#VU64789 Improper Enforcement of Message Integrity During Transmission in a Communication Channel in minio - CVE-2021-21390

Vulnerability identifier: #VU64789

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-21390

CWE-ID: CWE-924

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
minio
Other software / Other software solutions

Vendor: minio.io

Description

The vulnerability allows a remote attacker to modify data on the system.

The vulnerability exists due to enabled MITM modification of request bodies that are meant to have integrity guaranteed by chunk signatures. A remote unauthenticated attacker can send a specially crafted data to modify data on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

minio: 2020-01-03T19-12-21Z - 2021-03-12T00-00-47Z

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External links
https://github.com/minio/minio/commit/e197800f9055489415b53cf137e31e194aaf7ba0
https://github.com/minio/minio/pull/11801
https://github.com/minio/minio/security/advisories/GHSA-xr7r-7gpj-5pgp

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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