Vulnerability Details : CVE-2020-8567

Kubernetes Secrets Store CSI Driver Vault Plugin prior to v0.0.6, Azure Plugin prior to v0.0.10, and GCP Plugin prior to v0.2.0 allow an attacker who can create specially-crafted SecretProviderClass objects to write to arbitrary file paths on the host filesystem, including /var/lib/kubelet/pods.

Vulnerability category: Directory traversal

Published 2021-01-21 17:15:14

Updated 2021-08-27 16:07:41

Source Kubernetes

View at NVD, CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2020-8567

Probability of exploitation activity in the next 30 days: 0.05%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 17 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2020-8567

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Source
4.0	MEDIUM	AV:N/AC:L/Au:S/C:N/I:P/A:N	8.0	2.9	[email protected]
Access Vector: Network Access Complexity: Low Authentication: Single Confidentiality Impact: None Integrity Impact: Partial Availability Impact: None
4.9	MEDIUM	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:L	1.8	2.7	[email protected]
Attack Vector: Network Attack Complexity: High Privileges Required: Low User Interaction: None Scope: Changed Confidentiality: None Integrity: Low Availability: Low
6.5	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N	2.8	3.6	[email protected]
Attack Vector: Network Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: None Integrity: High Availability: None

CWE ids for CVE-2020-8567

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

Assigned by: [email protected] (Primary)
CWE-24 Path Traversal: '../filedir'

The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize "../" sequences that can resolve to a location that is outside of that directory.

Assigned by: [email protected] (Secondary)

References for CVE-2020-8567

https://github.com/kubernetes-sigs/secrets-store-csi-driver/issues/384

Patch;Third Party Advisory
https://groups.google.com/g/kubernetes-secrets-store-csi-driver/c/BI2qisiNXHY

Mailing List;Third Party Advisory

Products affected by CVE-2020-8567

Microsoft » Azure Key Vault Provider For Secrets Store Csi Driver » For Kubernetes
Versions before (<) 0.0.10
cpe:2.3:a:microsoft:azure_key_vault_provider_for_secrets_store_csi_driver:*:*:*:*:*:kubernetes:*:*
Matching versions
Google » Secret Manager Provider For Secret Store Csi Driver » For Kubernetes
Versions before (<) 0.2.0
cpe:2.3:a:google:secret_manager_provider_for_secret_store_csi_driver:*:*:*:*:*:kubernetes:*:*
Matching versions
Hashicorp » Vault Provider For Secrets Store Csi Driver » For Kubernetes
Versions before (<) 0.0.6
cpe:2.3:a:hashicorp:vault_provider_for_secrets_store_csi_driver:*:*:*:*:*:kubernetes:*:*
Matching versions