CVE-2020-5133 : Security Advisory and Response
Learn about CVE-2020-5133, a critical SonicOS vulnerability allowing remote attackers to cause a firewall crash via buffer overflow. Find mitigation steps here.
A vulnerability in SonicOS allows a remote unauthenticated attacker to cause Denial of Service due to buffer overflow, affecting SonicWall's SonicOS versions.
Understanding CVE-2020-5133
This CVE identifies a critical vulnerability in SonicOS that can lead to a firewall crash due to a buffer overflow.
What is CVE-2020-5133?
The vulnerability in SonicOS enables a remote unauthenticated attacker to trigger a Denial of Service (DoS) attack by exploiting a buffer overflow issue.
The Impact of CVE-2020-5133
The vulnerability can result in a firewall crash, potentially disrupting network operations and compromising security.
Technical Details of CVE-2020-5133
SonicOS versions are affected by this vulnerability.
Vulnerability Description
The vulnerability allows remote unauthenticated attackers to exploit a buffer overflow, leading to 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 can exploit the buffer overflow remotely without authentication, causing a DoS condition and firewall crash.
Mitigation and Prevention
Taking immediate steps and implementing long-term security practices are crucial to mitigate the risks associated with CVE-2020-5133.
Immediate Steps to Take
- Apply vendor-supplied patches promptly
- Monitor network traffic for any suspicious activity
- Implement firewall rules to restrict unauthorized access
Long-Term Security Practices
- Regularly update and patch all software and firmware
- Conduct security assessments and penetration testing
- Educate users on cybersecurity best practices
Patching and Updates
- Install the latest updates and patches provided by SonicWall to address the vulnerability