Privilege escalation in Win32k.sys driver in Microsoft Windows

Published: 2019-04-09 23:38:28 | Updated: 2019-04-09
Severity Medium
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2019-0859
CVSSv3 8.4 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C]
CWE ID CWE-119
Exploitation vector Local
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software Windows
Windows Server
Vulnerable software versions Windows 8.1
Windows 7
Windows 10

Show more

Windows Server 2012
Windows Server 2012 R2
Windows Server 2008

Show more

Vendor URL Microsoft

Security Advisory

1) Buffer overflow

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 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.

Remediation

Install update from vendor's website.

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0859

Back to List