CVE-2016-3387

Microsoft Browser Elevation of Privilege Vulnerability

CVE-2016-3387 is fixed in 17 products on 1 platform, first by KB3192441, released October 11, 2016. It is not reported as exploited, but the vendor rates exploitation more likely. Patch Radar priority: Urgent.

Urgent
CVSS
n/a
Important
Exploitation
More likely
Vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.1993
97th percentile

<p>An elevation of privilege vulnerability exists when affected Microsoft browsers fail to properly secure private namespace. An attacker who successfully exploited this vulnerability could gain elevated permissions on the namespace directory of a vulnerable system and gain elevated privileges.</p> <p>The vulnerability by itself does not allow arbitrary code to be run. However, this vulnerability could be used in conjunction with one or more other vulnerabilities (e.g. a remote code execution vulnerability and another elevation of privilege) that could take advantage of the elevated privileges when running.</p> <p>The update addresses the vulnerability by correcting how Microsoft browsers handle namespace boundaries.</p>

Where it's fixed

ProductFixed inFixReleased
Microsoft
Internet Explorer 10 on Windows Server 2012 KB3185332 Oct 11, 2016
Internet Explorer 10 on Windows Server 2012 KB3192393 Oct 11, 2016
Internet Explorer 11 on Windows 10 Version 1511 for 32-bit Systems 10586.633 KB3192441 Oct 11, 2016
Internet Explorer 11 on Windows 10 Version 1511 for x64-based Systems 10586.633 KB3192441 Oct 11, 2016
Internet Explorer 11 on Windows 10 Version 1607 for 32-bit Systems 14393.321 KB3194798 Oct 11, 2016
Internet Explorer 11 on Windows 10 Version 1607 for x64-based Systems 14393.321 KB3194798 Oct 11, 2016
Internet Explorer 11 on Windows 10 for 32-bit Systems 10240.17146 KB3192440 Oct 11, 2016
Internet Explorer 11 on Windows 10 for x64-based Systems 10240.17146 KB3192440 Oct 11, 2016
Internet Explorer 11 on Windows 8.1 for 32-bit systems KB3192392 Oct 11, 2016
Internet Explorer 11 on Windows 8.1 for 32-bit systems KB3185331 Oct 11, 2016
Internet Explorer 11 on Windows 8.1 for x64-based systems KB3192392 Oct 11, 2016
Internet Explorer 11 on Windows 8.1 for x64-based systems KB3185331 Oct 11, 2016
Internet Explorer 11 on Windows RT 8.1 KB3185331 Oct 11, 2016
Internet Explorer 11 on Windows Server 2012 R2 KB3192392 Oct 11, 2016
Internet Explorer 11 on Windows Server 2012 R2 KB3185331 Oct 11, 2016
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1511 for 32-bit Systems 10586.633 KB3192441 Oct 11, 2016
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1511 for x64-based Systems 10586.633 KB3192441 Oct 11, 2016
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1607 for 32-bit Systems 14393.321 KB3194798 Oct 11, 2016
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1607 for x64-based Systems 14393.321 KB3194798 Oct 11, 2016
Microsoft Edge (EdgeHTML-based) on Windows 10 for 32-bit Systems 10240.17146 KB3192440 Oct 11, 2016
Microsoft Edge (EdgeHTML-based) on Windows 10 for x64-based Systems 10240.17146 KB3192440 Oct 11, 2016