CVE-2021-31957

ASP.NET Core Denial of Service Vulnerability

Severity Score

5.9

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

ASP.NET Core Denial of Service Vulnerability

Una vulnerabilidad de Denegación de Servicio en ASP.NET

A flaw was found in dotnet. The way client disconnects are handled can allow a remote, unauthenticated attacker to exploit this vulnerability to cause a denial of service against an ASP.NET Core application. The highest threat from this vulnerability is to system availability.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-04-30 CVE Reserved
2021-06-08 CVE Published
2024-02-22 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-772: Missing Release of Resource after Effective Lifetime

CAPEC

References (7)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-31957	2024-05-29

URL	Date	SRC
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4PRVVLXXQEF4SEJOBV3VRJHGX7YHY2CG	2024-05-29
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CVCDYIP4A6DDRT7G6P3ZW6PKNK2DNWJ2	2024-05-29
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PMHWHRRYDHKM6BIINW5V7OCSW4SDWB4W	2024-05-29
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VMAO4NG2OQ4PCXUQWMNSCMYWLIJJY6UY	2024-05-29
https://access.redhat.com/security/cve/CVE-2021-31957	2021-06-09
https://bugzilla.redhat.com/show_bug.cgi?id=1966990	2021-06-09

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Microsoft Search vendor "Microsoft"		.net Search vendor "Microsoft" for product ".net"				>= 5.0 <= 5.0.6 Search vendor "Microsoft" for product ".net" and version " >= 5.0 <= 5.0.6"		-		Affected
Microsoft Search vendor "Microsoft"		.net Core Search vendor "Microsoft" for product ".net Core"				>= 3.1 <= 3.1.15 Search vendor "Microsoft" for product ".net Core" and version " >= 3.1 <= 3.1.15"		-		Affected
Microsoft Search vendor "Microsoft"		Visual Studio 2019 Search vendor "Microsoft" for product "Visual Studio 2019"				>= 16.0 <= 16.10 Search vendor "Microsoft" for product "Visual Studio 2019" and version " >= 16.0 <= 16.10"		-		Affected
Microsoft Search vendor "Microsoft"		Visual Studio 2019 Search vendor "Microsoft" for product "Visual Studio 2019"				8.10 Search vendor "Microsoft" for product "Visual Studio 2019" and version "8.10"		macos		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				33 Search vendor "Fedoraproject" for product "Fedora" and version "33"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				34 Search vendor "Fedoraproject" for product "Fedora" and version "34"		-		Affected