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CVE-2021-25737

LOW
Published 2021-09-06T11:32:01.989085Z
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CVSS Score

V3.1
2.7
/10
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.005
probability
of exploitation in the wild

There is a 0.5% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.667
Higher than 66.7% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED

Impact Metrics

Confidentiality
LOW
Integrity
NONE
Availability
NONE

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.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

Kubernetes

Kubernetes

Affected Versions:

unspecified unspecified unspecified unspecified

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

✓ GitHub Reviewed MODERATE

Incomplete List of Disallowed Inputs in Kubernetes

GHSA-mfv7-gq43-w965

Advisory Details

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 Packages

Go k8s.io/kubernetes
ECOSYSTEM: ≥1.16.0 <1.18.19
Go k8s.io/kubernetes
ECOSYSTEM: ≥1.19.0 <1.19.11
Go k8s.io/kubernetes
ECOSYSTEM: ≥1.20.0 <1.20.7
Go k8s.io/kubernetes
ECOSYSTEM: ≥1.21.0 <1.21.1

CVSS Scoring

CVSS Score

5.0

CVSS Vector

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

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2021-25737
WEB https://github.com/kubernetes/kubernetes/issues/102106
PACKAGE https://github.com/kubernetes/kubernetes
WEB https://groups.google.com/g/kubernetes-security-announce/c/xAiN3924thY
WEB https://security.netapp.com/advisory/ntap-20211004-0004

Advisory provided by GitHub Security Advisory Database. Published: September 7, 2021, Modified: September 14, 2021

References

https://groups.google.com/g/kubernetes-security-announce/c/xAiN3924thY
https://github.com/kubernetes/kubernetes/issues/102106
https://security.netapp.com/advisory/ntap-20211004-0004/
Published: 2021-09-06T11:32:01.989085Z
Last Modified: 2024-09-16T21:04:34.209Z
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