The Birthday attack against 64-bit block ciphers flaw (CVE-2016-2183) was reported for the health checks port (9979) on etcd grpc-proxy component. Even though the CVE-2016-2183 has been fixed in the etcd components, to enable periodic health checks from kubelet, it was necessary to open up a new port (9979) on etcd grpc-proxy, hence this port might be considered as still vulnerable to the same type of vulnerability. The health checks on etcd grpc-proxy do not contain sensitive data (only metrics data), therefore the potential impact related to this vulnerability is minimal. The CVE-2023-0296 has been assigned to this issue to track the permanent fix in the etcd component.
This issue has been addressed in the following products: Red Hat OpenShift Container Platform 4.12 Via RHSA-2022:7399 https://access.redhat.com/errata/RHSA-2022:7399
This issue has been addressed in the following products: Red Hat OpenShift Container Platform 4.11 Via RHSA-2023:0069 https://access.redhat.com/errata/RHSA-2023:0069
This issue has been addressed in the following products: Red Hat OpenShift Container Platform 4.10 Via RHSA-2023:0241 https://access.redhat.com/errata/RHSA-2023:0241
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2023-0296
This issue has been addressed in the following products: Red Hat OpenShift Container Platform 4.9 Via RHSA-2023:0574 https://access.redhat.com/errata/RHSA-2023:0574