CVE-2020-8557
CVSS V2 Low 2.1
CVSS V3 Medium 5.5
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.
Overview
- CVE ID
- CVE-2020-8557
- Assigner
- jordan@liggitt.net
- Vulnerability Status
- Analyzed
- Published Version
- 2020-07-23T17:15:12
- Last Modified Date
- 2023-01-27T20:35:47
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:* | 1 | OR | 1.16.13 | |
| cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:* | 1 | OR | 1.17.0 | 1.17.9 |
| cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:* | 1 | OR | 1.18.0 | 1.18.6 |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:L/AC:L/Au:N/C:N/I:N/A:P
- Access Vector
- LOCAL
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- NONE
- Availability Impact
- PARTIAL
- Base Score
- 2.1
- Severity
- LOW
- Exploitability Score
- 3.9
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Attack Vector
- LOCAL
- Attack Compatibility
- LOW
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- HIGH
- Base Score
- 5.5
- Base Severity
- MEDIUM
- Exploitability Score
- 1.8
- Impact Score
- 3.6
References
| Reference URL | Reference Tags |
|---|---|
| https://github.com/kubernetes/kubernetes/issues/93032 | Patch Third Party Advisory |
| https://groups.google.com/g/kubernetes-security-announce/c/cB_JUsYEKyY/m/vVSO61AhBwAJ | Mailing List Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20200821-0002/ |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2020-8557 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-8557 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 17:19:19 | Added to TrackCVE | |||
| 2022-12-04 20:11:49 | security@kubernetes.io | jordan@liggitt.net | CVE Assigner | updated |
| 2022-12-04 20:11:49 | 2020-07-23T17:15Z | 2020-07-23T17:15:12 | CVE Published Date | updated |
| 2022-12-04 20:11:49 | 2020-08-21T10:15:11 | CVE Modified Date | updated | |
| 2022-12-04 20:11:49 | Undergoing Analysis | Vulnerability Status | updated | |
| 2023-01-27 23:10:32 | 2023-01-27T20:35:47 | CVE Modified Date | updated | |
| 2023-01-27 23:10:32 | Undergoing Analysis | Analyzed | Vulnerability Status | updated |