mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2026-09-14 18:40:48 +02:00
Chris Lu
5a0e017457
* s3: reject virtual-host bucket retargeting via X-Forwarded-Host SigV4 verification tries the client-supplied X-Forwarded-Host as a signed host candidate, while routing and IAM select the bucket from the actual Host header. A presigned URL for one virtual-host bucket could therefore be retargeted to another bucket accessible to the same signing identity by changing Host and adding X-Forwarded-Host. After the signature matches a host candidate, extract the bucket that the candidate implies (via the configured virtual-host domains) and compare it with the bucket the router selected. Reject when they differ, before returning success. * test(s3api): cover virtual-host presigned URL retargeting Add unit tests for bucketFromVirtualHost and end-to-end tests that reproduce the X-Forwarded-Host retargeting attack for both presigned and signed requests, plus a negative test confirming the legitimate same-bucket case still verifies. * s3: harden bucketFromVirtualHost for case and overlapping domains Compare host and domain suffixes case-insensitively so a mixed-case X-Forwarded-Host cannot bypass the consistency check. Only treat the exact path-style domain as non-virtual-host; subdomains of a path-style domain still match the virtual-host router pattern and must be checked.