Skip to content
Fencer Vulns
high 7.5

CVE-2019-0545 json

Exposure of Sensitive Information in System.Net.Http

published 2019-01-08 7 y ago modified 2026-06-17 4 mo ago also GHSA-2xjx-v99w-gqf3 , EUVD-2022-2071

cvss
7.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
9.6%
EPSS 9.6% chance of exploitation in 30 days, percentile 95%
public exploits
0
none known

Summary

An information disclosure vulnerability exists in .NET Framework and .NET Core which allows bypassing Cross-origin Resource Sharing (CORS) configurations, aka ".NET Framework Information Disclosure Vulnerability." This affects Microsoft .NET Framework 2.0, Microsoft .NET Framework 3.0, Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2, Microsoft .NET Framework 4.5.2, Microsoft .NET Framework 4.6, Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2, Microsoft .NET Framework 4.7/4.7.1/4.7.2, .NET Core 2.1, Microsoft .NET Framework 4.7.1/4.7.2, Microsoft .NET Framework 3.5, Microsoft .NET Framework 3.5.1, Microsoft .NET Framework 4.6/4.6.1/4.6.2, .NET Core 2.2, Microsoft .NET Framework 4.7.2.

Patch / fix

  • nuget Microsoft.NETCore.App 2.1.7, 2.2.1
  • rh-dotnet21 RHEL 2.1 DOTNET 2.1-6.el7
  • rh-dotnet22 RHEL 2.2 DOTNET 2.2-2.el7
  • rh-dotnet21-dotnet RHEL 2.1 DOTNET 2.1.503-1.el7
  • rh-dotnet22-dotnet RHEL 2.2 DOTNET 2.2.102-1.el7
  • rh-dotnet21-runtime RHEL 2.1 DOTNET 2.1-6.el7
  • rh-dotnet22-runtime RHEL 2.2 DOTNET 2.2-2.el7
  • rh-dotnet21-dotnet-host RHEL 2.1 DOTNET 2.1.7-1.el7
  • rh-dotnet22-dotnet-host RHEL 2.2 DOTNET 2.2.1-1.el7

red hat advisories RHSA-2019:0040

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2019-0545 updated cvss 5.9

Core: NCL - SocketsHttpHandler mishandling 1xx response as a final response leads to info disclosure

  • Red Hat .NET Core on Red Hat Enterprise Linux ComputeNode (v. 7) rh-dotnet21 2.1-6.el7, rh-dotnet22 2.2-2.el7, rh-dotnet21-runtime 2.1-6.el7, rh-dotnet22-runtime 2.2-2.el7, rh-dotnet21-dotnet 2.1.503-1.el7, rh-dotnet22-dotnet 2.2.102-1.el7, +9 more Red Hat .NET Core on Red Hat Enterprise Linux Server (v. 7) rh-dotnet21 2.1-6.el7, rh-dotnet22 2.2-2.el7, rh-dotnet21-runtime 2.1-6.el7, rh-dotnet22-runtime 2.2-2.el7, rh-dotnet21-dotnet 2.1.503-1.el7, rh-dotnet22-dotnet 2.2.102-1.el7, +9 more Red Hat .NET Core on Red Hat Enterprise Linux Workstation (v. 7) rh-dotnet21 2.1-6.el7, rh-dotnet22 2.2-2.el7, rh-dotnet21-runtime 2.1-6.el7, rh-dotnet22-runtime 2.2-2.el7, rh-dotnet21-dotnet 2.1.503-1.el7, rh-dotnet22-dotnet 2.2.102-1.el7, +9 more
    fixed: vendor fix RHSA-2019:0040
  • Red Hat .NET Core 1.0 on Red Hat Enterprise Linux rh-dotnetcore10-dotnetcore Red Hat .NET Core 1.1 on Red Hat Enterprise Linux rh-dotnetcore11-dotnetcore Red Hat Enterprise Linux 8 dotnet, dotnet-host, dotnet-sdk-2.1, dotnet-runtime-2.1, dotnet-sdk-2.1.5xx, dotnet-host-fxr-2.1
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

9.61% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N
GitHub 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem package affected fixed in
nuget Microsoft.NETCore.App
>=2.1.0, <2.1.7
>=2.2.0, <2.2.1
2.1.7
2.2.1

Affected products

  • Microsoft .NET Core
  • Microsoft Microsoft .NET Framework

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.