Kubernetes CSIProxy Windows Node Privilege Escalation via Pod Creation
CVE-2023-3893 Published on November 3, 2023
Kubernetes - csi-proxy - Insufficient input sanitization leads to privilege escalation
A security issue was discovered in Kubernetes where a user that can
create pods on Windows nodes running kubernetes-csi-proxy may be able to
escalate to admin privileges on those nodes. Kubernetes clusters are
only affected if they include Windows nodes running
kubernetes-csi-proxy.
Vulnerability Analysis
CVE-2023-3893 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
Products Associated with CVE-2023-3893
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Affected Versions
Kubernetes csi-proxy:- Version v2.0.0-alpha.0 is affected.
- Before and including v1.1.2 is affected.
- Version v2.0.0-alpha.1 is unaffected.
- Version v1.1.3 is unaffected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.