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Abuse OpenID Connect and GitLab for AWS Access.
- OpenID Connect (OIDC) is an authentication protocol used for verifying a user's identity based on an identity provider's authentication in AWS.
- In integrating GitLab with AWS via OIDC, overly permissive role assumption policies can lead to security breaches.
- CloudFox is a tool for cloud security assessments, assisting in AWS enumeration and privilege escalation analysis.
- Users creating GitLab projects with wide permissions may unknowingly provide threat actors access to AWS resources.
- By assuming a GitLab-assigned role using a specific setup, unauthorized access to AWS resources can be achieved.
- Enumerating AWS resources like S3 buckets can reveal sensitive files, accessed through assumed roles and GitLab-assigned permissions.
- AWS CLI commands and tools like CloudFormation assist in navigating assumed roles and accessing privileged resources.
- Using specific IAM policies and proper configurations can enhance defense against unauthorized access via GitLab and OIDC.
- Cloud security best practices recommend restricting access and securely storing credentials to prevent security vulnerabilities.
- Properly managing IAM policies and connections between GitLab and AWS can help mitigate the risks of unauthorized access.
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