HIGH
Core: NCL - SocketsHttpHandler mishandling 1xx response as a final response leads to info disclosure
Published Jan 8, 2019
7.5
HIGHCVSS 3.0
EPSS 9.61%
Description
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.
Affected products
-
- Version 2.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2StatusaffectedConstraints-
- Version 2.0 Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2StatusaffectedConstraints-
- Version 2.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2StatusaffectedConstraints-
- Version 3.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2StatusaffectedConstraints-
- Version 3.0 Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2StatusaffectedConstraints-
- Version 3.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2StatusaffectedConstraints-
- Version 3.5 on Windows 10 Version 1607 for 32-bit SystemsStatusaffectedConstraints-
- Version 3.5 on Windows 10 Version 1607 for x64-based SystemsStatusaffectedConstraints-
- Version 3.5 on Windows 10 Version 1703 for 32-bit SystemsStatusaffectedConstraints-
- Version 3.5 on Windows 10 Version 1703 for x64-based SystemsStatusaffectedConstraints-
- Version 3.5 on Windows 10 Version 1709 for 32-bit SystemsStatusaffectedConstraints-
- Version 3.5 on Windows 10 Version 1709 for ARM64-based SystemsStatusaffectedConstraints-
- Version 3.5 on Windows 10 Version 1709 for x64-based SystemsStatusaffectedConstraints-
- Version 3.5 on Windows 10 Version 1803 for 32-bit SystemsStatusaffectedConstraints-
- Version 3.5 on Windows 10 Version 1803 for ARM64-based SystemsStatusaffectedConstraints-
- Version 3.5 on Windows 10 Version 1803 for x64-based SystemsStatusaffectedConstraints-
- Version 3.5 on Windows 10 Version 1809 for 32-bit SystemsStatusaffectedConstraints-
- Version 3.5 on Windows 10 Version 1809 for x64-based SystemsStatusaffectedConstraints-
- Version 3.5 on Windows 10 for 32-bit SystemsStatusaffectedConstraints-
- Version 3.5 on Windows 10 for x64-based SystemsStatusaffectedConstraints-
- Version 3.5 on Windows 8.1 for 32-bit systemsStatusaffectedConstraints-
- Version 3.5 on Windows 8.1 for x64-based systemsStatusaffectedConstraints-
- Version 3.5 on Windows Server 2012StatusaffectedConstraints-
- Version 3.5 on Windows Server 2012 (Server Core installation)StatusaffectedConstraints-
- Version 3.5 on Windows Server 2012 R2StatusaffectedConstraints-
- Version 3.5 on Windows Server 2012 R2 (Server Core installation)StatusaffectedConstraints-
- Version 3.5 on Windows Server 2016StatusaffectedConstraints-
- Version 3.5 on Windows Server 2016 (Server Core installation)StatusaffectedConstraints-
- Version 3.5 on Windows Server 2019StatusaffectedConstraints-
- Version 3.5 on Windows Server 2019 (Server Core installation)StatusaffectedConstraints-
- Version 3.5 on Windows Server, version 1709 (Server Core Installation)StatusaffectedConstraints-
- Version 3.5 on Windows Server, version 1803 (Server Core Installation)StatusaffectedConstraints-
- Version 3.5.1 on Windows 7 for 32-bit Systems Service Pack 1StatusaffectedConstraints-
- Version 3.5.1 on Windows 7 for x64-based Systems Service Pack 1StatusaffectedConstraints-
- Version 3.5.1 on Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1StatusaffectedConstraints-
- Version 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1StatusaffectedConstraints-
- Version 3.5.1 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)StatusaffectedConstraints-
- Version 4.5.2 on Windows 7 for 32-bit Systems Service Pack 1StatusaffectedConstraints-
- Version 4.5.2 on Windows 7 for x64-based Systems Service Pack 1StatusaffectedConstraints-
- Version 4.5.2 on Windows 8.1 for 32-bit systemsStatusaffectedConstraints-
- Version 4.5.2 on Windows 8.1 for x64-based systemsStatusaffectedConstraints-
- Version 4.5.2 on Windows RT 8.1StatusaffectedConstraints-
- Version 4.5.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1StatusaffectedConstraints-
- Version 4.5.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)StatusaffectedConstraints-
- Version 4.5.2 on Windows Server 2008 for 32-bit Systems Service Pack 2StatusaffectedConstraints-
- Version 4.5.2 on Windows Server 2008 for x64-based Systems Service Pack 2StatusaffectedConstraints-
- Version 4.5.2 on Windows Server 2012StatusaffectedConstraints-
- Version 4.5.2 on Windows Server 2012 (Server Core installation)StatusaffectedConstraints-
