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Regular Expression Denial of Service in System.Text.RegularExpressions

High severity GitHub Reviewed Published Aug 4, 2021 to the GitHub Advisory Database • Updated Feb 21, 2023

Package

nuget System.Text.RegularExpressions (NuGet)

Affected versions

>= 4.3.0, < 4.3.1

Patched versions

4.3.1

Description

A denial of service vulnerability exists when .NET Framework and .NET Core improperly process RegEx strings, aka '.NET Framework and .NET Core Denial of Service Vulnerability'. This CVE ID is unique from CVE-2019-0980, CVE-2019-0981.

References

Published by the National Vulnerability Database May 16, 2019
Reviewed Aug 4, 2021
Published to the GitHub Advisory Database Aug 4, 2021
Last updated Feb 21, 2023

Severity

High
7.5
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weaknesses

CVE ID

CVE-2019-0820

GHSA ID

GHSA-cmhx-cq75-c4mj

Source code

No known source code

Credits

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