CVE-2019-0657High

.NET Framework and Visual Studio Spoofing Vulnerability

Published
February 12, 2019
Last Modified
—

🔗 CVE IDs covered (1)

CVE-2019-0657 →

📋 Description

A vulnerability exists in certain .Net Framework API's and Visual Studio in the way they parse URL's. An attacker who successfully exploited this vulnerability could use it to bypass security logic intended to ensure that a user-provided URL belonged to a specific hostname or a subdomain of that hostname. This could be used to cause privileged communication to be made to an untrusted service as if it was a trusted service. To exploit the vulnerability, an attacker must provide a URL string to an application that attempts to verify that the URL belongs to a specific hostname or to a subdomain of that hostname. The application must then make an HTTP request to the attacker-provided URL either directly or by sending a processed version of the attacker-provided URL to a web browser.

🎯 Affected products87

  • .NET Core 1.0
  • .NET Core 2.1
  • .NET Core 2.2
  • Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2
  • Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2
  • Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2
  • Microsoft .NET Framework 3.0 Service Pack 2 on Windows Server 2008 for x64-based Systems Service Pack 2
  • Microsoft .NET Framework 3.5 on Windows 10 Version 1607 for 32-bit Systems
  • Microsoft .NET Framework 3.5 on Windows 10 Version 1607 for x64-based Systems
  • Microsoft .NET Framework 3.5 on Windows 10 Version 1703 for 32-bit Systems
  • Microsoft .NET Framework 3.5 on Windows 10 Version 1703 for x64-based Systems
  • Microsoft .NET Framework 3.5 on Windows 10 Version 1709 for 32-bit Systems
  • Microsoft .NET Framework 3.5 on Windows 10 Version 1709 for ARM64-based Systems
  • Microsoft .NET Framework 3.5 on Windows 10 Version 1709 for x64-based Systems
  • Microsoft .NET Framework 3.5 on Windows 10 Version 1803 for 32-bit Systems
  • Microsoft .NET Framework 3.5 on Windows 10 Version 1803 for ARM64-based Systems
  • Microsoft .NET Framework 3.5 on Windows 10 Version 1803 for x64-based Systems
  • Microsoft .NET Framework 3.5 on Windows 10 Version 1809 for 32-bit Systems
  • Microsoft .NET Framework 3.5 on Windows 10 Version 1809 for x64-based Systems
  • Microsoft .NET Framework 3.5 on Windows 10 for 32-bit Systems
  • Microsoft .NET Framework 3.5 on Windows 10 for x64-based Systems
  • Microsoft .NET Framework 3.5 on Windows 8.1 for 32-bit systems
  • Microsoft .NET Framework 3.5 on Windows 8.1 for x64-based systems
  • Microsoft .NET Framework 3.5 on Windows Server 2012
  • Microsoft .NET Framework 3.5 on Windows Server 2012 (Server Core installation)
  • Microsoft .NET Framework 3.5 on Windows Server 2012 R2
  • Microsoft .NET Framework 3.5 on Windows Server 2012 R2 (Server Core installation)
  • Microsoft .NET Framework 3.5 on Windows Server 2016
  • Microsoft .NET Framework 3.5 on Windows Server 2019
  • Microsoft .NET Framework 3.5 on Windows Server 2019 (Server Core installation)
  • +57 more not shown

✅ Remediation

KBRelease Notes (Security Update) KB4487017 (Security Update) KB4487018 (Security Update) KB4487078 (Monthly Rollup) KB4487121 (Security Only) KB4483450 (Monthly Rollup) KB4487123 (Security Only) KB4487079 (Monthly Rollup) KB4487122 (Security Only) KB4487026 (Security Update) KB4487020 (Security Update) KB4486996 (Security Update) KB4487081 (Monthly Rollup) KB4487124 (Security Only) KB4483452 (Monthly Rollup)

🔗 References (38)