Valve Steam Client up to 2019-08-20 on Windows CreateMountPoint.exe access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.1$0-$5k0.00

Summaryinfo

A vulnerability was found in Valve Steam Client up to 2019-08-20 on Windows. It has been classified as critical. This issue affects some unknown processing of the file CreateMountPoint.exe. This manipulation causes access control. This vulnerability is handled as CVE-2019-15316. It is possible to launch the attack on the local host. There is not any exploit available.

Detailsinfo

A vulnerability was found in Valve Steam Client up to 2019-08-20 on Windows. It has been declared as critical. Affected by this vulnerability is an unknown code block of the file CreateMountPoint.exe. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Valve Steam Client for Windows through 2019-08-20 has weak folder permissions, leading to privilege escalation (to NT AUTHORITY\SYSTEM) via crafted use of CreateMountPoint.exe and SetOpLock.exe to leverage a TOCTOU race condition.

The weakness was released 08/21/2019. This vulnerability is known as CVE-2019-15316 since 08/21/2019. Attacking locally is a requirement. The requirement for exploitation is a single authentication. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Entry connected to this vulnerability is available at VDB-140550. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.1
VulDB Meta Temp Score: 6.1

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

NVD Base Score: 7.0
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/21/2019 🔍
08/21/2019 +0 days 🔍
08/22/2019 +1 days 🔍
11/28/2023 +1559 days 🔍

Sourcesinfo

Advisory: amonitoring.ru
Status: Not defined

CVE: CVE-2019-15316 (🔍)
GCVE (CVE): GCVE-0-2019-15316
GCVE (VulDB): GCVE-100-140551
See also: 🔍

Entryinfo

Created: 08/22/2019 09:31
Updated: 11/28/2023 11:24
Changes: 08/22/2019 09:31 (37), 08/02/2020 16:30 (17), 11/28/2023 11:24 (3)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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