Researchers H0j3n and Aniq Fakhrul published a working exploit on July 24 that lets a low-privileged Active Directory user obtain a certificate for a Domain Controller and authenticate as that machine.
They codenamed the flaw Certighost. Because Domain Controller accounts carry directory replication rights, the resulting Kerberos credential can retrieve the krbtgt secret through DCSync.
Chick-fil-A has confirmed that over 13,000 customers had their accounts breached in a wave of credential stuffing attacks targeting its website and mobile app between June 17 and June 19. [...]