CVEs / CVE-2023-28434
CVE-2023-28434: MinIO Security Feature Bypass Vulnerability
- Known exploited in the CISA KEV catalog since 19 Sep 2023
- high 8.8 CVSS 3.1 (NVD)
- EPSS 7.91% chance of exploitation in the next 30 days, higher than 94% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
MinIO contains a security feature bypass vulnerability that allows an attacker to use crafted requests to bypass metadata bucket name checking and put an object into any bucket while processing `PostPolicyBucket` to conduct privilege escalation. To carry out this attack, the attacker requires credentials with `arn:aws:s3:::*` permission, as well as enabled Console API access.
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`.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| minio minio | < RELEASE.2023-03-20T20-16-18Z | — |
| Product | Affected | Fixed in |
|---|---|---|
| github.com/minio/minio (Go) | before 0.0.0-202303200415 | 0.0.0-202303200415 |
Package versions from GHSA-2pxw-r47w-4p8c.
Exploitation
| In CISA KEV since | 19 Sep 2023 |
|---|---|
| Due date for US federal agencies | 10 Oct 2023 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. |
Severity
| CVSS 3.1 | 8.8 highCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HScored by NVD |
|---|---|
| Weakness | CWE-269 |
References
- CVE-2023-28434 on NVD
- CVE-2023-28434 in the CISA KEV catalog
- https://github.com/minio/minio/security/advisories/GHSA-2pxw-r47w-4p8c (cited by CISA)
- CVE-2023-28434 on OSV
- https://github.com/minio/minio/commit/67f4ba154a27a1b06e48bfabda38355a010dfca5 Patch
- https://github.com/minio/minio/pull/16849 Exploit, Issue Tracking
- https://github.com/minio/minio/security/advisories/GHSA-2pxw-r47w-4p8c Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-28434 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.