CVE-2021-25737 - CVE House
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Status published Low CVE-2021-25737

Holes in EndpointSlice Validation Enable Host Network Hijack

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • John Howard

References

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Affected Vendor

Affected Software

Kubernetes
Vulnerable Versions:
unspecified

Timeline

Official Publish: September 6th, 2021
Last Modified: September 16th, 2024
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N

Weaknesses (CWE)

CWE-184

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.