kubernetes container_storage_interface_snapshotter 空指针解引用

CVE编号

CVE-2020-8569

利用情况

暂无

补丁情况

N/A

披露时间

2021-01-22

漏洞描述

Kubernetes CSI snapshot-controller prior to v2.1.3 and v3.0.2 could panic when processing a VolumeSnapshot custom resource when: - The VolumeSnapshot referenced a non-existing PersistentVolumeClaim and the VolumeSnapshot did not reference any VolumeSnapshotClass. - The snapshot-controller crashes, is automatically restarted by Kubernetes, and processes the same VolumeSnapshot custom resource after the restart, entering an endless crashloop. Only the volume snapshot feature is affected by this vulnerability. When exploited, users can’t take snapshots of their volumes or delete the snapshots. All other Kubernetes functionality is not affected.

解决建议

建议您更新当前系统或软件至最新版，完成漏洞的修复。

参考链接
https://github.com/kubernetes-csi/external-snapshotter/issues/380
https://groups.google.com/g/kubernetes-security-announce/c/1EzCr1qUxxU

受影响软件情况

#	类型	厂商	产品	版本	影响面
1
	运行在以下环境
	应用	kubernetes	container_storage_interface_snapshotter	*	From (including) 2.1.0	Up to (excluding) 2.1.3
	运行在以下环境
	应用	kubernetes	container_storage_interface_snapshotter	*	From (including) 3.0.0	Up to (excluding) 3.0.2

CVSS3评分 6.5

• 攻击路径 网络
• 攻击复杂度 低
• 权限要求 低
• 影响范围 未更改
• 用户交互 无
• 可用性 高
• 保密性 无
• 完整性 无

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CWE-ID 漏洞类型 CWE-476 空指针解引用