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Category:   Application (Generic)  >   Microsoft .NET Vendors:   Microsoft
Microsoft .NET Multiple Flaws Let Remote Users Execute Arbitrary Code and Local Users Bypass Security and Gain Elevated Privileges
SecurityTracker Alert ID:  1041257
SecurityTracker URL:  http://securitytracker.com/id/1041257
CVE Reference:   CVE-2018-8202, CVE-2018-8260, CVE-2018-8284, CVE-2018-8356   (Links to External Site)
Date:  Jul 10 2018
Impact:   Execution of arbitrary code via network, User access via local system, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2.0 SP2, 3.5, 3.5.1, 4.5.2, 4.6, 4.7.2 Developer Pack; .NET Core 1.0, 1.1, 2.0; ASP.NET Core 1.0, 1.1, 2.0;
Description:   Several vulnerabilities were reported in Microsoft .NET. A remote user can cause arbitrary code to be executed on the target user's system. A local user can obtain elevated privileges on the target system. A local user can bypass security restrictions.

A local user can run a specially crafted application to exploit a flaw in the activation of COM objects and gain elevated privileges [CVE-2018-8202].

A local user can present an expired certificate to bypass certificate validation on the target system [CVE-2018-8356].

A remote user can create a specially crafted file that, when opened by the target user via .NET, will trigger a flaw in the validation of source markup and execute arbitrary code [CVE-2018-8260].

A remote user can create a specially crafted file that, when opened by the target user via .NET, will trigger an input validation flaw and execute arbitrary code [CVE-2018-8284].

Lasse Trolle Borup of Langkjaer Cyber Defence and Soroush Dalili of NCC Group reported some of these vulnerabilities.

Impact:   A remote user can create content that, when loaded by the target user, will execute arbitrary code on the target user's system.

A local user can obtain elevated privileges on the target system.

A local user can bypass security controls 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-2018-8202
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8260
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8284
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8356

Vendor URL:  portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8202 (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.


 Source Message Contents



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