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Category:   Application (Generic)  >   ASP.NET Vendors:   Microsoft
Microsoft ASP.NET Bugs Let Remote Users Deny Service, Obtain Potentially Sensitive Information, and Redirect the Target User to An Arbitrary Site
SecurityTracker Alert ID:  1039793
SecurityTracker URL:  http://securitytracker.com/id/1039793
CVE Reference:   CVE-2017-11879, CVE-2017-11883, CVE-2017-8700   (Links to External Site)
Date:  Nov 14 2017
Impact:   Denial of service via network, Disclosure of system information, Disclosure of user information, Modification of system information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): ASP.NET Core 1.1, ASP.NET Core 1.0, ASP.NET Core 2.0
Description:   Several vulnerabilities were reported in Microsoft ASP.NET. A remote user can cause denial of service conditions on the target system. A remote user can redirect the target user's browser to an arbitrary site. A remote user can obtain potentially sensitive information on the target system.

A remote user can send specially crafted data to the target .NET Core application to cause denial of service conditions on the target .NET Core application [CVE-2017-11883]. Versions 1.0 and 1.1 are affected.

A remote user can send a specially crafted request to bypass Cross-origin Resource Sharing (CORS) restrictions and obtain potentially sensitive information from the target application [CVE-2017-8700]. Versions 1.0 and 1.1 are affected.

A remote user can create a URL that, when loaded by the target user, will redirect the target user's browser to an arbitrary site [CVE-2017-11879].

Kevin Chalet reported one vulnerability.

Impact:   A remote user can cause denial of service conditions.

A remote user can cause the target user's browser to be redirected to an arbitrary web site.

A remote user can obtain potentially sensitive information on the target system.

Solution:   The vendor has issued a fix.

The Microsoft advisories are available at:

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11879
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11883
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8700

Vendor URL:  portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8700 (Links to External Site)
Cause:   Access control error, Input validation error
Underlying OS:  Windows (2008), Windows (2012), Windows (2016), Windows (7), Windows (8), Windows (10)

Message History:   None.


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