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CVE-2019-0980· NVD / CVE Program· CNA microsoft

A denial of service vulnerability exists when .NET Framework or .NET Core improperly handle web requests, aka '.Net Framework and .Net Core

Noroxi assessment

Priority: Monitor (action score 31/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 4.9% (FIRST EPSS); higher than 92.1% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: System.Private.Uri (NuGet) 4.3.2; dotnet (Red Hat:enterprise_linux:8::appstream) 0:2.1.507-2.el8_0; dotnet-debuginfo (Red Hat:enterprise_linux:8::appstream) 0:2.1.507-2.el8_0.

Low priority for now. Upgrade to System.Private.Uri (NuGet) 4.3.2; dotnet (Red Hat:enterprise_linux:8::appstream) 0:2.1.507-2.el8_0; dotnet-debuginfo (Red Hat:enterprise_linux:8::appstream) 0:2.1.507-2.el8_0 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A denial of service vulnerability exists when .NET Framework or .NET Core improperly handle web requests, aka '.Net Framework and .Net Core Denial of Service Vulnerability'. This CVE ID is unique from CVE-2019-0820, CVE-2019-0981.

HighCVSS 7.5 · v3.0—No exploit Fix available
Published
May 16, 2019
Updated
Jun 16, 2026
EPSS
4.9% · 92th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 4.9%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
microsoft.net core
microsoft.net framework
microsoftwindows server 2008
microsoftwindows 10
microsoftwindows 8.1
microsoftwindows server 2012
microsoftwindows server 2016
microsoftwindows server 2019
microsoftwindows 7
microsoftwindows rt 8.1

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • microsoft .net core1.0
  • microsoft .net core1.1
  • microsoft .net core2.1
  • microsoft .net core2.2
  • microsoft .net framework2.0
  • microsoft .net framework3.0
  • microsoft .net framework3.5
  • microsoft .net framework3.5.1
  • microsoft .net framework4.5.2
  • microsoft .net framework4.6
  • microsoft .net framework4.6.1
  • microsoft .net framework4.6.2
  • microsoft .net framework4.7
  • microsoft .net framework4.7.1
  • microsoft .net framework4.7.2
  • microsoft .net framework4.8

Versions reported by the vendor

Affected version ranges reported by the assigning authority (microsoft). Independent of NVD's CPE analysis and usually ahead of it.

  • Microsoft .NET Core

    • 1, 1.1, 2.1, 2.2affected

  • Microsoft Microsoft .NET Framework 2.0

    • Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2, Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2, Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2affected

  • Microsoft Microsoft .NET Framework 3.0

    • Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2, Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2, Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2affected

  • Microsoft Microsoft .NET Framework 3.5

    • Windows Server 2012, Windows Server 2012 (Server Core installation), Windows 8.1 for 32-bit systems, Windows 8.1 for x64-based systems, Windows Server 2012 R2, Windows Server 2012 R2 (Server Core installation), Windows 10 for 32-bit Systems, Windows 10 for x64-based Systems, Windows Server 2016, Windows 10 Version 1607 for 32-bit Systems, Windows 10 Version 1607 for x64-based Systems, Windows Server 2016 (Server Core installation) … (+13)affected

  • Microsoft Microsoft .NET Framework 3.5 on Windows 10 Version 1903 for 32-bit Systems

    • unspecifiedaffected

  • Microsoft Microsoft .NET Framework 3.5 on Windows 10 Version 1903 for x64-based Systems

    • unspecifiedaffected

  • Microsoft Microsoft .NET Framework 3.5 on Windows Server, version 1903 (Server Core installation)

    • unspecifiedaffected

  • Microsoft Microsoft .NET Framework 3.5.1

    • Windows 7 for 32-bit Systems Service Pack 1, Windows 7 for x64-based Systems Service Pack 1, Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation), Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1, Windows Server 2008 R2 for x64-based Systems Service Pack 1affected

