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Category:   Application (Web Browser)  >   Microsoft Internet Explorer Vendors:   Microsoft
Microsoft Internet Explorer Flaws Let Remote Users Bypass UMCI Policy and Execute Arbitrary Code
SecurityTracker Alert ID:  1040846
SecurityTracker URL:  http://securitytracker.com/id/1040846
CVE Reference:   CVE-2018-0955, CVE-2018-8114, CVE-2018-8122, CVE-2018-8126   (Links to External Site)
Updated:  May 8 2018
Original Entry Date:  May 8 2018
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 9, 10, 11
Description:   Several vulnerabilities were reported in Microsoft Internet Explorer. A remote user can cause arbitrary code to be executed on the target user's system. A remote user can bypass security controls on the target system.

A remote user can create specially crafted content that, when loaded by the target user, will trigger an object memory handling error and execute arbitrary code on the target user's system [CVE-2018-0955].

A remote user can create specially crafted content that, when loaded by the target user, will trigger an object memory handling error and execute arbitrary code on the target user's system [CVE-2018-8114, CVE-2018-8122]. This can be exploited via an embedded ActiveX control marked "safe for initialization" in an application or Microsoft Office document that hosts the Internet Explorer (IE) rendering engine. Version 11 is affected.

A remote user can create specially crafted content that, when loaded by the target user, will bypass Device Guard User Mode Code Integrity (UMCI) policies on the target user's system [CVE-2018-8126]. Version 11 is affected.

Matt Nelson (@enigma0x3) of SpecterOps and Yuki Chen of Qihoo 360 Vulcan Team reported 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 remote 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-2018-0955
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8114
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8122
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8126

Vendor URL:  portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8126 (Links to External Site)
Cause:   Access control error
Underlying OS:  Windows (Any)

Message History:   None.


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