CVE-2023-41333
Cilium Kubernetes Cluster Bypass Vulnerability
Description
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.
INFO
Published Date :
Sept. 27, 2023, 3:19 p.m.
Last Modified :
Sept. 30, 2023, 2:01 a.m.
Source :
[email protected]
Remotely Exploitable :
No
Impact Score :
5.8
Exploitability Score :
1.7
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2023-41333.
| URL | Resource |
|---|---|
| https://docs.cilium.io/en/stable/security/threat-model/#kubernetes-api-server-attacker | Product |
| https://github.com/cilium/cilium/pull/28007 | Issue Tracking Patch |
| https://github.com/cilium/cilium/security/advisories/GHSA-4xp2-w642-7mcx | Mitigation Patch Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2023-41333 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-41333 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Sep. 30, 2023
Action Type Old Value New Value Added CVSS V3.1 NIST AV:A/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:H Changed Reference Type https://docs.cilium.io/en/stable/security/threat-model/#kubernetes-api-server-attacker No Types Assigned https://docs.cilium.io/en/stable/security/threat-model/#kubernetes-api-server-attacker Product Changed Reference Type https://github.com/cilium/cilium/pull/28007 No Types Assigned https://github.com/cilium/cilium/pull/28007 Issue Tracking, Patch Changed Reference Type https://github.com/cilium/cilium/security/advisories/GHSA-4xp2-w642-7mcx No Types Assigned https://github.com/cilium/cilium/security/advisories/GHSA-4xp2-w642-7mcx Mitigation, Patch, Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:* versions up to (excluding) 1.12.14 *cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:* versions from (including) 1.13.0 up to (excluding) 1.13.7 *cpe:2.3:a:cilium:cilium:*:*:*:*:*:*:*:* versions from (including) 1.14.0 up to (excluding) 1.14.2
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-41333 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2023-41333
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.04 }} -0.00%
score
0.05089
percentile