Fluentd TD-agent plugin 4.0.1 – Insecure Folder Permission

• Exploit Database
• 17 阅读

• 作者： Adrian Bondocea
  日期： 2021-01-05
• 类别：

  • local
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/49363/

• # Exploit Title: Fluentd TD-agent plugin 4.0.1 - Insecure Folder Permission
  # Date: 21.12.2020
  # Exploit Author: Adrian Bondocea
  # Vendor Homepage: https://www.fluentd.org/
  # Software Link: https://td-agent-package-browser.herokuapp.com/4/windows
  # Version: <v4.0.1
  # Tested on: Windows 10 x64
  # CVE : CVE-2020-28169
  # External URL: https://github.com/zubrahzz/FluentD-TD-agent-Exploit-CVE-2020-28169
  
  Description:
  The td-agent-builder plugin before 2020-12-18 for Fluentd allows attackers to gain privileges because the bin directory is writable by a user account, but a file in bin is executed as NT AUTHORITY\SYSTEM.
  
  Vulnerable Path: ( Authenticated Users have permission to write within the location )
  PS C:\opt\td-agent\bin> icacls C:\opt\td-agent\bin
  C:\opt\td-agent\bin BUILTIN\Administrators:(I)(OI)(CI)(F)
  NT AUTHORITY\SYSTEM:(I)(OI)(CI)(F)
  BUILTIN\Users:(I)(OI)(CI)(RX)
  NT AUTHORITY\Authenticated Users:(I)(M)
  NT AUTHORITY\Authenticated Users:(I)(OI)(CI)(IO)(M)
  
  Successfully processed 1 files; Failed processing 0 files
  
  Vulnerable service:
  PS C:\opt\td-agent\bin> get-service fluentdwinsvc
  
  Status Name DisplayName
  ------ ---- -----------
  RunningfluentdwinsvcFluentd Windows Service
  
  Service Path:
  "C:/opt/td-agent/bin/ruby.exe" -C t"C:/opt/td-agent/lib/ruby/gems/2.7.0/gems/fluentd-1.11.2/lib/fluent/command/.."
   winsvc.rb --service-name fluentdwinsvc