulnerabilities.