A threat actor that has been using known old FortiOS vulnerabilities to breach FortiGate devices for years has also been leveraging a clever trick to maintain undetected read-only access to them after the original access vector was locked down, Fortinet has revealed on Thursday. “[Read-only access] was achieved via creating a symbolic link connecting the user filesystem and the root filesystem in a folder used to serve language files for the SSL-VPN,” Fortinet CISO Carl … More →

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