Microsoft Windows up to Server 2019 LUAFV Driver luafv.sys access control

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability was found in Microsoft Windows. It has been declared as critical. Affected by this vulnerability is an unknown functionality in the library luafv.sys of the component LUAFV Driver. The manipulation results in access control. This vulnerability was named CVE-2019-0731. The attack may be performed from remote. In addition, an exploit is available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in Microsoft Windows (Operating System). It has been classified as critical. Affected is some unknown processing in the library luafv.sys of the component LUAFV Driver. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-264. This is going to have an impact on confidentiality, integrity, and availability.

The bug was discovered 04/09/2019. The weakness was presented 04/09/2019 with Qihoo 360 Vulcan Team as confirmed security update guide (Website). The advisory is shared for download at portal.msrc.microsoft.com. The public release was coordinated in cooperation with the vendor. This vulnerability is traded as CVE-2019-0731 since 11/26/2018. It is possible to launch the attack remotely. Required for exploitation is a authentication. Successful exploitation requires user interaction by the victim. Technical details and a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1068. The advisory points out:

An elevation of privilege vulnerability exists when Windows improperly handles calls to the LUAFV driver (luafv.sys). An attacker who successfully exploited this vulnerability could run arbitrary code in the security context of the local system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.

It is declared as proof-of-concept. As 0-day the estimated underground price was around $25k-$100k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 91522 (Microsoft Windows Security Update for April 2019).

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 107702†). See VDB-133162, VDB-133168, VDB-133177 and VDB-133179 for similar entries. Once again VulDB remains the best source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.3

VulDB Base Score: 8.0
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 6.8
Vendor Vector (Microsoft): 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
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Timelineinfo

11/26/2018 🔍
04/09/2019 +134 days 🔍
04/09/2019 +0 days 🔍
04/09/2019 +0 days 🔍
04/09/2019 +0 days 🔍
04/10/2019 +1 days 🔍
10/19/2025 +2384 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: 152534
Organization: Qihoo 360 Vulcan Team
Status: Confirmed
Coordinated: 🔍

CVE: CVE-2019-0731 (🔍)
GCVE (CVE): GCVE-0-2019-0731
GCVE (VulDB): GCVE-100-133188
SecurityFocus: 107702 - Microsoft Windows MS XML CVE-2019-0790 Remote Code Execution Vulnerability

scip Labs: https://www.scip.ch/en/?labs.20161215
See also: 🔍

Entryinfo

Created: 04/10/2019 07:08
Updated: 10/19/2025 21:11
Changes: 04/10/2019 07:08 (76), 05/28/2020 07:42 (5), 08/27/2023 17:44 (6), 10/19/2025 21:11 (21)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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