Vulnerability · Published Oct 31, 2023 · Assigned by kubernetes
CVE-2023-3676Kubernetes - Windows nodes - Insufficient input sanitization leads to privilege escalation
High 8.8
In plain English
A high-severity improper input validation in kubelet from Kubernetes. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 13.2% (higher than 96% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)13.2%top 3.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A security issue was discovered in Kubernetes where a user that can create pods on Windows nodes may be able to escalate to admin privileges on those nodes. Kubernetes clusters are only affected if they include Windows nodes.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | kubernetes | 1.20.5+really1.20.2-1 | DEBIAN-CVE-2023-3676 |
| Debian:13 | kubernetes | 1.20.5+really1.20.2-1 | DEBIAN-CVE-2023-3676 |
| Debian:14 | kubernetes | 1.20.5+really1.20.2-1 | DEBIAN-CVE-2023-3676 |
| Go | k8s.io/kubernetes | 1.25.13 | GHSA-7fxm-f474-hf8w |
| Go | k8s.io/kubernetes | 1.24.17 | GHSA-7fxm-f474-hf8w |
| Go | k8s.io/kubernetes | 1.24.17, 1.25.13, 1.26.8, 1.27.5, 1.28.1 | GO-2023-2330 |
| Go | k8s.io/kubernetes | 1.28.1 | GHSA-7fxm-f474-hf8w |
| Go | k8s.io/kubernetes | 1.27.5 | GHSA-7fxm-f474-hf8w |
| Go | k8s.io/kubernetes | 1.26.8 | GHSA-7fxm-f474-hf8w |
| Ubuntu:22.04:LTS | kubernetes | no fix listed | UBUNTU-CVE-2023-3676 |
| Ubuntu:24.04:LTS | kubernetes | no fix listed | UBUNTU-CVE-2023-3676 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Kubernetes | kubelet | v1.28.0v1.27.0 – through v1.27.4v1.26.0 – through v1.26.7v1.25.0 – through v1.25.12 |
Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H