- Version 4.5.2 on Windows Server 2012 R2StatusaffectedConstraints-
- Version 4.5.2 on Windows Server 2012 R2 (Server Core installation)StatusaffectedConstraints-
- Version 4.6 on Windows Server 2008 for 32-bit Systems Service Pack 2StatusaffectedConstraints-
- Version 4.6 on Windows Server 2008 for x64-based Systems Service Pack 2StatusaffectedConstraints-
- Version 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for 32-bit SystemsStatusaffectedConstraints-
- Version 4.6.2/4.7/4.7.1/4.7.2 on Windows 10 Version 1607 for x64-based SystemsStatusaffectedConstraints-
- Version 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016StatusaffectedConstraints-
- Version 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 (Server Core installation)StatusaffectedConstraints-
- Version 4.6/4.6.1/4.6.2 on Windows 10 for 32-bit SystemsStatusaffectedConstraints-
- Version 4.6/4.6.1/4.6.2 on Windows 10 for x64-based SystemsStatusaffectedConstraints-
- Version 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 7 for 32-bit Systems Service Pack 1StatusaffectedConstraints-
- Version 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 7 for x64-based Systems Service Pack 1StatusaffectedConstraints-
- Version 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 8.1 for 32-bit systemsStatusaffectedConstraints-
- Version 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows 8.1 for x64-based systemsStatusaffectedConstraints-
- Version 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows RT 8.1StatusaffectedConstraints-
- Version 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1StatusaffectedConstraints-
- Version 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)StatusaffectedConstraints-
- Version 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012StatusaffectedConstraints-
- Version 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 (Server Core installation)StatusaffectedConstraints-
- Version 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2StatusaffectedConstraints-
- Version 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2012 R2 (Server Core installation)StatusaffectedConstraints-
- Version 4.7.1/4.7.2 on Windows 10 Version 1709 for 32-bit SystemsStatusaffectedConstraints-
- Version 4.7.1/4.7.2 on Windows 10 Version 1709 for ARM64-based SystemsStatusaffectedConstraints-
- Version 4.7.1/4.7.2 on Windows 10 Version 1709 for x64-based SystemsStatusaffectedConstraints-
- Version 4.7.1/4.7.2 on Windows Server, version 1709 (Server Core Installation)StatusaffectedConstraints-
- Version 4.7.2 on Windows 10 Version 1803 for 32-bit SystemsStatusaffectedConstraints-
- Version 4.7.2 on Windows 10 Version 1803 for ARM64-based SystemsStatusaffectedConstraints-
- Version 4.7.2 on Windows 10 Version 1803 for x64-based SystemsStatusaffectedConstraints-
- Version 4.7.2 on Windows 10 Version 1809 for 32-bit SystemsStatusaffectedConstraints-
- Version 4.7.2 on Windows 10 Version 1809 for x64-based SystemsStatusaffectedConstraints-
- Version 4.7.2 on Windows Server 2019StatusaffectedConstraints-
- Version 4.7.2 on Windows Server 2019 (Server Core installation)StatusaffectedConstraints-
- Version 4.7.2 on Windows Server, version 1803 (Server Core Installation)StatusaffectedConstraints-
- Version 4.7/4.7.1/4.7.2 on Windows 10 Version 1703 for 32-bit SystemsStatusaffectedConstraints-
- Version 4.7/4.7.1/4.7.2 on Windows 10 Version 1703 for x64-based SystemsStatusaffectedConstraints-
- Version
-
- Version 2.1StatusaffectedConstraints-
- Version 2.2StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Microsoft | Microsoft .NET Framework | n/a |
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Microsoft | n/a | n/a |
|
Configuration 1
AND
OR
- 2.0
- 3.0
Running on/with
- n/a
Configuration 2
AND
- 3.5
Running on/with
OR
- n/a
- 1607
- 1703
- 1709
- 1803
- 1809
- n/a
- n/a
- r2
- n/a
- n/a
Configuration 3
AND
- 3.5.1
Running on/with
OR
- n/a
- r2
- r2
Configuration 4
AND
- 4.5.2
Running on/with
OR
- n/a
- n/a
- n/a
- n/a
- r2
- n/a
- r2
Configuration 5
AND
OR
- 4.6.2
- 4.7
- 4.7.1
- 4.7.2
Running on/with
OR
- 1607
- n/a
Configuration 6
AND
OR
- 4.6
- 4.6.1
- 4.6.2
- 4.7
- 4.7.1
- 4.7.2
Running on/with
OR
- n/a
- n/a
- n/a
- r2
- n/a
- r2
Configuration 7
AND
OR
- 4.7.1
- 4.7.2
Running on/with
OR
- 1709
- 1709
Configuration 8
AND
- 4.7.2
Running on/with
OR
- 1803
- 1803
Configuration 9
AND
OR
- 4.7
- 4.7.1
- 4.7.2
Running on/with
- 1703
No data.
