Seccomp bypass via empty localhost profile
Published Jun 16, 2023 · Updated Feb 13, 2025
Seccomp enforcement bypass in Kubernetes Kubelet allows local users to run affected pods with seccomp disabled through an empty profile. Kubelet accepts a Localhost seccomp type with an empty localhostProfile and passes an empty CRI profile path, which the runtime treats as unconfined. Exploitation requires permission to create a pod using that malformed security context and removes syscall filtering from the resulting workload.
Summary
What happened
Seccomp enforcement bypass in Kubernetes Kubelet allows local users to run affected pods with seccomp disabled through an empty profile. Kubelet accepts a Localhost seccomp type with an empty localhostProfile and passes an empty CRI profile path, which the runtime treats as unconfined. Exploitation requires permission to create a pod using that malformed security context and removes syscall filtering from the resulting workload.
The record
- CVE
- CVE-2023-2431
- Published
- Jun 16, 2023
- Updated
- Feb 13, 2025
- Vendor
- Kubernetes
- Product
- Kubernetes
- Classifications
- CWE-1287, T1562
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Jun 16, 2023CVE publishedPublication date reported by the CVE source.
- Feb 13, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <v1.24.14
- Affected versionversion=v1.25.0 <v1.25.9
- Affected versionversion=v1.26.0 <v1.26.4
- Affected versionversion=v1.27.0 <v1.27.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Empty Localhost seccomp profile reproductionproof of concept · unverified
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
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