SB2019030802 - Privilege escalation in Microsoft Windows

Description

This security bulletin contains information about 1 security vulnerability.

1) NULL pointer dereference (CVE-ID: CVE-2019-0808)

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 update from vendor's website.

References

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