.NET Core on Red Hat Enterprise Linux
rh-dotnet21-0:2.1-6.el7
Fixed · RHSA-2019:0040
.NET Core on Red Hat Enterprise Linux
rh-dotnet21-dotnet-0:2.1.503-1.el7
Fixed · RHSA-2019:0040
.NET Core on Red Hat Enterprise Linux
rh-dotnet22-0:2.2-2.el7
Fixed · RHSA-2019:0040
.NET Core on Red Hat Enterprise Linux
rh-dotnet22-dotnet-0:2.2.102-1.el7
Fixed · RHSA-2019:0040
.NET Core 1.0 on Red Hat Enterprise Linux
rh-dotnetcore10-dotnetcore
Not affected
.NET Core 1.1 on Red Hat Enterprise Linux
rh-dotnetcore11-dotnetcore
Not affected
Red Hat Enterprise Linux 8
dotnet
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| .NET Core on Red Hat Enterprise Linux | rh-dotnet21-0:2.1-6.el7 | Fixed | RHSA-2019:0040 |
| .NET Core on Red Hat Enterprise Linux | rh-dotnet21-dotnet-0:2.1.503-1.el7 | Fixed | RHSA-2019:0040 |
| .NET Core on Red Hat Enterprise Linux | rh-dotnet22-0:2.2-2.el7 | Fixed | RHSA-2019:0040 |
| .NET Core on Red Hat Enterprise Linux | rh-dotnet22-dotnet-0:2.2.102-1.el7 | Fixed | RHSA-2019:0040 |
| .NET Core 1.0 on Red Hat Enterprise Linux | rh-dotnetcore10-dotnetcore | Not affected | n/a |
| .NET Core 1.1 on Red Hat Enterprise Linux | rh-dotnetcore11-dotnetcore | Not affected | n/a |
| Red Hat Enterprise Linux 8 | dotnet | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
7.5 HIGH NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact None
Availability Impact None
1 other source (Red Hat) ▾
5.9 MEDIUM Red Hat
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact None
Availability Impact None
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:P/I:N/A:N
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact Partial
Integrity Impact None
Availability Impact None
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
9.61% 0.09611
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.09611
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (35 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 9.61% (0.09611) | 95.34th | v5 (v2026.06.15) |
| Sep 22, 2026 | 9.61% (0.09611) | 95.26th | v5 (v2026.06.15) |
| Sep 21, 2026 | 8.38% (0.08384) | 94.80th | v5 (v2026.06.15) |
| Sep 6, 2026 | 9.61% (0.09611) | 95.15th | v5 (v2026.06.15) |
| Sep 5, 2026 | 8.38% (0.08384) | 94.68th | v5 (v2026.06.15) |
| Aug 30, 2026 | 9.61% (0.09611) | 95.13th | v5 (v2026.06.15) |
| Aug 28, 2026 | 8.38% (0.08384) | 94.65th | v5 (v2026.06.15) |
| Aug 24, 2026 | 9.61% (0.09611) | 95.09th | v5 (v2026.06.15) |
| Aug 23, 2026 | 8.38% (0.08384) | 94.63th | v5 (v2026.06.15) |
| Jun 15, 2026 | 9.61% (0.09611) | 94.84th | v5 (v2026.06.15) |
| Jun 8, 2026 | 13.94% (0.13936) | 94.47th | v4 (v2025.03.14) |
| May 2, 2026 | 11.02% (0.11022) | 93.46th | v4 (v2025.03.14) |
| Feb 19, 2026 | 9.65% (0.09650) | 92.73th | v4 (v2025.03.14) |
| Jan 2, 2026 | 8.43% (0.08427) | 92.09th | v4 (v2025.03.14) |
