Attacker Value
Moderate
(2 users assessed)
Exploitability
Unknown
(2 users assessed)
User Interaction
None
Privileges Required
Low
Attack Vector
Local
2

CVE-2021-31199

Disclosure Date: June 08, 2021
Exploited in the Wild
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

Description

Microsoft Enhanced Cryptographic Provider Elevation of Privilege Vulnerability This CVE ID is unique from CVE-2021-31201.

Add Assessment

2
Ratings
  • Attacker Value
    Medium
Technical Analysis

Not got much to contribute due to limited public information at this time but I did want to note that the Confidentiality and Integrity scores for this are oddly listed as Low, the Availability as None, and yet Scope is marked as Changed. My guess is that this is some sort of sandbox related escape given that if we were able to get higher permissions these scores would be a lot higher.

1
Ratings
Technical Analysis

This vulnerability is abused in an exploitation chain. According to the Microsoft advisory it is abused with Adobe Acrobat CVE-2021-28550.

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 1909 for 32-bit Systems,
  • Windows 10 Version 1909 for x64-based Systems,
  • Windows 10 Version 1909 for ARM64-based Systems,
  • Windows 10 Version 21H1 for x64-based Systems,
  • Windows 10 Version 21H1 for ARM64-based Systems,
  • Windows 10 Version 21H1 for 32-bit Systems,
  • 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 20H2 for x64-based Systems,
  • Windows 10 Version 20H2 for 32-bit Systems,
  • Windows 10 Version 20H2 for ARM64-based Systems,
  • Windows Server, version 20H2 (Server Core Installation)

Exploited in the Wild

Reported by:
Reported: June 09, 2021 6:57am UTC (1 month ago)
Reported: June 17, 2021 2:46pm UTC (1 month ago)

Additional Info

Technical Analysis