Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2021-25741

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
20/09/2021
Last modified:
30/11/2021

Description

A security issue was discovered in Kubernetes where a user may be able to create a container with subpath volume mounts to access files & directories outside of the volume, including on the host filesystem.

Impact

Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N CVSS v3.1 Severity and Metrics:

Base Score: 8.10 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): None

Base Score 3.x
8.10
Severity 3.x
HIGH
Vector 2.0
AV:N/AC:L/Au:S/C:P/I:P/A:N CVSS v2.0 Severity and Metrics:

Base Score: 5.50 MEDIUM
Vector: AV:N/AC:L/Au:S/C:P/I:P/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): Single
Confidentiality (C): Physical
Integrity (I): Physical
Availability (A): None

Base Score 2.0
5.50
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:* 1.19.14 (including)
cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:* 1.20.0 (including) 1.20.10 (including)
cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:* 1.21.0 (including) 1.21.4 (including)
cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:* 1.22.0 (including) 1.22.1 (including)

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools