CVE-2023-41333
Bypass of namespace restrictions in CiliumNetworkPolicy
描述
Cilium is a networking, observability, and security solution with an eBPF-based dataplane. An attacker with the ability to create or modify CiliumNetworkPolicy objects in a particular namespace is able to affect traffic on an entire Cilium cluster, potentially bypassing policy enforcement in other namespaces. By using a crafted `endpointSelector` that uses the `DoesNotExist` operator on the `reserved:init` label, the attacker can create policies that bypass namespace restrictions and affect the entire Cilium cluster. This includes potentially allowing or denying all traffic. This attack requires API server access, as described in the Kubernetes API Server Attacker section of the Cilium Threat Model. This issue has been resolved in Cilium versions 1.14.2, 1.13.7, and 1.12.14. As a workaround an admission webhook can be used to prevent the use of `endpointSelectors` that use the `DoesNotExist` operator on the `reserved:init` label in CiliumNetworkPolicies.
如何修補 CVE-2023-41333
要修補 CVE-2023-41333,請將受影響套件升級到下列已修補版本。
- —升級至 1.12.14 或更新版本
- —升級至 1.12.14 或更新版本
- —升級至 1.12.14 或更新版本
- —升級至 1.12.14 或更新版本
- —升級至 1.12.14 或更新版本
- —升級至 1.12.14 或更新版本
- —升級至 1.12.14 或更新版本
- —升級至 1.14.2 或更新版本
- —升級至 1.12.14 或更新版本
CVE-2023-41333 正在被利用嗎?
低 — EPSS 為 0.4%,目前沒有觀察到大規模利用活動。
受影響套件(9)
- from 0, < 1.12.14, >= 1.13.0, < 1.13.7, >= 1.14.0, < 1.14.2
- from 0, < 1.12.14, >= 1.13.0, < 1.13.7, >= 1.14.0, < 1.14.2
- from 0, < 1.12.14, >= 1.13.0, < 1.13.7, >= 1.14.0, < 1.14.2
- from 0, < 1.12.14, >= 1.13.0, < 1.13.7, >= 1.14.0, < 1.14.2
- from 0, < 1.12.14, >= 1.13.0, < 1.13.7, >= 1.14.0, < 1.14.2
- from 0, < 1.12.14, >= 1.13.0, < 1.13.7, >= 1.14.0, < 1.14.2
- from 0, < 1.12.14, >= 1.13.0, < 1.13.7, >= 1.14.0, < 1.14.2
- >= 1.14.0, < 1.14.2
- from 0, < 1.12.14, >= 1.13.0, < 1.13.7, >= 1.14.0, < 1.14.2
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.9 | CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:H |