High severity · published Mar 22, 2023
CVE-2023-28433
Minio Privilege Escalation on Windows via Path separator manipulation
8.8
CVSS
1%
EPSS
No
On KEV
Description
Minio is a Multi-Cloud Object Storage framework. All users on Windows prior to version RELEASE.2023-03-20T20-16-18Z are impacted. MinIO fails to filter the `\` character, which allows for arbitrary object placement across buckets. As a result, a user with low privileges, such as an access key, service account, or STS credential, which only has permission to `PutObject` in a specific bucket, can create an admin user. This issue is patched in RELEASE.2023-03-20T20-16-18Z. There are no known workarounds.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 62% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MI
minio · minio
< RELEASE.2023-03-20T20-16-18Z · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-28433
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-28433
Patch
https://github.com/minio/minio/commit/8d6558b23649f613414c8527b58973fbdfa4d1b8
Patch
https://github.com/minio/minio/commit/b3c54ec81e0a06392abfb3a1ffcdc80c6fbf6ebc
Release Notes
https://github.com/minio/minio/releases/tag/RELEASE.2023-03-20T20-16-18Z
Vendor Advisory
https://github.com/minio/minio/security/advisories/GHSA-w23q-4hw3-2pp6
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