Vulnerability · Published Nov 3, 2023 · Assigned by kubernetes
CVE-2023-3893Kubernetes - csi-proxy - Insufficient input sanitization leads to privilege escalation
High 8.8
In plain English
A high-severity improper input validation in csi-proxy from Kubernetes. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.5% (higher than 85% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)2.5%top 15.4% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | kubernetes | 1.20.5+really1.20.2-1 | DEBIAN-CVE-2023-3893 |
| Debian:13 | kubernetes | 1.20.5+really1.20.2-1 | DEBIAN-CVE-2023-3893 |
| Debian:14 | kubernetes | 1.20.5+really1.20.2-1 | DEBIAN-CVE-2023-3893 |
| Go | github.com/kubernetes-csi/csi-proxy | 1.1.3 | GHSA-r6cc-7wj7-gfx2 |
| Go | github.com/kubernetes-csi/csi-proxy | 1.1.3-0.20230821192013-2523e6674ded | GHSA-r6cc-7wj7-gfx2 |
| Go | github.com/kubernetes-csi/csi-proxy | 0.0.0-20230821192013-2523e6674ded | GHSA-r6cc-7wj7-gfx2 |
| Go | github.com/kubernetes-csi/csi-proxy | 1.1.3 | GO-2023-2176 |
| Go | github.com/kubernetes-csi/csi-proxy/v2 | 2.0.0-alpha.1 | GHSA-r6cc-7wj7-gfx2 |
| Go | github.com/kubernetes-csi/csi-proxy/v2 | 2.0.0-alpha.1 | GO-2023-2176 |
| Ubuntu:22.04:LTS | kubernetes | no fix listed | UBUNTU-CVE-2023-3893 |
| Ubuntu:24.04:LTS | kubernetes | no fix listed | UBUNTU-CVE-2023-3893 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Kubernetes | csi-proxy | v2.0.0-alpha.00 – through v1.1.2 |
Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H