Privilege escalation in Microsoft Windows Win32k component



Published: 2019-07-09 | Updated: 2019-07-10
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2019-1132
CWE-ID CWE-476
Exploitation vector Local
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software
Subscribe 		Windows Server
Operating systems & Components / Operating system

Windows
Operating systems & Components / Operating system

Vendor Microsoft

Security Bulletin

This security bulletin contains information about 1 vulnerabilities.

UPDATED: 10.07.2019

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

1) NULL pointer dereference

EUVDB-ID: #VU19062

Risk: Medium

CVSSv3.1: 7.5 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2019-1132

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: Yes

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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Windows Server: 2008 - 2008 R2

Windows: 7

CPE2.3 External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1132
http://www.welivesecurity.com/2019/07/10/windows-zero-day-cve-2019-1132-exploit/


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.



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