What it is
MinIO contains a security feature bypass vulnerability that allows an attacker to use crafted requests to bypass metadata bucket name checking and put an object into any bucket while processing `PostPolicyBucket` to conduct privilege escalation. To carry out this attack, the attacker requires credentials with `arn:aws:s3:::*` permission, as well as enabled Console API access.
What to do
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Vendor notices and references
- github.com/minio/minio/security/advisories/GHSA-2pxw-r47w-4p8c
- nvd.nist.gov/vuln/detail/CVE-2023-28434
Description and required action as published by CISA. Full record at NVD.