CVE-2020-1386: Connected User Experiences and Telemetry Service Information Disclosure Vulnerability

Overview

Severity
Medium (CVSS 5.5)
CVSS Vector
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C
Category
Information Disclosure
Exploit Status
Not Exploited
Exploitation Likelihood
Less Likely
Patch Tuesday
2020-Jul
Released
2020-07-14
EPSS Score
0.48% (percentile: 65.1%)

Description

An information vulnerability exists when Windows Connected User Experiences and Telemetry Service improperly discloses file information. Successful exploitation of the vulnerability could allow the attacker to read any file on the file system. To exploit the vulnerability, an attacker would have to log onto an affected system and run a specially crafted application. The update addresses the vulnerability by changing the way Windows Connected User Experiences and Telemetry Service discloses file information.

FAQ

What type of information could be disclosed by this vulnerability? The type of information that could be disclosed if an attacker successfully exploited this vulnerability is unauthorized file system access - reading from the file system.

Affected Products (23)

Windows

  • Windows 10 Version 2004 for 32-bit Systems
  • Windows 10 Version 2004 for ARM64-based Systems
  • Windows 10 Version 2004 for x64-based Systems
  • Windows Server, version 2004 (Server Core installation)
  • Windows 10 Version 1803 for 32-bit Systems
  • Windows 10 Version 1803 for x64-based Systems
  • 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)

Security Updates (5)

Acknowledgments

Jarvis_1oop of Pinduoduo Security Research Lab, somaro, Tao Yan (<a href="https://twitter.com/Ga1ois">@Ga1ois</a>) from Palo Alto Networks, Linshuang Li

Revision History

  • 2020-07-14: Information published.