  • Microsoft Microsoft .NET Framework 4.5.2

    • Windows 7 for 32-bit Systems Service Pack 1, Windows 7 for x64-based Systems Service Pack 1, Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation), Windows Server 2008 R2 for x64-based Systems Service Pack 1, Windows Server 2012, Windows Server 2012 (Server Core installation), Windows 8.1 for 32-bit systems, Windows 8.1 for x64-based systems, Windows Server 2012 R2, Windows RT 8.1, Windows Server 2012 R2 (Server Core installation), Windows Server 2008 for 32-bit Systems Service Pack 2 … (+1)affected

  • Microsoft Microsoft .NET Framework 4.6

    • Windows Server 2008 for 32-bit Systems Service Pack 2, Windows Server 2008 for x64-based Systems Service Pack 2affected

  • Microsoft Microsoft .NET Framework 4.6.2 on Windows 10 for 32-bit Systems

    • unspecifiedaffected

  • Microsoft Microsoft .NET Framework 4.6.2 on Windows 10 for x64-based Systems

    • unspecifiedaffected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
NuGetSystem.Private.Urifrom 4.3.0 · before 4.3.24.3.2
Red Hat:enterprise_linux:8::appstreamdotnetbefore 0:2.1.507-2.el8_00:2.1.507-2.el8_0
Red Hat:enterprise_linux:8::appstreamdotnet-debuginfobefore 0:2.1.507-2.el8_00:2.1.507-2.el8_0
Red Hat:enterprise_linux:8::appstreamdotnet-debugsourcebefore 0:2.1.507-2.el8_00:2.1.507-2.el8_0
Red Hat:enterprise_linux:8::appstreamdotnet-hostbefore 0:2.1.11-2.el8_00:2.1.11-2.el8_0
Red Hat:enterprise_linux:8::appstreamdotnet-host-debuginfobefore 0:2.1.11-2.el8_00:2.1.11-2.el8_0
Red Hat:enterprise_linux:8::appstreamdotnet-host-fxr-2.1before 0:2.1.11-2.el8_00:2.1.11-2.el8_0
Red Hat:enterprise_linux:8::appstreamdotnet-host-fxr-2.1-debuginfobefore 0:2.1.11-2.el8_00:2.1.11-2.el8_0
Red Hat:enterprise_linux:8::appstreamdotnet-runtime-2.1before 0:2.1.11-2.el8_00:2.1.11-2.el8_0
Red Hat:enterprise_linux:8::appstreamdotnet-runtime-2.1-debuginfobefore 0:2.1.11-2.el8_00:2.1.11-2.el8_0
Red Hat:enterprise_linux:8::appstreamdotnet-sdk-2.1before 0:2.1.507-2.el8_00:2.1.507-2.el8_0
Red Hat:enterprise_linux:8::appstreamdotnet-sdk-2.1.5xxbefore 0:2.1.507-2.el8_00:2.1.507-2.el8_0
Red Hat:enterprise_linux:8::appstreamdotnet-sdk-2.1.5xx-debuginfobefore 0:2.1.507-2.el8_00:2.1.507-2.el8_0
Red Hat:rhel_dotnet:1.0::el7rh-dotnetcore10-dotnetcorebefore 0:1.0.16-1.el70:1.0.16-1.el7
Red Hat:rhel_dotnet:1.0::el7rh-dotnetcore10-dotnetcore-debuginfobefore 0:1.0.16-1.el70:1.0.16-1.el7
Red Hat:rhel_dotnet:1.1::el7rh-dotnetcore11-dotnetcorebefore 0:1.1.13-1.el70:1.1.13-1.el7
Red Hat:rhel_dotnet:1.1::el7rh-dotnetcore11-dotnetcore-debuginfobefore 0:1.1.13-1.el70:1.1.13-1.el7
Red Hat:rhel_dotnet:2.1::el7rh-dotnet21before 0:2.1-10.el70:2.1-10.el7
Red Hat:rhel_dotnet:2.1::el7rh-dotnet21-dotnetbefore 0:2.1.507-2.el70:2.1.507-2.el7
Red Hat:rhel_dotnet:2.1::el7rh-dotnet21-dotnet-debuginfobefore 0:2.1.507-2.el70:2.1.507-2.el7
Red Hat:rhel_dotnet:2.1::el7rh-dotnet21-dotnet-hostbefore 0:2.1.11-2.el70:2.1.11-2.el7
Red Hat:rhel_dotnet:2.1::el7rh-dotnet21-dotnet-runtime-2.1before 0:2.1.11-2.el70:2.1.11-2.el7
Red Hat:rhel_dotnet:2.1::el7rh-dotnet21-dotnet-sdk-2.1before 0:2.1.507-2.el70:2.1.507-2.el7
Red Hat:rhel_dotnet:2.1::el7rh-dotnet21-dotnet-sdk-2.1.5xxbefore 0:2.1.507-2.el70:2.1.507-2.el7

