Attacker Value
Low
(1 user assessed)
Exploitability
Low
(1 user assessed)
User Interaction
None
Privileges Required
Low
Attack Vector
Local
0

CVE-2020-0754

Disclosure Date: February 11, 2020
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

Description

An elevation of privilege vulnerability exists in Windows Error Reporting (WER) when WER handles and executes files, aka ‘Windows Error Reporting Elevation of Privilege Vulnerability’. This CVE ID is unique from CVE-2020-0753.

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2
Ratings
Technical Analysis

Analysis is available at https://github.com/afang5472/CVE-2020-0753-and-CVE-2020-0754/blob/master/WERReport-CVE-2020-0754/WERRaceCondition.docx although it doesn’t seem like the PoC code is available upon initial inspection.

This vulnerability is fairly similar to CVE-2020-0753 and results in arbitrary file deletion as the SYSTEM user should an attacker be able to create a symbolic link for a temporary file at the right time.

Vulnerabilty also exists within wersvc.dll, although the given function name is not provided within the writeup to the best of my knowledge.

CVSS V3 Severity and Metrics
Base Score:
7.8 High
Impact Score:
5.9
Exploitability Score:
1.8
Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector (AV):
Local
Attack Complexity (AC):
Low
Privileges Required (PR):
Low
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
High
Availability (A):
High

General Information

Vendors

  • Microsoft

Products

  • Windows,
  • Windows Server,
  • 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 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)

Additional Info

Technical Analysis