CVE-2023-28434
MinIO Security Feature Bypass Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 10 October 2023). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
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`.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 7.92% probability · 95th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 19 September 2023 · due 10 October 2023
- Weakness
- CWE-269
- Affected
- minio/minio
- Source
- security-advisories@github.com
EPSS 7.9% since 30 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
CISA notes
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. https://github.com/minio/minio/security/advisories/GHSA-2pxw-r47w-4p8c; https://nvd.nist.gov/vuln/detail/CVE-2023-28434
References
- https://github.com/minio/minio/commit/67f4ba154a27a1b06e48bfabda38355a010dfca5Patch
- https://github.com/minio/minio/pull/16849Exploit, Issue Tracking
- https://github.com/minio/minio/security/advisories/GHSA-2pxw-r47w-4p8cVendor Advisory
- https://github.com/minio/minio/commit/67f4ba154a27a1b06e48bfabda38355a010dfca5Patch
- https://github.com/minio/minio/pull/16849Exploit, Issue Tracking
- https://github.com/minio/minio/security/advisories/GHSA-2pxw-r47w-4p8cVendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-28434US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.