Vulnerability Name:

CVE-2021-31977 (CCN-202523)

Assigned:2021-06-08
Published:2021-06-08
Updated:2021-06-14
Summary:Windows Hyper-V Denial of Service Vulnerability
CVSS v3 Severity:8.6 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H)
7.5 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
8.6 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H)
7.5 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Changed
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-119
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2021-31977

Source: XF
Type: UNKNOWN
ms-windows-cve202131977-dos(202523)

Source: CCN
Type: Microsoft Security TechCenter - June 2021
Windows Hyper-V Denial of Service Vulnerability

Source: MISC
Type: Patch, Vendor Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31977

Vulnerable Configuration:Configuration 1:
  • cpe:/o:microsoft:windows_10:-:*:*:*:*:*:*:*
  • OR cpe:/o:microsoft:windows_10:20h2:*:*:*:*:*:*:*
  • OR cpe:/o:microsoft:windows_10:21h1:*:*:*:*:*:*:*
  • OR cpe:/o:microsoft:windows_10:1607:*:*:*:*:*:*:*
  • OR cpe:/o:microsoft:windows_10:1809:*:*:*:*:*:*:*
  • OR cpe:/o:microsoft:windows_10:1909:*:*:*:*:*:*:*
  • OR cpe:/o:microsoft:windows_10:2004:*:*:*:*:*:*:*
  • OR cpe:/o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*
  • OR cpe:/o:microsoft:windows_server_2016:20h2:*:*:*:*:*:*:*
  • OR cpe:/o:microsoft:windows_server_2016:1909:*:*:*:*:*:*:*
  • OR cpe:/o:microsoft:windows_server_2016:2004:*:*:*:*:*:*:*
  • OR cpe:/o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*

  • Configuration CCN 1:
  • cpe:/o:microsoft:windows_10:::~~~~x64~:*:*:*:*:*
  • OR cpe:/o:microsoft:windows_server:2016:*:*:*:*:*:*:*
  • OR cpe:/o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*
  • OR cpe:/o:microsoft:windows_10:1607::~~~~x64~:*:*:*:*:*
  • OR cpe:/o:microsoft:windows_10:2004:*:*:*:*:*:x64:*
  • OR cpe:/o:microsoft:windows_10:1909:*:*:*:*:*:x64:*
  • OR cpe:/o:microsoft:windows_10:20h2:*:*:*:*:*:x64:*
  • OR cpe:/o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*
  • OR cpe:/o:microsoft:windows_server:2004:*:*:*:*:*:*:*
  • OR cpe:/o:microsoft:windows_server:20h2:*:*:*:*:*:*:*
  • OR cpe:/o:microsoft:windows_server:2016:*:*:*:*:*:*:*

  • * Denotes that component is vulnerable
    BACK
    microsoft windows 10 -
    microsoft windows 10 20h2
    microsoft windows 10 21h1
    microsoft windows 10 1607
    microsoft windows 10 1809
    microsoft windows 10 1909
    microsoft windows 10 2004
    microsoft windows server 2016 -
    microsoft windows server 2016 20h2
    microsoft windows server 2016 1909
    microsoft windows server 2016 2004
    microsoft windows server 2019 -
    microsoft windows 10
    microsoft windows server 2016
    microsoft windows server 2019 -
    microsoft windows 10 1607
    microsoft windows 10 2004
    microsoft windows 10 1909
    microsoft windows 10 20h2
    microsoft windows server 2019 -
    microsoft windows server 2004
    microsoft windows server 20h2
    microsoft windows server 2016