CVE-2020-8554

medium
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

Kubernetes API server in all versions allow an attacker who is able to create a ClusterIP service and set the spec.externalIPs field, to intercept traffic to that IP address. Additionally, an attacker who is able to patch the status (which is considered a privileged operation and should not typically be granted to users) of a LoadBalancer service can set the status.loadBalancer.ingress.ip to similar effect.

References

https://github.com/kubernetes/kubernetes/issues/97076

https://groups.google.com/g/kubernetes-security-announce/c/iZWsF9nbKE8

https://lists.apache.org/thread.html/[email protected]%3Ccommits.druid.apache.org%3E

https://lists.apache.org/thread.html/[email protected]%3Ccommits.druid.apache.org%3E

https://lists.apache.org/thread.html/[email protected]%3Ccommits.druid.apache.org%3E

https://lists.apache.org/thread.html/[email protected]%3Ccommits.druid.apache.org%3E

Details

Source: MITRE

Published: 2021-01-21

Updated: 2021-07-20

Type: CWE-863

Risk Information

CVSS v2

Base Score: 6

Vector: AV:N/AC:M/Au:S/C:P/I:P/A:P

Impact Score: 6.4

Exploitability Score: 6.8

Severity: MEDIUM

CVSS v3

Base Score: 5

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L

Impact Score: 3.4

Exploitability Score: 1.6

Severity: MEDIUM

Vulnerable Software

Configuration 1

OR

cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*

Tenable Plugins

View all (3 total)

IDNameProductFamilySeverity
146377Oracle Linux 7 : olcne (ELSA-2021-9029)NessusOracle Linux Local Security Checks
medium
146376Oracle Linux 7 / 8 : olcne (ELSA-2021-9028)NessusOracle Linux Local Security Checks
medium
145229RHEL 7 : OpenShift Container Platform 3.11.374 bug fix and (RHSA-2021:0079)NessusRed Hat Local Security Checks
medium