Privilege escalation in Windows IME

Published: 2017-08-08 21:00:03
Severity Low
Patch available YES
Number of vulnerabilities 1
CVSSv2 1.6 (AV:L/AC:L/Au:N/C:N/I:N/A:P/E:U/RL:OF/RC:C)
CVSSv3 4.7 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE ID CVE-2017-8591
CWE ID CWE-20
Exploitation vector Local
Public exploit Not available
Vulnerable software Windows
Windows Server
Vulnerable software versions Windows 8.1
Windows 10
Windows RT 8.1
Windows Server 2012
Windows Server 2012 R2
Windows Server 2016
Vendor URL Microsoft
Advisory type Public

Security Advisory

1) Improper input validation

Description

The vulnerability allows a local user to execute arbitrary code with elevated privileges.

The vulnerability exists due to an error in Windows Input Method Editor (IME) when IME improperly handles parameters in a method of a DCOM class. A local user can instantiate the DCOM class and execute arbitrary code with elevated privileges.

Remediation

Install updates from vendor's website.

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8591

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