Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

CVE-2020-8557

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.

Published

2020-07-23T17:15:12.513

Last Modified

2024-11-21T05:39:01.667

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.5 (MEDIUM)

CVSSv2 Vector

AV:L/AC:L/Au:N/C:N/I:N/A:P

Access Vector: LOCAL
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

3.9

Impact Score

2.9

Weaknesses

Type: Secondary
CWE-400
Type: Primary
CWE-400

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	kubernetes	kubernetes	< 1.16.13	Yes
Application	kubernetes	kubernetes	< 1.17.9	Yes
Application	kubernetes	kubernetes	< 1.18.6	Yes

References

https://github.com/kubernetes/kubernetes/issues/93032 Issue Tracking, Patch, Third Party Advisory ([email protected])
https://groups.google.com/g/kubernetes-security-announce/c/cB_JUsYEKyY/m/vVSO61AhBwAJ Mailing List, Third Party Advisory ([email protected])
https://security.netapp.com/advisory/ntap-20200821-0002/ Third Party Advisory ([email protected])
https://github.com/kubernetes/kubernetes/issues/93032 Issue Tracking, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://groups.google.com/g/kubernetes-security-announce/c/cB_JUsYEKyY/m/vVSO61AhBwAJ Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.netapp.com/advisory/ntap-20200821-0002/ Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)