GCP - Storage Post Exploitation

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Cloud Storage

Za više informacija o Cloud Storage, proverite ovu stranicu:

GCP - Storage Enum

Give Public Access

Moguće je dati spoljnim korisnicima (prijavljenim u GCP ili ne) pristup sadržaju kanti. Međutim, po defaultu, kanta će imati onemogućenu opciju da javno izloži kantu:

# Disable public prevention
gcloud storage buckets update gs://BUCKET_NAME --no-public-access-prevention

# Make all objects in a bucket public
gcloud storage buckets add-iam-policy-binding gs://BUCKET_NAME --member=allUsers --role=roles/storage.objectViewer
## I don't think you can make specific objects public just with IAM

# Make a bucket or object public (via ACL)
gcloud storage buckets update gs://BUCKET_NAME --add-acl-grant=entity=AllUsers,role=READER
gcloud storage objects update gs://BUCKET_NAME/OBJECT_NAME --add-acl-grant=entity=AllUsers,role=READER

Ako pokušate da dodelite ACL-ove za bucket sa onemogućenim ACL-ovima, naići ćete na ovu grešku: ERROR: HTTPError 400: Cannot use ACL API to update bucket policy when uniform bucket-level access is enabled. Read more at https://cloud.google.com/storage/docs/uniform-bucket-level-access

Da biste pristupili otvorenim bucket-ima putem pretraživača, pristupite URL-u https://<bucket_name>.storage.googleapis.com/ ili https://<bucket_name>.storage.googleapis.com/<object_name>

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