Vulnerability Details : CVE-2021-25737

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.
Published 2021-09-06 12:15:08
Updated 2021-10-07 17:55:09
Source Kubernetes
View at NVD,   CVE.org
Vulnerability category: Open redirect

Products affected by CVE-2021-25737

Exploit prediction scoring system (EPSS) score for CVE-2021-25737

EPSS FAQ
0.06%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 24 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-25737

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
4.9
 MEDIUM AV:N/AC:M/Au:S/C:P/I:P/A:N
6.8
4.9
 NIST
2.7
 LOW CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
1.2
1.4
 Kubernetes
4.8
 MEDIUM CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
1.7
2.7
 NIST

CWE ids for CVE-2021-25737

  • The product implements a protection mechanism that relies on a list of inputs (or properties of inputs) that are not allowed by policy or otherwise require other action to neutralize before additional processing takes place, but the list is incomplete.
    Assigned by: jordan@liggitt.net (Secondary)
  • The web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-25737

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