CVE-2023-27593 — Cilium is a networking, observability, and security solution with an eBPF-based
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 rep
Published
2023-03-17T19:51:16.689Z
Last modified
2025-02-25T14:53:40.623Z
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
01What is this vulnerability?
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…
02Affected products
| Vendor | Product | Versions |
|---|
| cilium | cilium | < 1.11.15, >= 1.12.0, < 1.12.8, >= 1.13.0, < 1.13.1 |
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2023-03-17T19:51:16.689Z
- Last modified: 2025-02-25T14:53:40.623Z
09References
- github.com — https://github.com/cilium/cilium/security/advisories/GHSA-4hc4-pgfx-3mrx
- github.com — https://github.com/cilium/cilium/pull/24075
- github.com — https://github.com/cilium/cilium/releases/tag/v1.11.15
- github.com — https://github.com/cilium/cilium/releases/tag/v1.12.8
- github.com — https://github.com/cilium/cilium/releases/tag/v1.13.1
- kubernetes.io — https://kubernetes.io/docs/reference/access-authn-authz/rbac/
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