// For flags

CVE-2021-25749

runAsNonRoot logic bypass for Windows containers

Severity Score

7.8
*CVSS v3.1

Exploit Likelihood

< 1%
*EPSS

Affected Versions

4
*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track*
*SSVC
Descriptions

Windows workloads can run as ContainerAdministrator even when those workloads set the runAsNonRoot option to true.

A flaw was found in Kubernetes. This issue allows Windows workloads to run as a ContainerAdministrator even when the workloads set the runAsNonRoot option to true.

Red Hat OpenShift support for Windows Containers allows you to deploy Windows container workloads running on Windows Server containers. Issues addressed include bypass and denial of service vulnerabilities.

*Credits: Mark Rosetti (@marosset) of Microsoft
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Adjacent
Attack Complexity
High
Privileges Required
High
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low
Attack Vector
Local
Attack Complexity
Low
Authentication
Single
Confidentiality
Complete
Integrity
Complete
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:Track*
Exploitation
None
Automatable
No
Tech. Impact
Total
* Organization's Worst-case Scenario
Timeline
  • 2021-01-21 CVE Reserved
  • 2023-01-30 CVE Published
  • 2025-01-16 CVE Updated
  • 2025-03-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-284: Improper Access Control
  • CWE-842: Placement of User into Incorrect Group
CAPEC
Affected Vendors, Products, and Versions (4)