Vulnerability identifier: #VU17930
Vulnerability risk: Medium
CVSSv3.1: 8.4 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-476
Exploitation vector: Local
Exploit availability: Yes
Vulnerable software:
Windows
Operating systems & Components /
Operating system
Windows Server
Operating systems & Components /
Operating system
Vendor: Microsoft
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).
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Windows: 7
Windows Server: 2008 - 2008 R2 SP1
External links
http://security.googleblog.com/2019/03/disclosing-vulnerabilities-to-protect.html
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0808
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.