CVE-2023-27593

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Prior to versions 1.11.15, 1.12.8, and 1.13.1, an attacker with access to a Cilium agent pod can write to `/opt/cni/bin` due to a `hostPath` mount of that directory in the agent pod. By replacing the CNI binary with their own malicious binary and waiting for the creation of a new pod on the node, the attacker can gain access to the underlying node. The issue has been fixed and the fix is available on versions 1.11.15, 1.12.8, and 1.13.1. Some workarounds are available. Kubernetes RBAC should be used to deny users and service accounts `exec` access to Cilium agent pods. In cases where a user requires `exec` access to Cilium agent pods, but should not have access to the underlying node, no workaround is possible.

• CWE-276

• https://github.com/cilium/cilium/pull/24075Third Party Advisory
• https://github.com/cilium/cilium/releases/tag/v1.11.15Third Party Advisory
• https://github.com/cilium/cilium/releases/tag/v1.12.8Third Party Advisory
• https://github.com/cilium/cilium/releases/tag/v1.13.1Third Party Advisory
• https://github.com/cilium/cilium/security/advisories/GHSA-4hc4-pgfx-3mrxThird Party Advisory
• https://kubernetes.io/docs/reference/access-authn-authz/rbac/Third Party Advisory
• https://github.com/cilium/cilium/pull/24075Third Party Advisory
• https://github.com/cilium/cilium/releases/tag/v1.11.15Third Party Advisory
• https://github.com/cilium/cilium/releases/tag/v1.12.8Third Party Advisory
• https://github.com/cilium/cilium/releases/tag/v1.13.1Third Party Advisory
• https://github.com/cilium/cilium/security/advisories/GHSA-4hc4-pgfx-3mrxThird Party Advisory
• https://kubernetes.io/docs/reference/access-authn-authz/rbac/Third Party Advisory

Published

Mar 17, 2023

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2023-27588Hasura is an open-source product that provides users GraphQL…7.5
• CVE-2023-27589Minio is a Multi-Cloud Object Storage framework. Starting wi…6.5
• CVE-2023-2759A hidden API exists in TapHome's core platform before versio…8.8
• CVE-2023-27590Rizin is a UNIX-like reverse engineering framework and comma…7.8
• CVE-2023-27591Miniflux is a feed reader. Prior to version 2.0.43, an unaut…7.5
• CVE-2023-27592Miniflux is a feed reader. Since v2.0.25, Miniflux will auto…5.4
• CVE-2023-27594Cilium is a networking, observability, and security solution…7.3
• CVE-2023-27595Cilium is a networking, observability, and security solution…9.8
• CVE-2023-27596OpenSIPS is a Session Initiation Protocol (SIP) server imple…7.5
• CVE-2023-27597OpenSIPS is a Session Initiation Protocol (SIP) server imple…7.5
• CVE-2023-27598OpenSIPS is a Session Initiation Protocol (SIP) server imple…7.5
• CVE-2023-27599OpenSIPS is a Session Initiation Protocol (SIP) server imple…7.5