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Privilege escalation in Microsoft Windows Text Service Framework



Published: 2020-06-10
Severity Low
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2020-1314
CWE ID CWE-119
Exploitation vector Local
Public exploit N/A
Vulnerable software
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Windows
Operating systems & Components / Operating system

Windows Server
Operating systems & Components / Operating system

Vendor Microsoft

Security Advisory

This security advisory describes one low risk vulnerability.

1) Buffer overflow

Severity: Low

CVSSv3: 6.1 [CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-1314

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Exploit availability: No

Description

The vulnerability allows a local user to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in Windows Text Service Framework (TSF) when the TSF server fails to properly handle messages sent from TSF clients. A local user can use a specially crafted application, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows: 7, 8.1, 10, 10 1607, 10 1709, 10 1803, 10 1809, 10 1903, 10 1909, 10 2004, RT 8.1

Windows Server: 2008, 2008 R2, 2012, 2012 R2, 2016, 2019, 2019 1803, 2019 1903, 2019 1909, 2019 2004

CPE External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1314

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.