Microsoft Windows up to Server 2019 PsmServiceExtHost.dll access control

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Microsoft Windows up to Server 2019. The impacted element is an unknown function in the library PsmServiceExtHost.dll. The manipulation results in access control. This vulnerability was named CVE-2019-1173. The attack needs to be approached locally. There is no available exploit. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability was found in Microsoft Windows up to Server 2019 (Operating System). It has been classified as critical. Affected is an unknown functionality in the library PsmServiceExtHost.dll. 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. CVE summarizes:

An elevation of privilege vulnerability exists in the way that the PsmServiceExtHost.dll handles objects in memory. An attacker who successfully exploited the vulnerability could execute code with elevated permissions. To exploit the vulnerability, a locally authenticated attacker could run a specially crafted application. The security update addresses the vulnerability by ensuring the PsmServiceExtHost.dll properly handles objects in memory.

The weakness was presented 08/13/2019 as confirmed security update guide (Website). The advisory is available at portal.msrc.microsoft.com. The public release was coordinated in cooperation with the vendor. This vulnerability is traded as CVE-2019-1173 since 11/26/2018. Local access is required to approach this attack. The successful exploitation needs a authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1068 by the MITRE ATT&CK project. The advisory points out:

An elevation of privilege vulnerability exists in the way that the PsmServiceExtHost.dll handles objects in memory. An attacker who successfully exploited the vulnerability could execute code with elevated permissions.

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

See VDB-139942, VDB-139941, VDB-139940 and VDB-139939 for similar entries. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.7

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 7.0
Vendor Vector (Microsoft): 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CNA Base Score: 7.0
CNA Vector: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

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

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

11/26/2018 🔍
08/13/2019 +260 days 🔍
08/13/2019 +0 days 🔍
08/14/2019 +1 days 🔍
02/21/2026 +2382 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: portal.msrc.microsoft.com
Status: Confirmed
Coordinated: 🔍

CVE: CVE-2019-1173 (🔍)
GCVE (CVE): GCVE-0-2019-1173
GCVE (VulDB): GCVE-100-139938
scip Labs: https://www.scip.ch/en/?labs.20161215
See also: 🔍

Entryinfo

Created: 08/14/2019 13:11
Updated: 02/21/2026 00:41
Changes: 08/14/2019 13:11 (71), 07/27/2020 09:46 (1), 02/21/2026 00:41 (28)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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