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Microsoft Internet Information Services (IIS) Elevation of Privilege Vulnerability

Microsoft Internet Information Services (IIS) Elevation of Privilege Vulnerability


Fortinet’s FortiGuard Global Security Research Team investigates an elevation of privilege vulnerability in Microsoft Internet Information Services (IIS).


Elevation of privilege.

Affected Software:

  • Microsoft Internet Information Services 5.0
  • Microsoft Internet Information Services 5.1
  • Microsoft Internet Information Services 6.0


  • The FortiGuard Global Security Research Team released a signature “MS.IIS.6.WebDAV.Authentication.Bypass”, which covers this specific vulnerability.

Fortinet customers who subscribe to Fortinet¡¦s intrusion prevention (IPS) service should be protected against this memory corruption vulnerability. Fortinet¡¦s IPS service is one component of FortiGuard Subscription Services, which also offer comprehensive solutions such as antivirus, Web content filtering and antispam capabilities. These services enable protection against threats on both application and network layers. FortiGuard Services are continuously updated by the FortiGuard Global Security Research Team, which enables Fortinet to deliver a combination of multi-layered security intelligence and true zero-day protection from new and emerging threats. These updates are delivered to all FortiGate, FortiMail and FortiClient products. Fortinet strictly follows responsible disclosure guidelines to ensure optimum protection during a threat’s lifecycle.



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