Background exploitation KEV catalog

CVE-2023-28434

MinIO Security Feature Bypass Vulnerability

CheckOps priority index

5.0/10 Patch within 7 days

Severity8.8

Probability0.8

Exploitation2/5

Severity = CVSS. Probability = EPSS (FIRST). Exploitation = public signals: KEV, EUVD, ransomware, EPSS above 10 %, no account required.

EPSS · today 7.9% higher than 94.7% of CVEs

CVSS 3.1 8.8 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:

Exploited for 1,142 days 19 Sept 2023

CISA due date 10 Oct 2023 for US federal agencies

Exploitation probability EPSS · FIRST

EPSS probability (%)Percentile among all CVEs

Exploitation signals 2 / 5

KEV catalog (CISA)19 Sept 2023
Exploited in EUVD (ENISA)19 Sept 2023
Used by ransomwareno
EPSS above 10 %7.9%
No account, over the networkno

What to do

Fix

Apply the vendor’s fix as soon as it is available.

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

Meanwhile

Take the service off the internet or restrict access to it, watch the logs and look for signs of compromise.

Manufacturers (CRA)

Exploited vulnerability in your product: early warning to ENISA within 24 h, then notification within 72 h (Article 14 of the Cyber Resilience Act). The CRA explained

Description ENISA EUVD

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 products

minioMinIO

Affected versions

< RELEASE.2023-03-20T20-16-18Z

Weaknesses (CWE)

CWE-269

Open source packages OSV

Affected libraries according to OSV, with fixed versions.

Timeline

22 Mar 2023
Published
19 Sept 2023
Exploitation reported (ENISA)
19 Sept 2023
Added to the KEV catalog
10 Oct 2023
CISA remediation due date

References

Other exploited vulnerabilities from the same vendor

CVE-2023-28432MinIO Information Disclosure Vulnerability
7.9 · Background exploitation