CVE-2021-25735CWE-372

Validating Admission Webhook does not observe some previous fields

Medium · published September 6, 2021

CVSS v3.1
6.5
EPSS
5%
Percentile
92.6
In the wild
Unconfirmed
What it is

A security issue was discovered in kube-apiserver that could allow node updates to bypass a Validating Admission Webhook. Clusters are only affected by this vulnerability if they run a Validating Admission Webhook for Nodes that denies admission based at least partially on the old state of the Node object. Validating Admission Webhook does not observe some previous fields.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.05375 · 92.6th percentile
Weakness
CWE-372 · Incomplete Internal State Distinction
Published
2021-09-06T11:32Z
EPSS history
Timeline
  • 06 SEP 11:32Z
    Validating Admission Webhook does not observe some previous fields
    cvelistv5