CVE-2021-21390

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Summary

CVECVE-2021-21390
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-03-19 16:15:00 UTC
Updated2021-03-25 20:29:00 UTC
DescriptionMinIO is an open-source high performance object storage service and it is API compatible with Amazon S3 cloud storage service. In MinIO before version RELEASE.2021-03-17T02-33-02Z, there is a vulnerability which enables MITM modification of request bodies that are meant to have integrity guaranteed by chunk signatures. In a PUT request using aws-chunked encoding, MinIO ordinarily verifies signatures at the end of a chunk. This check can be skipped if the client sends a false chunk size that is much greater than the actual data sent: the server accepts and completes the request without ever reaching the end of the chunk + thereby without ever checking the chunk signature. This is fixed in version RELEASE.2021-03-17T02-33-02Z. As a workaround one can avoid using "aws-chunked" encoding-based chunk signature upload requests instead use TLS. MinIO SDKs automatically disable chunked encoding signature when the server endpoint is configured with TLS.

Risk And Classification

Problem Types: CWE-924

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Minio Minio All All All All

References

ReferenceSourceLinkTags
Chunked body signature check not always applied · Advisory · minio/minio · GitHub CONFIRM github.com
s3v4: read and verify S3 signature v4 chunks separately by aead · Pull Request #11801 · minio/minio · GitHub MISC github.com
s3v4: read and verify S3 signature v4 chunks separately (#11801) · minio/minio@e197800 · GitHub MISC github.com
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