CVE-2018-0803

Microsoft Edge Elevation of Privilege Vulnerability

CVE-2018-0803 is fixed in 11 products on 1 platform, first by KB4056888, released January 3, 2018. It is not reported as exploited. Patch Radar priority: Routine.

Routine
CVSS
3.1
Important
Exploitation
None reported
Exploitation Unlikely
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0366
89th percentile

<p>An elevation of privilege vulnerability exists when Microsoft Edge does not properly enforce cross-domain policies, which could allow an attacker to access information from one domain and inject it into another domain.</p> <p>In a web-based attack scenario, an attacker could host a website that is used to attempt to exploit the vulnerability. In addition, compromised websites and websites that accept or host user-provided content could contain specially crafted content that could exploit the vulnerability. However, in all cases an attacker would have no way to force users to view the attacker-controlled content. Instead, an attacker would have to convince users to take action. For example, an attacker could trick users into clicking a link that takes them to the attacker's site. An attacker who successfully exploited this vulnerability could elevate privileges in affected versions of Microsoft Edge.</p> <p>The security update addresses the vulnerability by helping to ensure that cross-domain policies are properly enforced in Microsoft Edge.</p>

Where it's fixed

ProductFixed inFixReleased
Microsoft
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1511 for 32-bit Systems 10586.1356 KB4056888 Jan 3, 2018
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1511 for x64-based Systems 10586.1356 KB4056888 Jan 3, 2018
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1607 for 32-bit Systems 14393.2007 KB4056890 Jan 3, 2018
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1607 for x64-based Systems 14393.2007 KB4056890 Jan 3, 2018
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1703 for 32-bit Systems 15063.850 KB4056891 Jan 3, 2018
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1703 for x64-based Systems 15063.850 KB4056891 Jan 3, 2018
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for 32-bit Systems 16299.192 KB4056892 Jan 3, 2018
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for x64-based Systems 16299.192 KB4056892 Jan 3, 2018
Microsoft Edge (EdgeHTML-based) on Windows 10 for 32-bit Systems 10240.17738 KB4056893 Jan 3, 2018
Microsoft Edge (EdgeHTML-based) on Windows 10 for x64-based Systems 10240.17738 KB4056893 Jan 3, 2018
Microsoft Edge (EdgeHTML-based) on Windows Server 2016 14393.2007 KB4056890 Jan 3, 2018