Privilege escalation in Microsoft Windows Win32k component

Published: 2019-07-09 20:07:36 | Updated: 2019-07-10
Severity Medium
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2019-1132
CVSSv3 7.5 [CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]
CWE ID CWE-476
Exploitation vector Local
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software Windows Server
Windows
Vulnerable software versions Windows Server 2008
Windows Server 2008 R2
Windows 7
Vendor URL Microsoft

Security Advisory

UPDATED: 10.07.2019

Updated description and changed CWE-ID based on data provided by ESET.

1) NULL pointer dereference

Description

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

The vulnerability exists due to a NULL pointer dereference  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-2019-1132
https://www.welivesecurity.com/2019/07/10/windows-zero-day-cve-2019-1132-exploit/

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