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一、漏洞概述
10月21日,绿盟科技监测到VMware官方发布安全通告修复了一个VMware ESXi 远程代码执行漏洞(CVE-2020-3992)。漏洞来源于ESXi中使用的OpenSLP存在“use-after-free”释放后重利用问题,当攻击者在管理网络(management network)中时,可以通过访问ESXi宿主机的427端口触发OpenSLP服务的user-after-free,从而导致远程代码执行。
CVSS评分为 9.8,请相关用户采取措施进行防护。
参考链接:
https://www.vmware.com/security/advisories/VMSA-2020-0023.html
二、影响范围
受影响产品版本
- ESXi = 6.5
- ESXi = 6.7
- ESXi = 7.0
- VMware Cloud Foundation (ESXi) = 3.X
- VMware Cloud Foundation (ESXi) = 4.X
不受影响产品版本
- ESXi650-202010401-SG
- ESXi670-202010401-SG
- ESXi_7.0.1-0.0.16850804
- VMware Cloud Foundation (ESXi) = 3.10.1.1
- VMware Cloud Foundation (ESXi) = 4.1
三、漏洞防护
3.1 官方升级
目前官方已在最新版本中修复了该漏洞,请受影响的用户尽快升级版本进行防护,对应产品版本的下载链接及文档如下:
产品版本 | 下载链接 | 操作文档 |
VMware ESXi 6.5 ESXi650-202010401-SG | https://my.vmware.com/group/vmware/patch | https://docs.vmware.com/en/VMware-vSphere/6.5/rn/esxi650-202010001.html |
VMware ESXi 6.7 ESXi670-202010401-SG | https://my.vmware.com/group/vmware/patch | https://docs.vmware.com/en/VMware-vSphere/6.7/rn/esxi670-202010001.html |
VMware ESXi 7.0 ESXi_7.0.1-0.0.16850804 | https://my.vmware.com/group/vmware/patch | https://docs.vmware.com/en/VMware-vSphere/7.0/rn/vsphere-esxi-701-release-notes.html |
VMware vCloud Foundation 3.10.1.1 | https://docs.vmware.com/en/VMware-Cloud-Foundation/3.10.1/rn/VMware-Cloud-Foundation-3101-Release-Notes.html#3.10.1.1 | https://docs.vmware.com/en/VMware-Cloud-Foundation/3.10.1/rn/VMware-Cloud-Foundation-3101-Release-Notes.html#3.10.1.1 |
VMware vCloud Foundation 4.1 | https://docs.vmware.com/en/VMware-Cloud-Foundation/4.1/rn/VMware-Cloud-Foundation-41-Release-Notes.html | https://docs.vmware.com/en/VMware-Cloud-Foundation/4.1/rn/VMware-Cloud-Foundation-41-Release-Notes.html |
3.2 其它防护措施
若相关用户暂时无法进行升级操作,也可通过在VMware ESXi上禁用CIM服务器进行临时缓解,操作步骤请参考官方文档:https://kb.vmware.com/s/article/76372
注:此方法仅适用于ESXi。