Microsoft warned customers today to patch two Active Directory domain service privilege escalation security flaws that, when combined, allow attackers to easily takeover Windows domains.
Redmond’s warning to immediately patch the two bugs – both allowing attackers to impersonate domain controllers – comes after a proof-of-concept tool that can leverage these vulnerabilities was shared on Twitter and GitHub on December 11.
“When combining these two vulnerabilities, an attacker can create a straightforward path to a Domain Admin user in an Active Directory environment that hasn’t applied these new updates,” Microsoft explains in an advisory published today.
“As always, we strongly advise deploying the latest patches on the domain controllers as soon as possible.”
Researchers who tested the PoC stated that they were able to easily use the tool to escalate privileges from standard Active Directory user to a Domain Admin in default configurations.
Replace the marked area with the naming convention of your domain controllers.