CVE-2020-5135 : What You Need to Know
Learn about CVE-2020-5135, a buffer overflow vulnerability in SonicOS allowing remote attackers to cause DoS and execute arbitrary code. Find mitigation steps here.
A buffer overflow vulnerability in SonicOS allows a remote attacker to cause Denial of Service (DoS) and potentially execute arbitrary code by sending a malicious request to the firewall. This vulnerability affected SonicOS Gen 6 version 6.5.4.7, 6.5.1.12, 6.0.5.3, SonicOSv 6.5.4.v, and Gen 7 version 7.0.0.0.
Understanding CVE-2020-5135
This CVE involves a buffer overflow vulnerability in SonicOS that can be exploited by a remote attacker.
What is CVE-2020-5135?
The vulnerability in SonicOS allows attackers to trigger a buffer overflow, leading to potential DoS and code execution.
The Impact of CVE-2020-5135
- Remote attackers can exploit the vulnerability to cause Denial of Service (DoS) and potentially execute arbitrary code.
Technical Details of CVE-2020-5135
This section provides technical details about the vulnerability.
Vulnerability Description
The vulnerability is a buffer overflow issue in SonicOS that can be triggered by sending a malicious request to the firewall.
Affected Systems and Versions
The following versions of SonicOS are affected:
- SonicOS 6.5.4.7-79n and earlier
- 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 this vulnerability by sending a specially crafted request to the firewall, triggering the buffer overflow.
Mitigation and Prevention
Steps to mitigate and prevent exploitation of CVE-2020-5135.
Immediate Steps to Take
- Apply patches provided by SonicWall promptly.
- Monitor network traffic for any suspicious activity.
- Implement strong firewall rules to restrict unauthorized access.
Long-Term Security Practices
- Regularly update and patch all software and firmware.
- Conduct security audits and penetration testing to identify vulnerabilities.
- Educate users on safe browsing habits and phishing awareness.
Patching and Updates
- Stay informed about security updates from SonicWall.
- Apply patches as soon as they are released to protect against known vulnerabilities.