Vulnerability CVE-2021-25737


Published: 2021-09-06

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.

Type:

CWE-601

(URL Redirection to Untrusted Site ('Open Redirect'))

CVSS2 => (AV:N/AC:M/Au:S/C:P/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
4.9/10
4.9/10
6.8/10
Exploit range
Attack complexity
Authentication
Remote
Medium
Single time
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
None
Affected software
Kubernetes -> Kubernetes 

 References:
https://github.com/kubernetes/kubernetes/issues/102106
https://groups.google.com/g/kubernetes-security-announce/c/xAiN3924thY

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