CVE-2021-25735

一、漏洞信息
 漏洞编号：[CVE-2021-25735](https://nvd.nist.gov/vuln/detail/CVE-2021-25735)
 漏洞归属组件：[kubernetes](https://gitee.com/src-openeuler/kubernetes)
 漏洞归属的版本：1.18.6,1.20.2
 CVSS V3.0分值：
  BaseScore：6.5 Medium
  Vector：CVSS：3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
 漏洞简述：
  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.
 漏洞公开时间：2021-09-06 20:15
 漏洞创建时间：2021-09-14 03:10:13
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2021-25735
<details>
<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |
| ------- | -------- | -------- |
| groups | https://groups.google.com/g/kubernetes-security-announce/c/FKAGqT4jx9Y |  |
| github |  https://github.com/kubernetes/kubernetes/issues/100096 |  |

</details>

漏洞分析指导链接：
  https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md
 漏洞数据来源:
  其它
 漏洞补丁信息：
  <details>
<summary>详情(点击展开)</summary>

无
</details>

二、漏洞分析结构反馈
 影响性分析说明：
    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. 
 openEuler评分：
  6.5
 Vector：CVSS：3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
 受影响版本排查(受影响/不受影响)：
  1.openEuler-20.03-LTS-SP1(1.20.2):受影响
2.openEuler-20.03-LTS-SP2(1.20.2):受影响

修复是否涉及abi变化(是/否)：
  1.openEuler-20.03-LTS-SP1(1.20.2):否
2.openEuler-20.03-LTS-SP2(1.20.2):否

三、漏洞修复
安全公告链接：https://www.openeuler.org/zh/security/safety-bulletin/detail/?id=openEuler-SA-2021-1373

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