Privilege escalation in Microsoft Windows

Published: 2019-03-08 10:41:54 | Updated: 2019-03-12
Severity Medium
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2019-0808
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-476
Exploitation vector Local
Public exploit This vulnerability is being exploited in the wild.
Vulnerable software Windows
Windows Server
Vulnerable software versions Windows 7
Windows Server 2008
Windows Server 2008 R2 SP1
Vendor URL Microsoft

Security Advisory

UPDATED: 12.03.2019
The vendor has issued security patch to address this vulnerability.

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 in the win32k!MNGetpItemFromIndex when NtUserMNDragOver() system call within the win32k.sys kernel driver. A local user can use a specially crafted application to escape sandbox and execute arbitrary code on the target system with SYSTEM privileges.

Note, this vulnerability is being actively exploited in the wild along with vulnerability in Google Chrome described in (SB2019030405).

Remediation

Install updates from vendor's website.

External links

https://security.googleblog.com/2019/03/disclosing-vulnerabilities-to-protect.html
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0808

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