Multiple vulnerabilities in Microsoft Win32k

Published: 2020-05-12

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2020-1054 CVE-2020-1143
CWE-ID	CWE-119
Exploitation vector	Local
Public exploit	Vulnerability #1 is being exploited in the wild.
Vulnerable software	Windows Operating systems & Components / Operating system Windows Server Operating systems & Components / Operating system
Vendor	Microsoft

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Buffer overflow

EUVDB-ID: #VU27819

Risk: Low

CVSSv4.0: 7.3 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Clear]

CVE-ID: CVE-2020-1054

CWE-ID: CWE-119 - Memory corruption

Exploit availability: Yes

Description

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

The vulnerability exists due to a boundary error when processing objects in memory within the Windows kernel-mode driver. A local user can create a malicious application, launch it on the system and execute arbitrary code with SYSTEM privileges.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Windows: 7 - 10 1909 10.0.18363.476

Windows Server: 2008 - 2019 1909

CPE2.3

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1054

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?

Yes. This vulnerability is being exploited in the wild.

2) Buffer overflow

EUVDB-ID: #VU27820