Privilege escalation in Windows Win32k.sys driver

Published: 2018-11-13 20:50:44
Severity Medium
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2018-8589
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-119
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

1) Buffer overflow

Description

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

The vulnerability exists due to a boundary error within Win32k.sys driver. A local user can create a specially crafted application, run it on vulnerable system and execute code withe superuser privileges.

Note: this vulnerability is being actively exploited in limited targeted attacks.

Remediation

Install updates from vendor's website.

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8589

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