Hacker groups chain VPN and Windows bugs to attack US government networks

A timely reminder to fix your Fortinet VPN and patch your Windows stuff…:

[…] According to the joint alert, the observed attacks combined two security flaws known as CVE-2018-13379 and CVE-2020-1472.

CVE-2018-13379 is a vulnerability in the Fortinet FortiOS Secure Socket Layer (SSL) VPN, an on-premise VPN server designed to be used as a secure gateway to access enterprise networks from remote locations.

The CVE-2018-13379, disclosed last year, allows attackers to upload malicious files on unpatched systems and take over Fortinet VPN servers.

CVE-2020-1472, also known as Zerologon, is a vulnerability in Netlogon, the protocol used by Windows workstations to authenticate against a Windows Server running as a domain controller.

The vulnerability allows attackers to take over domain controllers, servers users to manage entire internal/enterprise networks and usually contain the passwords for all connected workstations.

CISA and the FBI say attackers are combining these two vulnerabilities to hijack Fortinet servers and then pivot and take over internal networks using Zerologon.

[…]

Original article here