VMWARE多个高危漏洞通告

王哥哥 ESXi 6.7 3,356 次浏览 没有评论

转自:VMware多个高危漏洞通告 – 绿盟科技技术博客 (nsfocus.net)

一、漏洞概述

2021223日,VMware官方发布安全通告,披露了vSphere ClientESXi的两个高危漏洞。

CVE-2021-21972vSphere ClientHTML5)在vCenter Server插件vRealize Operations中包含一个远程执行代码漏洞,CVSSv3评分9.8。受影响的vRealize Operations插件为默认安装。

CVE-2021-21974ESXi中使用的OpenSLP存在堆溢出漏洞,CVSSv3评分8.8。与ESXi处于同一网段中且可以访问427端口的攻击者可触发OpenSLP服务中的堆溢出问题,从而导致远程执行代码。

参考链接:https://www.vmware.com/security/advisories/VMSA-2021-0002.html

二、影响范围

CVE-2021-21972

受影响版本

  • vCenter Server 7.0 < 7.0 U1c
  • vCenter Server 6.7 < 6.7 U3l
  • vCenter Server 6.5 < 6.5 U3n
  • Cloud Foundation (vCenter Server) 4.X < 4.2
  • Cloud Foundation (vCenter Server) 3.X < 3.10.1.2

不受影响版本

  • vCenter Server 7.0 U1c
  • vCenter Server 6.7 U3l
  • vCenter Server 6.5 U3n
  • Cloud Foundation (vCenter Server) 4.2
  • Cloud Foundation (vCenter Server) 3.10.1.2

CVE-2021-21974

受影响版本

  • ESXi 7.0 < 70U1c-17325551
  • ESXi 6.7 < 670-202102401-SG
  • ESXi 6.5 < 650-202102101-SG
  • Cloud Foundation (ESXi) 4.X <4.2
  • Cloud Foundation (ESXi) 3.X

不受影响版本

  • ESXi 70U1c-17325551
  • ESXi 670-202102401-SG
  • ESXi 650-202102101-SG
  • Cloud Foundation (ESXi) 4.2
  • Cloud Foundation (ESXi) 3.X 热补丁KB82705

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 7.0 ESXi70U1c-17325551

https://my.vmware.com/group/vmware/patch

https://docs.vmware.com/en/VMware-vSphere/7.0/rn/vsphere-esxi-70u1c.html

VMware ESXi 6.7 ESXi670-202102401-SG

https://docs.vmware.com/en/VMware-vSphere/6.7/rn/esxi670-202102001.html

  

VMware ESXi 6.5 ESXi650-202102101-SG

https://docs.vmware.com/en/VMware-vSphere/6.5/rn/esxi650-202102001.html

  

VMware vCloud Foundation 4.2

https://docs.vmware.com/en/VMware-Cloud-Foundation/4.2/rn/VMware-Cloud-Foundation-42-Release-Notes.html

  

VMware vCloud Foundation 3.10.1.2

https://docs.vmware.com/en/VMware-Cloud-Foundation/3.10.1/rn/VMware-Cloud-Foundation-3101-Release-Notes.html

  

vCenter Server 7.0.1 Update 1

https://my.vmware.com/web/vmware/downloads/details?downloadGroup=VC70U1C&productId=974

https://docs.vmware.com/en/VMware-vSphere/7.0/rn/vsphere-vcenter-server-70u1c-release-notes.html

vCenter Server 6.7 U3l

https://my.vmware.com/web/vmware/downloads/details?downloadGroup=VC67U3L&productId=742&rPId=57171

https://docs.vmware.com/en/VMware-vSphere/6.7/rn/vsphere-vcenter-server-67u3l-release-notes.html

vCenter Server 6.5 U3n

https://my.vmware.com/web/vmware/downloads/details?downloadGroup=VC65U3N&productId=614&rPId=60942

https://docs.vmware.com/en/VMware-vSphere/6.5/rn/vsphere-vcenter-server-65u3n-release-notes.html

3.2临时防护措施

3.2.1CVE-2021-21972

可参考官方临时修复建议(https://kb.vmware.com/s/article/82374)禁用vROPS插件:

1.通过SSH远程连接到VCSA(或远程桌面连接到Windows VC

2.备份以下文件:

/etc/vmware/vsphere-ui/compatibility-matrix.xml (vCSA)

C:\ProgramData\VMware\vCenterServer\cfg\vsphere-ui (Windows VC)

3.使用文本编辑器添加一行:

<Matrix>
<pluginsCompatibility>
. . . .
<PluginPackage id=”com.vmware.vrops.install” status=”incompatible”/>
. . . .
</pluginsCompatibility> </Matrix>

最终文件内容如下:


4.vsphere-ui服务,命令:vmon-cli -r vsphere-ui

5.检查禁用情况:访问https://<VC-IP-or-FQDN>/ui/vropspluginui/rest/services/checkmobregister,该页面应显示404


VSphere Client页面的Solutions->Client Plugins中,VMware vRops Client Plugin插件应显示“incompatible”


3.2.2 CVE-2021-21974

可参考官方临时修复建议(https://kb.vmware.com/s/article/76372)禁用CIM服务器:

  1. 使用以下命令在ESXi主机上停止SLP服务:/etc/init.d/slpd stop。仅当不使用SLP服务时,才可以停止该服务。可使用“esxcli system slp stats get”命令查看服务守护程序的运行状态。
  2. 使用以下命令禁用SLP服务:esxcli network firewall ruleset set -r CIMSLP -e 0
  3. 使用以下命令保证此更改重启后依旧生效:chkconfig slpd off
  4. 使用以下命令检查是否重启后更改成功:chkconfig –list | grep slpd。若成功,输出应为:slpd off

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