#VU64791 Improper Authorization in minio - CVE-2021-21362

Vulnerability identifier: #VU64791

Vulnerability risk: Low

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-21362

CWE-ID: CWE-285

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
minio
Other software / Other software solutions

Vendor: minio.io

Description

The vulnerability allows a remote user to modify files on the system.

The vulnerability exists due to improper authorization error in MinIO. A remote user can bypass a readOnly policy by creating a temporary 'mc share upload' URL.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

minio: 2020-01-03T19-12-21Z - 2021-03-01T04-20-55Z

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External links
https://github.com/minio/minio/commit/039f59b552319fcc2f83631bb421a7d4b82bc482
https://github.com/minio/minio/pull/11682
https://github.com/minio/minio/releases/tag/RELEASE.2021-03-04T00-53-13Z
https://github.com/minio/minio/security/advisories/GHSA-hq5j-6r98-9m8v

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.