Single Sign-On (SSO) Abuse

Summary

Single Sign-On (SSO) Abuse is a type of application attack where adversaries exploit vulnerabilities or misconfigurations in SSO systems to gain unauthorized access to multiple connected services using a single compromised credential or token.

Key Characteristics

• Exploitation of weaknesses in SSO protocols such as SAML, OAuth, or OpenID Connect.
• Use of stolen or forged authentication tokens to bypass multi-factor authentication.
• Leveraging misconfigured identity providers or service providers to escalate privileges.
• Potential lateral movement across multiple applications and services with a single compromised session.
• Difficulty in detection due to legitimate-looking authentication flows.

Defensive Controls

• Implement strict validation and verification of SSO tokens and assertions.
• Enforce multi-factor authentication (MFA) across all SSO-enabled applications.
• Regularly audit and monitor SSO configurations and access logs for anomalies.
• Apply the principle of least privilege to SSO user roles and permissions.
• Use anomaly detection tools to identify unusual login patterns or token usage.

Related Security Solutions

Identity and Access Management (IAM) platforms, Security Information and Event Management (SIEM) systems, Multi-Factor Authentication (MFA) tools, and endpoint detection and response (EDR) solutions are critical in preventing and detecting Single Sign-On abuse.