CVE-2025-29781

mediumPriorität · verfolgen · 0EPSS 0.002 · 8. PerzentilEURUUS
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.18% (8th) EPSS
CVSS 6.5 · medium
Is it mine?
6 products
Prüfe deine Angriffsfläche
Who says so?
4 sources
cnnvd · enisa_euvd · fstec_bdu · osv

EPSS · bewertet 2026-10-28

The Bare Metal Operator (BMO) implements a Kubernetes API for managing bare metal hosts in Metal3. Baremetal Operator enables users to load Secret from arbitrary namespaces upon deployment of the namespace scoped Custom Resource `BMCEventSubscription`. Prior to versions 0.8.1 and 0.9.1, an adversary Kubernetes account with only namespace level roles (e.g. a tenant controlling a namespace) may create a `BMCEventSubscription` in his authorized namespace and then load Secrets from his unauthorized namespaces to his authorized namespace via the Baremetal Operator, causing Secret Leakage. The patch makes BMO refuse to read Secrets from other namespace than where the corresponding BMH resource is. The patch does not change the `BMCEventSubscription` API in BMO, but stricter validation will fail the request at admission time. It will also prevent the controller reading such Secrets, in case the BMCES CR has already been deployed. The issue exists for all versions of BMO, and is patched in BMO releases v0.9.1 and v0.8.1. Prior upgrading to patched BMO version, duplicate any existing Secret pointed to by `BMCEventSubscription`'s `httpHeadersRef` to the same namespace where the corresponding BMH exists. After upgrade, remove the old Secrets. As a workaround, the operator can configure BMO RBAC to be namespace scoped, instead of cluster scoped, to prevent BMO from accessing Secrets from other namespaces, and/or use `WATCH_NAMESPACE` configuration option to limit BMO to single namespace.

01

cvss

Technischer Schweregrad, 0–10. Eine Zeile je Quelle.

6.5
010

Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen

v3.16.5mediumAV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:Nsecondary · FSTEC (BDU) RU
v3.16.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:Nsecondary · ENISA EU
v3.16.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:Nsecondary · security-advisories@github.comAusnutzbarkeit 2 · Auswirkung 4
v3.16.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:Nsecondary · OSV
v3.16mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)
02

SSVC

Eine Handlungsentscheidung — aus Ausnutzung und Auswirkung.

Exploitation: poc · Automatable: no · Technical Impact: partialcoordinatorcisa_ssvcUS
03

schwächen

Die CWE-Schwächeklassen, zu denen dies gehört.

CWE-200USCWE-200USCWE-653USCWE-653USCWE-653US
04

betroffene Produkte (6)

Betroffene Produkte und Versionsbereiche.

05

Advisories (2)

Hersteller- und Ökosystem-Meldungen dazu.

  • GHSA-c98h-7hp9-v9hqBare Metal Operator (BMO) can expose any secret from other namespaces via BMCEventSubscription CRD2025-03-17ghsa · osvUS

    ### Impact The Bare Metal Operator (BMO) implements a Kubernetes API for managing bare metal hosts in Metal3. Baremetal Operator enables users to load Secret from arbitrary namespaces upon deployment of the namespace scoped Custom Resource `BMCEventSubscription` (BMCES). An adversary Kubernetes account with only namespace level roles (e.g. a tenant controlling a namespace) may create a BMCES in their authorized namespace and then load Secrets from their unauthorized namespaces to their authorized namespace via the Baremetal Operator controller's cluster scoped privileges, causing Secret leakage. ### Patches The patch makes BMO refuse to read Secrets from other namespace than where the corresponding Bare Metal Host (BMH) resource is. The patch does not change the `BMCEventSubscription` API in BMO, but stricter validation will deny the request at admission time. It will also prevent the controller reading such Secrets, in case the BMCES resource has already been deployed. The issue exists for all versions of BMO, and is patched in BMO releases v0.9.1 and v0.8.1. Prior upgrading to patched BMO version, duplicate any existing Secret pointed to by `BMCEventSubscription`'s `httpHeadersRef` to the same namespace where the corresponding BMH exists. After upgrade, remove the old Secrets. ### Workarounds Operator can configure BMO RBAC to be namespace scoped, instead of cluster scoped, to prevent BMO from accessing Secrets from other namespaces, and/or use `WATCH_NAMESPACE` configuration option to limit BMO to single namespace. ### References - [patch to main](https://github.com/metal3-io/baremetal-operator/commit/19f8443b1fe182f76dd81b43122e8dd102f8b94c) - [patch to release-0.9](https://github.com/metal3-io/baremetal-operator/pull/2321) - [patch to release-0.8](https://github.com/metal3-io/baremetal-operator/pull/2322) - [BMCEventSubscription design document](https://github.com/metal3-io/metal3-docs/blob/main/design/baremetal-operator/bmc-events.md) ### Credits Metal3 Security Team thanks [WHALEEYE](https://github.com/WHALEEYE) and [debuggerchen](https://github.com/debuggerchen) of [Lab for Internet and Security Technology](https://users.cs.northwestern.edu/~list/) for responsible vulnerability disclosure.

  • GO-2025-3530Bare Metal Operator (BMO) can expose any secret from other namespaces via BMCEventSubscription CRD in github.com/metal3-io/baremetal-operator/apis2025-03-18vendor · osvUS

    Bare Metal Operator (BMO) can expose any secret from other namespaces via BMCEventSubscription CRD in github.com/metal3-io/baremetal-operator/apis

06

auch bekannt als (6)

Weitere Namen und Kennungen dieser Entität.

07

quellen

Welche Quellen diesen Datensatz belegen und wann.

cnnvdenisa_euvdfstec_bduosvNVDCVE.orgMITRE
veröffentlicht 2025-03-17geändert 2026-06-17
08

Referenzen (17)

Externe Belege — Patches, Meldungen, Analysen.

scry

Angreifer nutzen Schwachstellen wie diese gegen im Internet exponierte Dienste aus. Sehen Sie mit einem kostenlosen Passiv-Scan, was exponiert ist.

Kostenloser Scan