Loading...
Skip to main content
GeekWala

CVE-2019-0820 — Regular Expression Denial of Service in...

HIGH

Regular Expression Denial of Service in System.Text.RegularExpressions

Published August 4, 2021Updated November 8, 2023Source: osv

Summary

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.

Advisory Timeline

  • First published August 4, 2021 (1895 days ago).
  • Last revised November 8, 2023 — 825 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

NuGet
Update System.Text.RegularExpressions to 4.3.1 or later
dotnet add package System.Text.RegularExpressions --version 4.3.1

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: nuget (1).

PackageEcosystemAffectedFixed In
System.Text.RegularExpressions
nuget
4.3.04.3.1

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 7.5 score means for each attack dimension.

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

References

Frequently Asked Questions

What is CVE-2019-0820?
Regular Expression Denial of Service in System.Text.RegularExpressions This vulnerability has been assigned a severity rating of HIGH (CVSS score: 7.5/10).
How do I check if my project is affected by CVE-2019-0820?
CVE-2019-0820 affects System.Text.RegularExpressions. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2019-0820 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
7.5

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-cmhx-cq75-c4mj

Related CVEs

More NuGet advisories

Check if you're affected

Scan your dependencies to see if this vulnerability affects your projects.

Scan Your Dependencies