CVE-2020-5134 : Exploit Details and Defense Strategies

A vulnerability in SonicOS allows an authenticated attacker to cause an out-of-bound invalid file reference, leading to a firewall crash. This CVE affects SonicWall's SonicOS versions 6.5.1.11-4n and earlier, 6.0.5.3-93o and earlier, SonicOSv 6.5.4.4-44v-21-794 and earlier, and SonicOS 7.0.0.0-1.

Understanding CVE-2020-5134

This CVE identifies a specific vulnerability in SonicOS that can be exploited by authenticated attackers.

What is CVE-2020-5134?

The vulnerability in SonicOS allows authenticated attackers to trigger an out-of-bound invalid file reference, resulting in a firewall crash.

The Impact of CVE-2020-5134

The vulnerability can lead to a denial of service (DoS) condition, potentially disrupting network operations and compromising security.

Technical Details of CVE-2020-5134

This section provides more technical insights into the CVE.

Vulnerability Description

The vulnerability in SonicOS enables authenticated attackers to create out-of-bound invalid file references, causing a firewall crash.

Affected Systems and Versions

SonicOS 6.5.1.11-4n and earlier
SonicOS 6.0.5.3-93o and earlier
SonicOSv 6.5.4.4-44v-21-794 and earlier
SonicOS 7.0.0.0-1

Exploitation Mechanism

Attackers with authenticated access can exploit this vulnerability to trigger the out-of-bound file reference, leading to a firewall crash.

Mitigation and Prevention

Protecting systems from CVE-2020-5134 is crucial to maintaining network security.

Immediate Steps to Take

Apply patches provided by SonicWall promptly.
Monitor network traffic for any suspicious activity.
Restrict access to vulnerable systems.

Long-Term Security Practices

Regularly update and patch all software and firmware.
Conduct security audits and assessments periodically.
Educate users on cybersecurity best practices.

Patching and Updates

Ensure that all affected SonicOS versions are updated with the latest patches to mitigate the vulnerability.