Security Concern: Unrestricted S3 Access in Titiler Policy
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Assessment
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Newbie friendliness
- 35/100
Research direction
Read sam.yml at line 57 and inspect the AWSLambdaExecute policy statement first. Determine the Lambda's required S3 resources from the template and narrow the permissions accordingly; done means the function no longer has unrelated bucket-wide access.
Written by the indexing model from the issue text.
Description
The CloudFormation template (sam.yml) you provided grants the Lambda function unrestricted access to all S3 buckets through the policy associated with the AWSLambdaExecute statement. This presents a significant security risk, as the application might unintentionally access or modify data in buckets unrelated to its intended operations. This could potentially expose sensitive information or disrupt critical business processes.
- Recommendations:
- Refactor the policy: Use a least privilege approach by specifying the exact S3 buckets the function requires access to instead of using wildcards (*).
- Consider IAM roles: Utilize IAM roles to grant specific permissions to the Lambda function instead of relying on the broader AWSLambdaExecute policy.
- Dominant language
- Python
- Stars
- 17
- Forks
- 4
- PR merge metrics
- No merged PRs in 30d
Contributor guide
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
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