SonicWall is warning customers that a critical vulnerability affecting its SonicOS network security appliance operating system can lead to unauthorized access or a firewall crash.
The flaw is tracked as CVE-2024-40766 and it has been described as an “improper access control vulnerability has been identified in the SonicWall SonicOS management access, potentially leading to unauthorized resource access and in specific conditions, causing the firewall to crash.”
According to the vendor, the vulnerability impacts SonicWall Gen 5, Gen 6 and Gen 7 firewalls.
Updates that resolve the security hole are available for each impacted version. In the case of Gen7 products, SonicWall noted that the issue could not be reproduced on firmware versions higher than 7.0.1-5035, but users are still advised to install the latest version.
No other information has been provided and the vendor has not mentioned anything about in-the-wild exploitation.
However, threat actors exploiting SonicWall product vulnerabilities is not unheard of so it’s important that customers patch their SonicOS instances as soon as possible.
According to Netlas.io, there are roughly 650,000 internet-exposed instances of SonicWall firewalls, including over 400,000 in the United States. It’s unclear how many of them may be impacted by CVE-2024-40766.
Last year, Mandiant reported that it had identified sophisticated malware believed to be of Chinese origin on a SonicWall appliance.
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