#VU71640 Permissions, Privileges, and Access Controls in Kubelet - CVE-2021-25749

Vulnerability identifier: #VU71640

Vulnerability risk: Low

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-25749

CWE-ID: CWE-264

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Kubelet
Web applications / Modules and components for CMS

Vendor: Kubernetes

Description

The vulnerability allows a remote user to escalate privileges on the system.

The vulnerability exists due incorrect privilege management. Windows workloads can be executed with the ContainerAdministrator privileges even when the runAsNonRoot option is set to "true".

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Kubelet: before 1.22.14, 1.23.5, 1.23.11, 1.25.0, 1.22.14

---

External links
https://bugzilla.redhat.com/show_bug.cgi?id=2127808

---

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.