MinIO · MinIO
MinIO, the multi-cloud object storage framework, contains a security feature bypass in its PostPolicyBucket handling, where metadata bucket name checks can be circumvented via crafted requests. An attacker holding credentials with arn:aws:s3:::* permission and with Console API access enabled can use this flaw to place an object into any bucket, network-reachable and without user interaction.
Minio is a Multi-Cloud Object Storage framework. Prior to RELEASE.2023-03-20T20-16-18Z, an attacker can use crafted requests to bypass metadata bucket name checking and put an object into any bucket while processing `PostPolicyBucket`. To carry out this attack, the attacker requires credentials with `arn:aws:s3:::*` permission, as well as enabled Console API access. This issue has been patched in RELEASE.2023-03-20T20-16-18Z. As a workaround, enable browser API access and turn off `MINIO_BROWSER=off`.
First seen exploited 5 months after disclosure. Public exploit code (PoC-in-GitHub) appeared 5 days after disclosure.
CISA KEV listing is when exploitation was confirmed, not necessarily the first attack.
6 related vulnerabilities in the same code over 3 years. The latest fix listed for github.com/minio/minio is 0.0.0-20240527191746-e0fe7cc39172.
Why these are linked: Link confidenceHow strong the evidence is that two CVEs are related. High: stated in the CVE text or linked in an advisory, or the same code was patched one release apart. Medium: the same code, or a version step plus a similar description. Low: similar description only.
Why these are linked: Link confidenceHow strong the evidence is that two CVEs are related. High: stated in the CVE text or linked in an advisory, or the same code was patched one release apart. Medium: the same code, or a version step plus a similar description. Low: similar description only.
Why these are linked: Link confidenceHow strong the evidence is that two CVEs are related. High: stated in the CVE text or linked in an advisory, or the same code was patched one release apart. Medium: the same code, or a version step plus a similar description. Low: similar description only.
Why these are linked: Link confidenceHow strong the evidence is that two CVEs are related. High: stated in the CVE text or linked in an advisory, or the same code was patched one release apart. Medium: the same code, or a version step plus a similar description. Low: similar description only.
Requires valid credentials with broad S3 permissions
the attacker requires credentials with `arn:aws:s3:::*` permission
Unauthorized object writes into arbitrary buckets
put an object into any bucket while processing `PostPolicyBucket`
CVE-specific rules are not available in this build. Search SigmaHQ ↗
These detect the technique in general, not this specific vulnerability.
Sigma rules © SigmaHQ, Detection Rule License 1.1; linked, not reproduced.
1 package in 1 ecosystem. Main package: github.com/minio/minio.
Upgrade to 0.0.0-202303200415 or later
go get github.com/minio/minio@v0.0.0-202303200415The first fix for CVE-2023-28434. No other CVE tracked by Patchfirst affects this package.
| If you run | Upgrade to |
|---|---|
| All versions before 0.0.0-202303200415 | 0.0.0-202303200415 |
“Up to” means the second version is the fix and is not affected.
Pulses are indicator collections that anyone can publish. A mention is not confirmation of exploitation.