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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7.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Microsoft Windows. It has been classified as critical. Affected is an unknown function in the library luafv.sys of the component LUAFV Driver. The manipulation leads to access control. This vulnerability is uniquely identified as CVE-2019-0730. The attack is possible to be carried out remotely. Moreover, an exploit is present. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability was found in Microsoft Windows (Operating System) and classified as critical. This issue affects an unknown code block in the library luafv.sys of the component LUAFV Driver. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is confidentiality, integrity, and availability.

The bug was discovered 04/09/2019. The weakness was disclosed 04/09/2019 with Qihoo 360 Vulcan Team as confirmed security update guide (Website). It is possible to read the advisory at portal.msrc.microsoft.com. The public release has been coordinated in cooperation with Microsoft. The identification of this vulnerability is CVE-2019-0730 since 11/26/2018. The attack may be initiated remotely. The requirement for exploitation is a simple authentication. It demands that the victim is doing some kind of user interaction. Technical details as well as a public exploit are known. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK. 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. We expect the 0-day to have been worth approximately $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†). The entries VDB-133162, VDB-133168, VDB-133177 and VDB-133179 are pretty similar. Statistical analysis made it clear that VulDB provides the best quality 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: 7.2

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

Vendor Base Score (Microsoft): 6.7
Vendor Vector (Microsoft): 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp 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: 🔍
Exposure Time: 🔍

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: 152533
Organization: Qihoo 360 Vulcan Team
Status: Confirmed
Coordinated: 🔍

CVE: CVE-2019-0730 (🔍)
GCVE (CVE): GCVE-0-2019-0730
GCVE (VulDB): GCVE-100-133187
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 07:05
Updated: 10/19/2025 21:11
Changes: 04/10/2019 07:05 (75), 05/28/2020 07:27 (5), 08/27/2023 17:37 (6), 10/19/2025 21:11 (20)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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