CVE-2019-7474 : Exploit Details and Defense Strategies

A vulnerability has been discovered in the SonicWall SonicOS and SonicOSv which allows authenticated read-only administrators to cause the firewall to become unstable by downloading a certificate with a specific extension. This vulnerability affects various versions of SonicOS Gen 5 (5.9.1.10 and earlier) and Gen 6 (6.2.7.3, 6.5.1.3, 6.5.2.2, 6.5.3.1, 6.2.7.8, 6.4.0.0, 6.5.1.8, 6.0.5.3-86o) as well as SonicOSv versions 6.5.0.2-8v_RC363 (VMWARE), 6.5.0.2.8v_RC367 (AZURE), 6.5.0.2.8v_RC368 (AWS), and 6.5.0.2.8v_RC366 (HYPER_V).

Understanding CVE-2019-7474

This section provides insights into the nature and impact of the CVE-2019-7474 vulnerability.

What is CVE-2019-7474?

CVE-2019-7474 is a vulnerability in SonicWall SonicOS and SonicOSv that allows authenticated read-only administrators to destabilize the firewall by downloading a certificate with a specific extension.

The Impact of CVE-2019-7474

The vulnerability can lead to the firewall becoming unstable, potentially impacting the security and functionality of the affected systems.

Technical Details of CVE-2019-7474

Explore the technical aspects of the CVE-2019-7474 vulnerability.

Vulnerability Description

The vulnerability in SonicWall SonicOS and SonicOSv enables authenticated read-only administrators to disrupt the firewall's stability through the download of a certificate with a specific extension.

Affected Systems and Versions

SonicOS Gen 5 versions 5.9.1.10 and earlier, Gen 6 versions 6.2.7.3, 6.5.1.3, 6.5.2.2, 6.5.3.1, 6.2.7.8, 6.4.0.0, 6.5.1.8, 6.0.5.3-86o
SonicOSv versions 6.5.0.2-8v_RC363 (VMWARE), 6.5.0.2.8v_RC367 (AZURE), 6.5.0.2.8v_RC368 (AWS), 6.5.0.2.8v_RC366 (HYPER_V)

Exploitation Mechanism

The vulnerability is exploited by authenticated read-only administrators downloading a certificate with a specific extension, triggering instability in the firewall.

Mitigation and Prevention

Learn how to mitigate and prevent the CVE-2019-7474 vulnerability.

Immediate Steps to Take

Apply security patches provided by SonicWall promptly.
Monitor network traffic for any suspicious activity.
Restrict access to critical systems to authorized personnel only.

Long-Term Security Practices

Regularly update and patch all software and firmware to prevent vulnerabilities.
Conduct security training for employees to enhance awareness of potential threats.

Patching and Updates

Stay informed about security updates and patches released by SonicWall.
Implement a robust patch management process to ensure timely application of fixes.