CVE-2019-1006High

WCF/WIF SAML Token Authentication Bypass Vulnerability

Published
July 9, 2019
Last Modified
—

🔗 CVE IDs covered (1)

CVE-2019-1006 →

📋 Description

An authentication bypass vulnerability exists in Windows Communication Foundation (WCF) and Windows Identity Foundation (WIF), allowing signing of SAML tokens with arbitrary symmetric keys. This vulnerability allows an attacker to impersonate another user, which can lead to elevation of privileges. The vulnerability exists in WCF, WIF 3.5 and above in .NET Framework, WIF 1.0 component in Windows, WIF Nuget package, and WIF implementation in SharePoint. An unauthenticated attacker can exploit this by signing a SAML token with any arbitrary symmetric key. This security update addresses the issue by ensuring all versions of WCF and WIF validate the key used to sign SAML tokens correctly.

🎯 Affected products138

  • Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for 32-bit Systems Service Pack 2
  • Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for Itanium-Based Systems Service Pack 2
  • Microsoft .NET Framework 2.0 Service Pack 2 on Windows Server 2008 for x64-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 AND 4.7.2 on Windows 10 Version 1809 for 32-bit Systems
  • Microsoft .NET Framework 3.5 AND 4.7.2 on Windows 10 Version 1809 for x64-based Systems
  • Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019
  • Microsoft .NET Framework 3.5 AND 4.7.2 on Windows Server 2019 (Server Core installation)
  • Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for 32-bit Systems
  • Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1809 for x64-based Systems
  • Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1903 for 32-bit Systems
  • Microsoft .NET Framework 3.5 AND 4.8 on Windows 10 Version 1903 for x64-based Systems
  • Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019
  • Microsoft .NET Framework 3.5 AND 4.8 on Windows Server 2019 (Server Core installation)
  • Microsoft .NET Framework 3.5 AND 4.8 on Windows Server, version 1903 (Server Core installation)
  • 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 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 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
  • +108 more not shown

✅ Remediation

KB4507453 (Security Update) KB4507458 (Security Update) KB4507435 (Security Update) KB4507452 (Monthly Rollup) KB4507461 (Security Only) KB4507462 (Monthly Rollup) KB4507464 (Security Only) KB4507449 (Monthly Rollup) KB4507456 (Security Only) KB4507448 (Monthly Rollup) KB4507457 (Security Only) KB4507455 (Security Update) KB4507469 (Security Update) KB4507450 (Security Update) KB4507460 (Security Update) KB4475520 (Security Update) KB4475522 (Security Update) KB4475529 (Security Update) KB4475510 (Security Update) KB4475527 (Security Update) KBRelease Notes (Security Update) KB4507420 (Monthly Rollup) KB4507411 (Security Only) KB4507422 (Monthly Rollup) KB4507413 (Security Only) KB4507421 (Monthly Rollup) KB4507412 (Security Only) KB4507423 (Monthly Rollup) KB4507414 (Security Only) KB4506987 (Security Update) KB4506986 (Security Update) KB4506989 (Security Update) KB4506988 (Security Update) KB4507419 (Security Update) KB4506991 (Security Update)

🔗 References (64)