CVE-2019-0820
HIGHCVSS 7.5/10EPSS 5.88%
Last modified
CVE-2019-0820 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 5.88% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Microsoft | .Net Core | 1.0 | — |
| Microsoft | .Net Core | 1.1 | — |
| Microsoft | .Net Core | 2.1 | — |
| Microsoft | .Net Core | 2.2 | — |
| Microsoft | .Net Framework | 2.0 | Sp2 |
| Microsoft | .Net Framework | 3.0 | Sp2 |
| Microsoft | .Net Framework | 3.5 | — |
| Microsoft | .Net Framework | 3.5.1 | — |
| Microsoft | .Net Framework | 4.5.2 | — |
| Microsoft | .Net Framework | 4.6 | — |
| Microsoft | .Net Framework | 4.6.2 | — |
| Microsoft | .Net Framework | 4.7 | — |
| Microsoft | .Net Framework | 4.7.1 | — |
| Microsoft | .Net Framework | 4.7.2 | — |
| Microsoft | .Net Framework | 4.6.1 | — |
| Microsoft | .Net Framework | 4.8 | — |
| Redhat | Enterprise Linux | 8.0 | — |
| Redhat | Enterprise Linux Eus | 8.1 | — |
| Redhat | Enterprise Linux Eus | 8.2 | — |
| Redhat | Enterprise Linux Eus | 8.4 | — |
| Redhat | Enterprise Linux Eus | 8.6 | — |
| Redhat | Enterprise Linux Server Aus | 8.2 | — |
| Redhat | Enterprise Linux Server Aus | 8.4 | — |
| Redhat | Enterprise Linux Server Aus | 8.6 | — |
| Redhat | Enterprise Linux Server Tus | 8.2 | — |
| Redhat | Enterprise Linux Server Tus | 8.4 | — |
| Redhat | Enterprise Linux Server Tus | 8.6 | — |
References
- https://access.redhat.com/errata/RHSA-2019:1259Third Party Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0820Patch, Vendor Advisory
- https://access.redhat.com/errata/RHSA-2019:1259Third Party Advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0820Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2019-0820?
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.
How severe is CVE-2019-0820?
CVE-2019-0820 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 5.88% probability of exploitation in the next 30 days.
How do I fix CVE-2019-0820?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2019-0820?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST