CVE-2020-8557
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- CVE-2020-8557
CVE Details
| Release Date: | 2020-07-23 |
Description
The Kubernetes kubelet component in versions 1.1-1.16.12, 1.17.0-1.17.8 and 1.18.0-1.18.5 do not account for disk usage by a pod which writes to its own /etc/hosts file. The /etc/hosts file mounted in a pod by kubelet is not included by the kubelet eviction manager when calculating ephemeral storage usage by a pod. If a pod writes a large amount of data to the /etc/hosts file, it could fill the storage space of the node and cause the node to fail.
See more information about CVE-2020-8557 from MITRE CVE dictionary and NIST NVD
CVSS v3.0 metrics
NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.
| Base Score: | 5.5 | Base Metrics: | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| Access Vector: | Local network | Attack Complexity: | Low |
| Privileges Required: | Low | User Interaction: | None |
| Scope: | Unchanged | Confidentiality Impact: | None |
| Integrity Impact: | None | Availability Impact: | High |
Errata information
| Platform | Errata | Release Date |
| Oracle Linux version 7 (istio) | ELSA-2020-5765 | 2020-07-22 |
| Oracle Linux version 7 (kata) | ELSA-2020-5765 | 2020-07-22 |
| Oracle Linux version 7 (kata) | ELSA-2020-5766 | 2020-07-22 |
| Oracle Linux version 7 (kata-image) | ELSA-2020-5765 | 2020-07-22 |
| Oracle Linux version 7 (kata-image) | ELSA-2020-5766 | 2020-07-22 |
| Oracle Linux version 7 (kata-runtime) | ELSA-2020-5765 | 2020-07-22 |
| Oracle Linux version 7 (kata-runtime) | ELSA-2020-5766 | 2020-07-22 |
| Oracle Linux version 7 (kernel-uek-container) | ELSA-2020-5765 | 2020-07-22 |
| Oracle Linux version 7 (kernel-uek-container) | ELSA-2020-5766 | 2020-07-22 |
| Oracle Linux version 7 (kubernetes) | ELSA-2020-5765 | 2020-07-22 |
| Oracle Linux version 7 (kubernetes) | ELSA-2020-5766 | 2020-07-22 |
| Oracle Linux version 7 (kubernetes) | ELSA-2020-5767 | 2020-07-22 |
| Oracle Linux version 7 (olcne) | ELSA-2020-5765 | 2020-07-22 |
| Oracle Linux version 7 (olcne) | ELSA-2020-5766 | 2020-07-22 |
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