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CVE-2023-41332— Denial of service via Kubernetes annotations in specific Cilium configurations

Quick assessment

Affected
cilium cilium
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cilium是一个开源软件。用于提供和透明地保护应用程序工作负载（如应用程序容器或进程）之间的网络连接和负载平衡。 Cilium存在安全漏洞，该漏洞源于允许攻击者通过特定配置中的Kubernetes注释进行拒绝服务（DoS）攻击。受影响的产品和版本：Cilium 1.14.1及之前版本，1.12.13及之前版本，1.13.6及之前版本。

CVSS 3.5 · Low EPSS 0.51% · P42
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I. Basic Information for CVE-2023-41332

Vulnerability Information
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Vulnerability Title
Denial of service via Kubernetes annotations in specific Cilium configurations
Source: CVE Program / CVE List V5
Vulnerability Description
Cilium is a networking, observability, and security solution with an eBPF-based dataplane. In Cilium clusters where Cilium's Layer 7 proxy has been disabled, creating workloads with `policy.cilium.io/proxy-visibility` annotations (in Cilium >= v1.13) or `io.cilium.proxy-visibility` annotations (in Cilium <= v1.12) causes the Cilium agent to segfault on the node to which the workload is assigned. Existing traffic on the affected node will continue to flow, but the Cilium agent on the node will not able to process changes to workloads running on the node. This will also prevent workloads from being able to start on the affected node. The denial of service will be limited to the node on which the workload is scheduled, however an attacker may be able to schedule workloads on the node of their choosing, which could lead to targeted attacks. This issue has been resolved in Cilium versions 1.14.2, 1.13.7, and 1.12.14. Users unable to upgrade can avoid this denial of service attack by enabling the Layer 7 proxy.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
对异常条件的处理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Cilium 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cilium是一个开源软件。用于提供和透明地保护应用程序工作负载（如应用程序容器或进程）之间的网络连接和负载平衡。 Cilium存在安全漏洞，该漏洞源于允许攻击者通过特定配置中的Kubernetes注释进行拒绝服务（DoS）攻击。受影响的产品和版本：Cilium 1.14.1及之前版本，1.12.13及之前版本，1.13.6及之前版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
cilium cilium >= 1.14.0, < 1.14.2 -

II. Public POCs for CVE-2023-41332

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III. Intelligence Information for CVE-2023-41332

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Patches & Fixes for CVE-2023-41332 (1)

Vendor Advisories for CVE-2023-41332 (1)

Same Patch Batch · cilium · 2023-09-26 · 3 CVEs total

CVE-2023-39347 7.6 HIGH Cilium NetworkPolicy bypass via pod labels
CVE-2023-41333 6.9 MEDIUM Bypass of namespace restrictions in CiliumNetworkPolicy

IV. Related Vulnerabilities

Same product: cilium
Same vendor: cilium
Same weakness: CWE-755

V. Comments for CVE-2023-41332

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