Description
Alluxio's S3 REST proxy fails to verify AWS Signature Version 4 signatures in its default configuration, allowing unauthenticated attackers to spoof user identity. Attackers can extract usernames from unsigned Authorization headers and impersonate any user, including service accounts, to read, write, and delete arbitrary data.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Alluxio | alluxio | ≤ 2.9.5 | — |
References
- https://github.com/Alluxio/alluxio product
- https://github.com/Alluxio/alluxio/issues/18755 issue-tracking
- https://github.com/Alluxio/alluxio/blob/v2.9.5/core/server/proxy/src/main/java/alluxio/proxy/s3/S3RestUtils.java technical-description
- VulnCheck Advisory: Alluxio through 2.9.5 S3 REST Proxy Authentication Bypass via Unverified Request Signature third-party-advisory