CVE-2023-41333
published 2023-09-27CVE-2023-41333: Cilium is a networking, observability, and security solution with an eBPF-based dataplane. An attacker with the ability to create or modify CiliumNetworkPolicy…
PriorityP340high8.1CVSS 3.1
AVAACLPRHUINSCCNIHAH
EPSS
0.41%
34.8th percentile
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.
Affected
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| cilium | cilium | < 1.12.14 | 1.12.14 |
| cilium | cilium | — | — |
| cilium | cilium | — | — |
| cilium | cilium | >= 1.13.0 < 1.13.7 | 1.13.7 |
| cilium | cilium | >= 1.14.0 < 1.14.2 | 1.14.2 |
| github.com | cilium_cilium | >= 0 < 1.12.14 | 1.12.14 |
| github.com | cilium_cilium | >= 1.13.0 < 1.13.7 | 1.13.7 |
| github.com | cilium_cilium | >= 1.14.0 < 1.14.2 | 1.14.2 |
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OSV
Cilium vulnerable to bypass of namespace restrictions in CiliumNetworkPolicy in github.com/cilium/cilium
osv·2024-08-21
CVE-2023-41333 Cilium vulnerable to bypass of namespace restrictions in CiliumNetworkPolicy in github.com/cilium/cilium
Cilium vulnerable to bypass of namespace restrictions in CiliumNetworkPolicy in github.com/cilium/cilium
Cilium vulnerable to bypass of namespace restrictions in CiliumNetworkPolicy in github.com/cilium/cilium
GHSA
Cilium vulnerable to bypass of namespace restrictions in CiliumNetworkPolicy
ghsa·2023-09-27
CVE-2023-41333 [MEDIUM] CWE-306 Cilium vulnerable to bypass of namespace restrictions in CiliumNetworkPolicy
Cilium vulnerable to bypass of namespace restrictions in CiliumNetworkPolicy
### Impact
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](https://docs.cilium.io/en/stable/security/threat-model/#kubernetes-api-server-attacker) section of the Cilium Threat Model.
OSV
Cilium vulnerable to bypass of namespace restrictions in CiliumNetworkPolicy
osv·2023-09-27
CVE-2023-41333 [MEDIUM] Cilium vulnerable to bypass of namespace restrictions in CiliumNetworkPolicy
Cilium vulnerable to bypass of namespace restrictions in CiliumNetworkPolicy
### Impact
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](https://docs.cilium.io/en/stable/security/threat-model/#kubernetes-api-server-attacker) section of the Cilium Threat Model.
No detection rules found.
No writeups or analysis indexed.
https://docs.cilium.io/en/stable/security/threat-model/#kubernetes-api-server-attackerhttps://github.com/cilium/cilium/pull/28007https://github.com/cilium/cilium/security/advisories/GHSA-4xp2-w642-7mcxhttps://docs.cilium.io/en/stable/security/threat-model/#kubernetes-api-server-attackerhttps://github.com/cilium/cilium/pull/28007https://github.com/cilium/cilium/security/advisories/GHSA-4xp2-w642-7mcx
2023-09-27
Published