Denial of Service Vulnerability in .NET Framework and .NET Core by Microsoft
CVE-2019-0820

7.5HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft .net Framework 4.5.2
Microsoft .net Framework 4.6
.net Core
Microsoft .net Framework 4.7.2
Vendor
CVE Published:
16 May 2019

What is CVE-2019-0820?

A denial of service vulnerability has been identified in Microsoft’s .NET Framework and .NET Core, where improper processing of regular expression strings can result in service disruption. This issue arises from certain RegEx patterns leading to excessive resource consumption, affecting application performance and availability. It is crucial for administrators to be aware of this vulnerability and implement necessary measures to mitigate potential risks to their systems.

Affected Version(s)

.NET Core 1

.NET Core 1.1

.NET Core 2.1

References

https://portal.msrc.microsoft.com/en-US/security-guidance...
x_refsource_MISC
https://access.redhat.com/errata/RHSA-2019:1259
vendor-advisoryx_refsource_REDHAT

EPSS Score

5% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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CVE-2019-0820 : Denial of Service Vulnerability in .NET Framework and .NET Core by Microsoft