Vulnerability from bitnami_vulndb
MinIO 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.
{
"affected": [
{
"package": {
"ecosystem": "Bitnami",
"name": "minio",
"purl": "pkg:bitnami/minio"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2021.03.17"
}
],
"type": "SEMVER"
}
],
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
]
}
],
"aliases": [
"CVE-2021-21390"
],
"database_specific": {
"cpes": [
"cpe:2.3:a:minio:minio:*:*:*:*:*:*:*:*"
],
"severity": "Medium"
},
"details": "MinIO 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.",
"id": "BIT-minio-2021-21390",
"modified": "2026-09-08T08:34:36.952Z",
"published": "2024-03-06T10:58:02.168Z",
"references": [
{
"type": "ADVISORY",
"url": "https://github.com/minio/minio/commit/e197800f9055489415b53cf137e31e194aaf7ba0"
},
{
"type": "ADVISORY",
"url": "https://github.com/minio/minio/pull/11801"
},
{
"type": "ADVISORY",
"url": "https://github.com/minio/minio/security/advisories/GHSA-xr7r-7gpj-5pgp"
},
{
"type": "WEB",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-21390"
}
],
"schema_version": "1.5.0",
"summary": "MITM modification of request bodies in MinIO"
}
Sightings
| Author | Source | Type | Date | Other |
|---|
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