CVE Vulnerabilities

CVE-2021-3636

Improper Authentication

Published: Jul 30, 2021 | Modified: Nov 07, 2023
CVSS 3.x
4.6
MEDIUM
Source:
NVD
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CVSS 2.x
4.1 MEDIUM
AV:A/AC:L/Au:S/C:P/I:P/A:N
RedHat/V2
RedHat/V3
Ubuntu

It was found in OpenShift, before version 4.8, that the generated certificate for the in-cluster Service CA, incorrectly included additional certificates. The Service CA is automatically mounted into all pods, allowing them to safely connect to trusted in-cluster services that present certificates signed by the trusted Service CA. The incorrect inclusion of additional CAs in this certificate would allow an attacker that compromises any of the additional CAs to masquerade as a trusted in-cluster service.

Weakness

When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

Affected Software

Name Vendor Start Version End Version
Openshift Redhat * 4.8 (excluding)

Potential Mitigations

References