+14

Same product

microsoft: all records

Other highest-scoring records for the same primary product.

  • CVE-2020-1147A remote code execution vulnerability exists in .NET Framework, Microsoft SharePoint, and Visual Studio when the software fails to check theKEV
    89Now
  • CVE-2018-0764Microsoft .NET Framework 1.1, 2.0, 3.0, 3.5, 3.5.1, 4, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2 and 5.7 and .NET Core 1.0.
    33Monitor
  • CVE-2019-1301A denial of service vulnerability exists when .NET Core improperly handles web requests, aka '.NET Core Denial of Service Vulnerability'.
    32Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2019-0657Mar 5, 2019 · A vulnerability exists in certain .Net Framework API's and Visual Studio in the way they parse URL's, aka '.NET Framework and Visual Studio
    24Monitor
  • ← EarlierCVE-2019-0820May 16, 2019 · A denial of service vulnerability exists when .NET Framework and .NET Core improperly process RegEx strings, aka '.NET Framework and .NET Co
    32Monitor
  • Later →CVE-2019-0981May 16, 2019 · A denial of service vulnerability exists when .NET Framework or .NET Core improperly handle web requests, aka '.Net Framework and .Net Core
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
NuGet:System.Private.Uri4.3.2Package registry (OSV)
red hat:rh-dotnet210:2.1-10.el7 · Red Hat:rhel_dotnet:2.1::el7Package registry (OSV)
red hat:rh-dotnet21-dotnet0:2.1.507-2.el7 · Red Hat:rhel_dotnet:2.1::el7Package registry (OSV)
red hat:rh-dotnet21-dotnet-debuginfo0:2.1.507-2.el7 · Red Hat:rhel_dotnet:2.1::el7Package registry (OSV)
red hat:rh-dotnet21-dotnet-host0:2.1.11-2.el7 · Red Hat:rhel_dotnet:2.1::el7Package registry (OSV)
red hat:rh-dotnet21-dotnet-runtime-2.10:2.1.11-2.el7 · Red Hat:rhel_dotnet:2.1::el7Package registry (OSV)
red hat:rh-dotnet21-dotnet-sdk-2.10:2.1.507-2.el7 · Red Hat:rhel_dotnet:2.1::el7Package registry (OSV)
red hat:rh-dotnet21-dotnet-sdk-2.1.5xx0:2.1.507-2.el7 · Red Hat:rhel_dotnet:2.1::el7Package registry (OSV)
red hat:rh-dotnet21-runtime0:2.1-10.el7 · Red Hat:rhel_dotnet:2.1::el7Package registry (OSV)
red hat:rh-dotnetcore10-dotnetcore0:1.0.16-1.el7 · Red Hat:rhel_dotnet:1.0::el7Package registry (OSV)
red hat:rh-dotnetcore10-dotnetcore-debuginfo0:1.0.16-1.el7 · Red Hat:rhel_dotnet:1.0::el7Package registry (OSV)
red hat:rh-dotnetcore11-dotnetcore0:1.1.13-1.el7 · Red Hat:rhel_dotnet:1.1::el7Package registry (OSV)
red hat:rh-dotnetcore11-dotnetcore-debuginfo0:1.1.13-1.el7 · Red Hat:rhel_dotnet:1.1::el7Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-19 · Data Processing Errors

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records