CVE-2025-31489
Description
A flaw was found in the Minio package. 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 the access key and bucket name this user might have access to is necessary, and an access key with WRITE permissions is necessary. However, with relevant information in place, uploading random objects to buckets is trivial and easy via curl.
Mitigation
To mitigate this issue, reject requests with x-amz-content-sha256: STREAMING-UNSIGNED-PAYLOAD-TRAILER for now at the LB layer. Ask application users to use STREAMING-AWS4-HMAC-SHA256-PAYLOAD-TRAILER.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7.5 | N/A | N/A |
| Attack Vector | Network | N/A | N/A |
| Attack Complexity | Low | N/A | N/A |
| Privileges Required | None | N/A | N/A |
| User Interaction | None | N/A | N/A |
| Scope | Unchanged | N/A | N/A |
| Confidentiality | None | N/A | N/A |
| Integrity Impact | High | N/A | N/A |
| Availability Impact | None | N/A | N/A |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Understanding the Weakness (CWE)
Access Control,Integrity,Confidentiality
Technical Impact: Gain Privileges or Assume Identity; Modify Application Data; Execute Unauthorized Code or Commands
An attacker could gain access to sensitive data and possibly execute unauthorized code.
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