Vulnerability Name:

CVE-2021-1721 (CCN-195571)

Assigned:2020-12-02
Published:2021-02-09
Updated:2021-08-16
Summary:.NET Core and Visual Studio Denial of Service Vulnerability
CVSS v3 Severity:6.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H)
5.7 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/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): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
6.5 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H)
5.7 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/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): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
6.5 Medium (REDHAT CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H)
5.7 Medium (REDHAT Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/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): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
CVSS v2 Severity:4.3 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
6.8 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-noinfo
CWE-674
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2021-1721

Source: XF
Type: UNKNOWN
ms-dotnet-cve20211721-dos(195571)

Source: CCN
Type: Microsoft Security TechCenter - February 2021
.NET Core and Visual Studio Denial of Service Vulnerability

Source: N/A
Type: Patch, Vendor Advisory
N/A

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2021-1721

Vulnerable Configuration:Configuration 1:
  • cpe:/a:microsoft:.net:*:*:*:*:*:*:*:* (Version >= 5.0 and <= 5.0.2)
  • OR cpe:/a:microsoft:.net_core:*:*:*:*:*:*:*:* (Version >= 2.1 and <= 2.1.24)
  • OR cpe:/a:microsoft:.net_core:*:*:*:*:*:*:*:* (Version >= 3.1 and <= 3.1.11)
  • OR cpe:/a:microsoft:visual_studio_2017:*:*:*:*:*:*:*:* (Version >= 15.0 and <= 15.9)
  • OR cpe:/a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:* (Version >= 16.0 and <= 16.8)
  • OR cpe:/a:microsoft:powershell_core:7.0:*:*:*:*:*:*:*
  • OR cpe:/a:microsoft:powershell_core:7.1:*:*:*:*:*:*:*

    • Configuration RedHat 1:
  • cpe:/a:redhat:enterprise_linux:8:*:*:*:*:*:*:*

    • Configuration RedHat 2:
  • cpe:/a:redhat:enterprise_linux:8::appstream:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:microsoft:.net_core:2.1:-:*:*:*:*:*:*
  • OR cpe:/a:microsoft:.net_core:3.1:-:*:*:*:*:*:*
  • OR cpe:/a:microsoft:.net_core:5.0:-:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.redhat.rhsa:def:20210471
    P
    		RHSA-2021:0471: dotnet3.1 security and bugfix update (Important)
    2021-02-10
    oval:com.redhat.rhsa:def:20210474
    P
    		RHSA-2021:0474: dotnet security and bugfix update (Important)
    2021-02-10
    oval:com.redhat.rhsa:def:20210476
    P
    		RHSA-2021:0476: dotnet5.0 security and bugfix update (Important)
    2021-02-10
    BACK
    microsoft .net *
    microsoft .net core *
    microsoft .net core *
    microsoft visual studio 2017 *
    microsoft visual studio 2019 *
    microsoft powershell core 7.0
    microsoft powershell core 7.1
    microsoft .net core 2.1
    microsoft .net core 3.1
    microsoft .net core 5.0