CVEvulnerability

CVE-2021-25737

4.8 MEDIUM Published 2021-09-06 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2021-09-06
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
2.7 LOW — CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
CVSS 3.1 ([email protected])
4.8 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
CVSS 2.0 ([email protected])
4.9 MEDIUM — AV:N/AC:M/Au:S/C:P/I:P/A:N
Weaknesses
CWE-184, CWE-601

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.

Affected configurations

• kubernetes kubernetes (>= 1.16.0 < 1.18.19) • kubernetes kubernetes (>= 1.19.0 < 1.19.10) • kubernetes kubernetes (>= 1.20.0 < 1.20.7) • kubernetes kubernetes 1.21.0

Related

Weakness · CWE (2)

  • CWE-184 Incomplete List of Disallowed Inputs weakness
  • CWE-601 URL Redirection to Untrusted Site weakness

References