Privilege escalation in Microsoft Windows CLFS

1) Buffer overflow

EUVDB-ID: #VU20974

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-2019-1214

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error within the Windows Common Log File System (CLFS) driver. A local user  can create a specially crafted application and execute arbitrary code on the system with elevated privileges.

Note, this vulnerability is being actively exploited in the wild.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Windows: 7 - 10

Windows Server: 2008 R2 - 2019 1903

CPE2.3

• cpe:2.3:o:microsoft:windows:*:*:*:*:*:*:*:
• cpe:2.3:o:microsoft:windows:8.1:*:*:*:*:*:*:
• cpe:2.3:o:microsoft:windows:10 1607:10.0.14393.10:*:*:*:*:*:
• cpe:2.3:o:microsoft:windows:10 1703:10.0.15063.138:*:*:*:*:*:
• cpe:2.3:o:microsoft:windows:10 1709:10.0.16299.19:*:*:*:*:*:
• cpe:2.3:o:microsoft:windows:10 1803:10.0.17134.48:*:*:*:*:*:
• cpe:2.3:o:microsoft:windows:10 1809:10.0.17763.1:*:*:*:*:*:
• cpe:2.3:o:microsoft:windows:10 1903:10.0.18362.116:*:*:*:*:*:
• cpe:2.3:o:microsoft:windows_server:*:*:*:*:*:*:*:

External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1214

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.