Security News > 2021 > April > CISA, FBI Warn of Attacks Targeting Fortinet FortiOS

The U.S. government is warning that Advanced Persistent Threat actors are exploiting vulnerabilities in Fortinet FortiOS in ongoing attacks targeting commercial, government, and technology services networks.

The warning, issued in a joint advisory by FBI and the Cybersecurity and Infrastructure Security Agency, follows the recent release of security patches covering serious security flaws in Fortinet's flagship FortiOS product.

The two agencies warned that over the past month threat actors have been observed targeting three vulnerabilities in Fortinet FortiOS, namely CVE-2018-13379, CVE-2020-12812, and CVE-2019-5591.

The two agencies also point out that the recently observed activity surrounding the three Fortinet FortiOS is likely aimed at providing threat actors with access to the networks of commercial, government, and technology services organizations.

"The APT actors may be using any or all of these CVEs to gain access to networks across multiple critical infrastructure sectors to gain access to key networks as pre-positioning for follow-on data exfiltration or data encryption attacks," CISA and the FBI say.

Additional CVEs and other common exploitation techniques may also be employed in attacks aimed at gaining access to critical infrastructure networks, the two agencies also note.

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