What is CVE-2023-28434?

CVE-2023-28434 is a high-severity vulnerability in Minio, classified under Improper Privilege Management. CVSS score: 8.8/10. Published 2023-03-22.

How severe is CVE-2023-28434?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2023-28434 known to be exploited?

Yes. CVE-2023-28434 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-09-19), indicating it is being actively exploited. 18 public proof-of-concept repositories are indexed.

Privilege escalation in Minio

CVE-2023-28434

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…

Vulnerability class: Privilege Escalation

EPSS: 0.521 (98.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Minio — versions < RELEASE.2023-03-20T20-16-18Z

Weakness classification (CWE)

CWE-269 — Improper Privilege Management

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2023-09-19. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2023-10-10.

Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Public proof-of-concept exploits

References

https://github.com/minio/minio/security/advisories/GHSA-2pxw-r47w-4p8c (x_refsource_CONFIRM)
https://github.com/minio/minio/pull/16849 (x_refsource_MISC)
https://github.com/minio/minio/commit/67f4ba154a27a1b06e48bfabda38355a010dfca5 (x_refsource_MISC)

Frequently asked questions

What is CVE-2023-28434?: CVE-2023-28434 is a high-severity vulnerability in Minio, classified under Improper Privilege Management. CVSS score: 8.8/10. Published 2023-03-22.
How severe is CVE-2023-28434?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2023-28434 known to be exploited?: Yes. CVE-2023-28434 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-09-19), indicating it is being actively exploited. 18 public proof-of-concept repositories are indexed.