CVE-2020-0787: Windows Background Intelligent Transfer Service Elevation of Privilege Vulnerability

Overview

Severity
High (CVSS 7.8)
CVSS Vector
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Category
Elevation of Privilege
Exploit Status
Not Exploited
Exploitation Likelihood
Less Likely
Patch Tuesday
2020-Mar
Released
2020-03-10
EPSS Score
60.81% (percentile: 98.3%)
CISA KEV
Listed — due 2022-07-28

Description

An elevation of privilege vulnerability exists when the Windows Background Intelligent Transfer Service (BITS) improperly handles symbolic links. An attacker who successfully exploited this vulnerability could overwrite a targeted file leading to an elevated status. To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control of an affected system. The security update addresses the vulnerability by correcting how Windows BITS handles symbolic links.

Known Exploits (9)

  • Microsoft Windows Background Intelligent Transfer Service (BITS) Improper Privilege Management Vulnerability — added 2024-01-24T09:08:32+08:00
  • Microsoft Windows Background Intelligent Transfer Service (BITS) Improper Privilege Management Vulnerability — added 2022-02-15T16:11:04+08:00
  • Microsoft Windows Background Intelligent Transfer Service (BITS) Improper Privilege Management Vulnerability — added 2022-01-11T18:06:25+08:00
  • Microsoft Windows Background Intelligent Transfer Service (BITS) Improper Privilege Management Vulnerability — added 2021-11-16T11:04:42Z
  • Microsoft Windows Background Intelligent Transfer Service (BITS) Improper Privilege Management Vulnerability — added 2020-12-20T14:35:44+08:00
  • Microsoft Windows Background Intelligent Transfer Service (BITS) Improper Privilege Management Vulnerability — added 2020-08-09T05:48:10Z
  • Microsoft Windows Background Intelligent Transfer Service (BITS) Improper Privilege Management Vulnerability — added 2020-06-30T10:29:47+08:00
  • Microsoft Windows Background Intelligent Transfer Service (BITS) Improper Privilege Management Vulnerability — added 2020-06-16T16:43:39+08:00
  • Microsoft Windows Background Intelligent Transfer Service (BITS) Improper Privilege Management Vulnerability — added 2020-06-16T08:57:51Z

Detection & Weaponization (2 sources)

Maturity: Exploit

  • Metasploit modules: Background Intelligent Transfer Service Arbitrary File Move Privilege Elevation Vulnerability
  • GitHub PoC: 4 repositories

Affected Products (41)

Windows

  • Windows 10 Version 1803 for 32-bit Systems
  • Windows 10 Version 1803 for x64-based Systems
  • Windows Server, version 1803 (Server Core Installation)
  • Windows 10 Version 1803 for ARM64-based Systems
  • Windows 10 Version 1809 for 32-bit Systems
  • Windows 10 Version 1809 for x64-based Systems
  • Windows 10 Version 1809 for ARM64-based Systems
  • Windows Server 2019
  • Windows Server 2019 (Server Core installation)
  • Windows 10 Version 1909 for 32-bit Systems
  • Windows 10 Version 1909 for x64-based Systems
  • Windows 10 Version 1909 for ARM64-based Systems
  • Windows Server, version 1909 (Server Core installation)
  • Windows 10 Version 1709 for 32-bit Systems
  • Windows 10 Version 1709 for x64-based Systems
  • Windows 10 Version 1709 for ARM64-based Systems
  • Windows 10 Version 1903 for 32-bit Systems
  • Windows 10 Version 1903 for x64-based Systems
  • Windows 10 Version 1903 for ARM64-based Systems
  • Windows Server, version 1903 (Server Core installation)
  • Windows 10 for 32-bit Systems
  • Windows 10 for x64-based Systems
  • Windows 10 Version 1607 for 32-bit Systems
  • Windows 10 Version 1607 for x64-based Systems
  • Windows Server 2016
  • Windows Server 2016 (Server Core installation)
  • Windows 8.1 for 32-bit systems
  • Windows 8.1 for x64-based systems
  • Windows RT 8.1
  • Windows Server 2012
  • Windows Server 2012 (Server Core installation)
  • Windows Server 2012 R2
  • Windows Server 2012 R2 (Server Core installation)

ESU

  • Windows 7 for 32-bit Systems Service Pack 1
  • Windows 7 for x64-based Systems Service Pack 1
  • Windows Server 2008 for 32-bit Systems Service Pack 2
  • Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
  • Windows Server 2008 for x64-based Systems Service Pack 2
  • Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
  • Windows Server 2008 R2 for x64-based Systems Service Pack 1
  • Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)

Security Updates (14)

Acknowledgments

Clément Labro (<a href="https://twitter.com/itm4n">@itm4n</a>), Jarvis_1oop of Pinduoduo Security Research Lab

Revision History

  • 2020-03-10: Information published.