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Applications deployed on EC2 instances might require interaction with other AWS resources such as DynamoDB, S3 buckets, etc. On EC2 instances, this is facilitated with the help of instance metadata service (IMDS). The credentials of an instance profile associated with the instance can be retrieved by interacting with IMDS.
Attackers are constantly scanning the IP ranges, looking for vulnerable applications running on EC2 instances. Compromising such a machine can provide them with computation power to perform other attacks and more importantly, it can provide them a foothold inside an AWS account.
In this lab, you are provided terminal based access to an EC2 instance. The instance has IMDSv2 enabled and there is also an S3 bucket on the same AWS account with sensitive information.
Objective: Interact with the instance metadata service and retrieve the flag from the S3 bucket.
Click on RUN to start the lab (takes approximately 25s).
Click on LAB LINK to view the URL of the application.
The following activities are strictly prohibited on this website unless otherwise explicitly stated as allowed in the mission statement:
- Using automated scanners
- Using brute force attacks
- Denial of Service attacks
- Attacking other student machines in challenges where you might achieve a shell on the vulnerable system
- Attacking the lab infrastructure
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