Misconfigured certificate templates affected by ESC9 pose a serious threat to Active Directory environments, enabling privilege escalation through weak certificate mappings. Attackers can exploit these vulnerabilities to impersonate privileged users like Domain Admins without credentials. #ESC9 #ActiveDirectoryCertificateServices
Keypoints
- Misconfigured certificate templates in AD CS can be exploited using ESC9 to escalate privileges.
- ESC9 occurs when low-privileged users can request certificates with SANs, bypassing security extensions.
- Disabling the szOID_NTDS_CA_SECURITY_EXT extension weakens certificate security enforcement.
- Weak mapping allows attackers to authenticate as high-privilege users using spoofed certificates.
- Mitigation involves enforcing strong certificate binding and removing insecure template flags.
Read More: https://www.hackingarticles.in/adcs-esc9-no-security-extension/