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osvGoogleOSV:BIT-CILIUM-2023-34242
HistoryMay 15, 2024 - 12:07 p.m.

BIT-cilium-2023-34242

2024-05-1512:07:15
Google
osv.dev
8
cilium
networking
observability
security
vulnerability
ebpf
dataplane
gateway api
namespace
referencegrant
certificates
services
attacker
cluster
secrets
kubernetes
rbac

CVSS3

5.3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

AI Score

7

Confidence

Low

EPSS

0.001

Percentile

21.5%

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Prior to version 1.13.4, when Gateway API is enabled in Cilium, the absence of a check on the namespace in which a ReferenceGrant is created could result in Cilium unintentionally gaining visibility of secrets (including certificates) and services across namespaces. An attacker on an affected cluster can leverage this issue to use cluster secrets that should not be visible to them, or communicate with services that they should not have access to. Gateway API functionality is disabled by default. This vulnerability is fixed in Cilium release 1.13.4. As a workaround, restrict the creation of ReferenceGrant resources to admin users by using Kubernetes RBAC.

CPENameOperatorVersion
ciliumlt1.13.4

CVSS3

5.3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

AI Score

7

Confidence

Low

EPSS

0.001

Percentile

21.5%

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