Privilege escalation in Microsoft Azure Kubernetes Service

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU50512

Risk: Low

CVSSv4.0: 5.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-24109

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

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

The vulnerability exists due to application does not properly impose security restrictions in Microsoft Azure Kubernetes Service, which leads to security restrictions bypass and privilege escalation.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft Azure Kubernetes Service: All versions

CPE2.3

• cpe:2.3:a:microsoft:microsoft_azure_kubernetes_service:*:*:*:*:*:*:*:*

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-24109

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

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