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Kubernetes: CVE-2021-25737: Holes in EndpointSlice Validation Enable Host Network Hijack

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Kubernetes: CVE-2021-25737: Holes in EndpointSlice Validation Enable Host Network Hijack

Severity
5
CVSS
(AV:N/AC:M/Au:S/C:P/I:P/A:N)
Published
09/06/2021
Created
03/11/2022
Added
03/10/2022
Modified
11/19/2024

Description

A security issue was discovered in Kubernetes where a user may be able to redirect pod traffic to private networks on a Node. Kubernetes already prevents creation of Endpoint IPs in the localhost or link-local range, but the same validation was not performed on EndpointSlice IPs.

Solution(s)

  • kubernetes-upgrade-1_18_19
  • kubernetes-upgrade-1_19_10
  • kubernetes-upgrade-1_20_7

References

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