| Sep 28, 2025 | 6.74% (0.06737) | 90.93th | v4 (v2025.03.14) |
| Sep 26, 2025 | 3.65% (0.03649) | 87.40th | v4 (v2025.03.14) |
| Mar 30, 2025 | 6.00% (0.05995) | 89.74th | v4 (v2025.03.14) |
| Mar 29, 2025 | 20.01% (0.20010) | 92.62th | v4 (v2025.03.14) |
| Mar 17, 2025 | 6.74% (0.06737) | 90.58th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.66% (0.01660) | 88.12th | v3 (v2023.03.01) |
| Jul 10, 2024 | 1.97% (0.01970) | 88.87th | v3 (v2023.03.01) |
| Jun 21, 2024 | 1.87% (0.01868) | 88.50th | v3 (v2023.03.01) |
| May 31, 2024 | 1.96% (0.01956) | 88.69th | v3 (v2023.03.01) |
| Feb 6, 2024 | 1.76% (0.01757) | 86.69th | v3 (v2023.03.01) |
| Jan 2, 2024 | 1.78% (0.01784) | 86.71th | v3 (v2023.03.01) |
| Sep 3, 2023 | 2.10% (0.02098) | 87.72th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.57% (0.01572) | 85.20th | v3 (v2023.03.01) |
| Mar 6, 2023 | 5.85% (0.05853) | 90.48th | v2 (v2022.01.01) |
| Oct 15, 2022 | 5.27% (0.05274) | 89.46th | v2 (v2022.01.01) |
| Apr 1, 2022 | 4.00% (0.04004) | 84.54th | v2 (v2022.01.01) |
| Feb 4, 2022 | 15.37% (0.15370) | 92.49th | v2 (v2022.01.01) |
| Feb 3, 2022 | 30.10% (0.30098) | 96.74th | v1 |
| Jan 6, 2022 | 30.10% (0.30098) | 96.70th | v1 |
| Jan 5, 2022 | 8.76% (0.08756) | 93.91th | v5 (v2026.06.15) |
| Apr 14, 2021 | 8.76% (0.08756) | 0.00th | v1 |
Weaknesses (1)
References (9)
- http://www.securityfocus.com/bid/106405 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2019:0040 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2019-0545 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1660632 Issue Tracking
- https://github.com/advisories/GHSA-2xjx-v99w-gqf3 Advisory
- https://github.com/dotnet/announcements/issues/94
- https://nvd.nist.gov/vuln/detail/CVE-2019-0545
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0545 x_refsource_CONFIRMPatchVendor Advisory
- https://www.cve.org/CVERecord?id=CVE-2019-0545
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/106405 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/errata/RHSA-2019:0040 | vendor-advisoryx_refsource_REDHATThird Party Advisory | |
| https://access.redhat.com/security/cve/CVE-2019-0545 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1660632 | Issue Tracking | |
| https://github.com/advisories/GHSA-2xjx-v99w-gqf3 | Advisory | |
| https://github.com/dotnet/announcements/issues/94 | ||
| https://nvd.nist.gov/vuln/detail/CVE-2019-0545 | ||
| https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0545 | x_refsource_CONFIRMPatchVendor Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2019-0545 |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner microsoft
Published Jan 8, 2019
Updated Aug 4, 2024
Reserved Nov 26, 2018
Link CVE-2019-0545
CISA Vulnrichment
GHSA-2XJX-V99W-GQF3 Updated n/a