CVE-2023-27593

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Source
https://cve.org/CVERecord?id=CVE-2023-27593
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-27593.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2023-27593
Aliases
Related
Published
2023-03-17T19:51:16.689Z
Modified
2026-04-12T04:24:15.443021Z
Severity
  • 4.4 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
cilium-agent container can access the host via `hostPath` mount
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-276"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/27xxx/CVE-2023-27593.json"
}
References

Affected packages

Git / github.com/cilium/cilium

Affected ranges

Type
GIT
Repo
https://github.com/cilium/cilium
Events
Introduced
c9723a8df3cfa336da1f8457a864105d8349acfe
Fixed
a6be57eb805dd60c6516c2fe22cddbe1e09c3812

Affected versions

1.*
1.13.0
v1.*
v1.13.0

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-27593.json"