Security News > 2020 > October > Critical Vulnerability Allows Hackers to Disrupt SonicWall Firewalls
A significant number of SonicWall firewalls may be affected by a critical vulnerability that can be exploited for denial-of-service attacks and possibly arbitrary code execution.
The vulnerability, identified as CVE-2020-5135, impacts various versions of SonicOS, the operating system powering SonicWall firewalls.
Even for DoS attacks, the vulnerability can pose a serious threat to organizations as an attacker can leverage it to force a targeted firewall to reboot.
Positive Technologies has also been credited by SonicWall this week for finding a dozen other vulnerabilities in SonicOS, including several high-severity DoS flaws that can be exploited remotely without authentication to crash a firewall, and less severe DoS, XSS, brute forcing, and admin username enumeration issues.
"Immediately upon discovery, SonicWall researchers conducted extensive testing and code review to confirm the third-party research. This analysis lead to the discovery of additional unique vulnerabilities to virtual and hardware appliances requiring Common Vulnerabilities and Exposures listings based on the Common Vulnerability Scoring System. The PSIRT team worked to duplicate the issues and develop, test and release patches for the affected products. At this time, SonicWall is not aware of a vulnerability that has been exploited or that any customer has been impacted."
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Related Vulnerability
| DATE | CVE | VULNERABILITY TITLE | RISK |
|---|---|---|---|
| 2020-10-12 | CVE-2020-5135 | Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Sonicwall Sonicos and Sonicosv 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. | 9.8 |