Port :88Kerberos

Common Vulnerabilities

• Pass-the-Ticket/Pass-the-Hash Attacks: Attackers with access to valid tickets or hashes can impersonate legitimate users.
• Kerberoasting: Attackers extract service tickets from memory to perform offline brute-force attacks on service account passwords.
• Weak or Reused Passwords: Easily guessable passwords compromise the security of the authentication system.
• Unencrypted Communication: If not properly secured, attackers may intercept or manipulate Kerberos traffic.
• Time-based Attacks: Since Kerberos relies on synchronized clocks, attackers may exploit clock skew or manipulate timestamps.

Common Mitigations

• Enforce Strong Password Policies: Use complex, unique passwords for all accounts involved in Kerberos authentication.
• Enable Pre-Authentication: This reduces effectiveness of brute-force attempts.
• Regularly Rotate and Monitor Service Account Credentials: Limits potential exposure time.
• Use Encryption: Enable and enforce secure encryption algorithms within Kerberos tickets and communication channels.
• Monitor for Anomalies: Utilize SIEM tools to detect suspicious ticket requests, unusual authentication patterns, or privilege escalations.
• Ensure Accurate Time Synchronization: Maintain consistent network time through reliable NTP servers to prevent replay attacks.