Privilege escalation in Win32k.sys driver in Microsoft Windows



Published: 2019-04-09
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-0803
CWE-ID CWE-119
Exploitation vector Local
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software
Subscribe 		Windows
Operating systems & Components / Operating system

Windows Server
Operating systems & Components / Operating system

Vendor Microsoft

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Buffer overflow

EUVDB-ID: #VU18159

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2019-0803

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

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 Microsoft Graphics Win32k component. A local user can create a malicious application, launch it on the system and execute arbitrary code with SYSTEM privileges.

Note: this vulnerability is being actively exploited in the wild.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Windows: 7 - 10 1809

Windows Server: 2008 - 2019 1803

CPE2.3 External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0803

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?



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