CVE-2019-15316

CVSS V2 Medium 6.9 CVSS V3 High 7
Description
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.
Overview
  • CVE ID
  • CVE-2019-15316
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2019-08-21T20:15:12
  • Last Modified Date
  • 2020-08-24T17:37:01
Weakness Enumerations
CWE URL
CWE-367 http://cwe.mitre.org/data/definitions/367.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
AND
cpe:2.3:a:valvesoftware:steam_client:*:*:*:*:*:*:*:* 1 OR 2019-08-20
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* 0 OR
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:L/AC:M/Au:N/C:C/I:C/A:C
  • Access Vector
  • LOCAL
  • Access Compatibility
  • MEDIUM
  • Authentication
  • NONE
  • Confidentiality Impact
  • COMPLETE
  • Integrity Impact
  • COMPLETE
  • Availability Impact
  • COMPLETE
  • Base Score
  • 6.9
  • Severity
  • MEDIUM
  • Exploitability Score
  • 3.4
  • Impact Score
  • 10
CVSS Version 3
  • Version
  • 3.0
  • Vector String
  • CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  • Attack Vector
  • LOCAL
  • Attack Compatibility
  • HIGH
  • Privileges Required
  • LOW
  • User Interaction
  • NONE
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • HIGH
  • Base Score
  • 7
  • Base Severity
  • HIGH
  • Exploitability Score
  • 1
  • Impact Score
  • 5.9
References
Reference URL Reference Tags
https://habr.com/ru/company/pm/blog/464367/ Third Party Advisory
https://www.youtube.com/watch?v=ZCHrjP0cMew Exploit Third Party Advisory
https://amonitoring.ru/article/onemore_steam_eop_0day/ Third Party Advisory
https://www.youtube.com/watch?v=I93aH86BUaE Exploit Third Party Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2019-15316
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-15316
History
Created Old Value New Value Data Type Notes
2022-05-10 16:35:38 Added to TrackCVE
2022-12-04 01:39:43 2019-08-21T20:15Z 2019-08-21T20:15:12 CVE Published Date updated
2022-12-04 01:39:43 2020-08-24T17:37:01 CVE Modified Date updated
2022-12-04 01:39:43 Analyzed Vulnerability Status updated