Advisory Details

August 8th, 2017

Microsoft Edge XAML File Improper Access Control Privilege Escalation Vulnerability

CVE ID	CVE-2017-8503
CVSS SCORE	3.7, AV:L/AC:H/Au:N/C:P/I:P/A:P
AFFECTED VENDORS	Microsoft
AFFECTED PRODUCTS	Edge
VULNERABILITY DETAILS	This vulnerability allows remote attackers to escalate privileges on vulnerable installations of Microsoft Edge. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the handling of XAML files. When an XAML file is downloaded, Microsoft Edge does not set appropriate file permissions. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the current user at medium integrity.
ADDITIONAL DETAILS	Microsoft has issued an update to correct this vulnerability. More details can be found at: https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8503
DISCLOSURE TIMELINE	2017-02-01 - Vulnerability reported to vendor 2017-08-08 - Coordinated public release of advisory
CREDIT	Thomas Vanhoutte

BACK TO ADVISORIES