Vulnerability identifier: #VU21009

Vulnerability risk: Low

CVSSv3.1: 6.1 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-1235

CWE-ID: CWE-345

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Windows
Operating systems & Components / Operating system
Windows Server
Operating systems & Components / Operating system

Vendor: Microsoft

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due insufficient validation of input data origin within the Windows Text Service Framework (TSF) server, sent through a malicious Input Method Editor (IME). A local user can run a specially crafted application and escalate privileges on the system.

Successful exploitation of the vulnerability requires that IME is installed on the system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Windows: 7, 8.1 - 8.1 RT, 10 - 10 1903

Windows Server: 2008 - 2019 1903

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External links
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1235

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.