EUVD-2026-254023

fkie_cve-2025-54290

Information disclosure in image export API in Canonical LXD before 6.5 and 5.21.4 on Linux allows network attackers to determine project existence without authentication via crafted requests using wildcard fingerprints.

GHSA-p3x5-mvmp-5f35 — Canonical LXD Project Existence Determination Through Error Handling in Image Export Function

Affected: Go: github.com/canonical/lxd

### Impact In LXD's images export API (`/1.0/images/{fingerprint}/export`), implementation differences in error handling allow determining project existence without authentication.

Specifically, in the following code, errors when multiple images match are directly returned to users as API responses:

https://github.com/canonical/lxd/blob/43d5189564d27f6161b430ed258c8b56603c2759/lxd/db/images.go#L239-L246

While fingerprints generally don't duplicate, this functionality uses fingerprints with LIKE clauses, allowing prefix specification. Therefore, using LIKE wildcards such as % will match multiple images if multiple images exist in the project.

https://github.com/canonical/lxd/blob/43d5189564d27f6161b430ed258c8b56603c2759/lxd/db/images.go#L277-L286

In the above implementation, multiple matches result in a 500 error, but if the project itself doesn't exist, there are 0 matches and a 404 is returned.

1. When project exists and multiple images match: HTTP 500 error "More than one image matches" 2. When project doesn't exist: HTTP 404 error "not found" This behavioural difference allows attackers to confirm project existence without authentication.

### Reproduction Steps 1. Send a request with a pattern matching multiple entries to an existing project (default):

``` curl -k 'https://lxd-host:8443/1.0/images/%25/export?project=default&secret=x' ```

Response:

```json {"type":"error","status":"","status_code":0,"operation":"","error_code":500,"error":"More than one image…

openSUSE-SU-2025:15710-1 — govulncheck-vulndb-0.0.20251105T184115-1.1 on GA media

govulncheck-vulndb-0.0.20251105T184115-1.1 on GA media

Withdrawn: UBUNTU-CVE-2025-54290

Withdrawn by the publisher.

Affected: Ubuntu:Pro:16.04:LTS: lxd, Ubuntu:Pro:18.04:LTS: lxd, Ubuntu:20.04:LTS: lxd

Most recent entries from all

EUVD-2026-254023

fkie_cve-2025-54290

GHSA-p3x5-mvmp-5f35 — Canonical LXD Project Existence Determination Through Error Handling in Image Export Function

openSUSE-SU-2025:15710-1 — govulncheck-vulndb-0.0.20251105T184115-1.1 on GA media

Withdrawn: UBUNTU-CVE-2025-54290