{"schemaVersion":3,"id":"CVE-2021-21390","aliases":["CGA-g6qr-r46m-wc28","CGA-h35g-r8vm-xv85","CGA-mgm8-9c56-wwpc","CGA-r94x-2w69-64vj"],"status":"published","duplicateOf":null,"title":null,"description":"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.","dates":{"published":"2021-03-19T16:00:17.000Z","modified":"2024-08-03T18:09:16.085Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.5,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Wolfi","score":5.9,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","exploitability":5.6,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · 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Enforcement of Message Integrity During Transmission in a Communication Channel","description":"The product establishes a communication channel with an endpoint and receives a message from that endpoint, but it does not sufficiently ensure that the message was not modified during transmission.","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/924.html"}],"affected":[{"vendor":"chainguard","product":"minio","name":"minio","label":"minio","ecosystem":"Chainguard","cpePart":null,"purl":"pkg:apk/chainguard/minio","purlType":"apk","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix 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2021-03-17t02-33-02z","eol":null,"hubHref":"/vendor/minio/minio"}],"affectedCount":5,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/minio/minio/security/advisories/GHSA-xr7r-7gpj-5pgp","label":"github.com/minio/minio/security/advisories/GHSA-xr7r-7gpj-5pgp","hostname":"github.com","tags":["X Refsource CONFIRM","FIX","Exploit","Patch","Third Party Advisory"]},{"url":"https://github.com/minio/minio/pull/11801","label":"github.com/minio/minio/pull/11801","hostname":"github.com","tags":["X Refsource MISC","FIX","Exploit","Patch","Third Party Advisory"]},{"url":"https://github.com/minio/minio/commit/e197800f9055489415b53cf137e31e194aaf7ba0","label":"github.com/minio/minio/commit/e197800f9055489415b53cf137e31e194aaf7ba0","hostname":"github.com","tags":["X Refsource MISC","FIX","Exploit","Patch","Third Party 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