CVE-2020-8557

Aliases:GHSA-55qj-gj3x-jq9rGO-2024-2753
Advisory lineage Upstream: 0 Downstream: 8
Modified
Published: 23 Jul 2020, 16:59
Last modified:17 Sept 2024, 03:14

Vulnerability Summary

Overall Risk (default)
low
22/100
CVSS Score
5.5 MEDIUM
v3.1 (cve.org)
EPSS Score
0.11% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

23 Jul 2020, 16:59
Published
Vulnerability first disclosed
17 Sept 2024, 03:14
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  • v2.0•LOW•Score: 2.1AV:L/AC:L/Au:N/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 0.11%• Percentile: 29%

Techniques & Countermeasures

  • CWE-400•Uncontrolled Resource Consumption

    The product does not properly control the allocation and maintenance of a limited resource.

Affected Systems

  • k8s.io•kubernetes

    ≥ 1.18.0, < 1.18.6

  • k8s.io/kubernetes/pkg•kubelet

    ≥ 1.1.0, < 1.16.13 | ≥ 1.17.0, < 1.17.9 | ≥ 1.18.0, < 1.18.6

  • kubernetes•kubernetes

    < 1.16.13 | ≥ 1.17.0, < 1.17.9 | ≥ 1.18.0, < 1.18.6 | 1.15 | 1.14 | 1.13 | 1.12 | 1.11 | 1.10 | 1.9 | 1.8 | 1.7 | 1.6 | 1.5 | 1.4 | 1.3 | 1.2 | 1.1 | ≥ 1.18, < 1.18.6 | ≥ 1.17, < 1.17.9 | ≥ 1.16, < 1.16.13

References (12)