GitHub Advisoryadvisory · Go
GHSA-wg47-6jq2-q2hh MinIO performs incomplete signature validation for unsigned-trailer uploads
HIGH
Official page ↗
- Aliases
- CVE-2025-31489
- Ecosystem
- Go
- Packages
- github.com/minio/minio
- Severity
- High
- CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Weaknesses
- CWE-347
- Reviewed
- 2025-04-04
Affected packages
• Go github.com/minio/minio: < 0.0.0-20250403145552-8c70975283f9 → fixed in 0.0.0-20250403145552-8c70975283f9
Description
Impact
This is a high priority vulnerability and users must upgrade ASAP.
The signature component of the authorization may be invalid, which would mean that as a client you can use any arbitrary secret to upload objects given the user already has prior WRITE permissions on the bucket,
Prior knowledge of access-key, and bucket name this user might have access to - and an access-key with a WRITE permissions is necessary.
However with relevant information in place, uploading random objects to buckets is trivial and easy via `curl`
Patches
Yes https://github.com/minio/minio/pull/21103
Workarounds
Reject requests with `x-amz-content-sha256: STREAMING-UNSIGNED-PAYLOAD-TRAILER` for now at LB layer, ask application users to use `STREAMING-AWS4-HMAC-SHA256-PAYLOAD-TRAILER`
Related
Alias · CVE (1)
- CVE-2025-31489 MinIO is a High Performance Object Storage released under GNU Affero General Public License v3.0. vulnerability
Weakness · CWE (1)
- CWE-347 Improper Verification of Cryptographic Signature weakness