CVE-2020-15530

An issue was discovered in Valve Steam Client 2.10.91.91. The installer allows local users to gain NT AUTHORITY\SYSTEM privileges because some parts of %PROGRAMFILES(X86)%\Steam and/or %COMMONPROGRAMFILES(X86)%\Steam have weak permissions during a critical time window. An attacker can make this time window arbitrarily long by using opportunistic locks.

CVSS v3 7.8 HIGH
CVSS v2.0 7.2 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.2^/10

CVSS v2.0 : HIGH

Vector : AV:L/AC:L/Au:N/C:C/I:C/A:C

Exploitability : 3.9 / Impact : 10.0

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
http://daniels-it-blog.blogspot.com/2020/07/steam-arbitrary-code-execution-part-2.html	Exploit Third Party Advisory
http://daniels-it-blog.blogspot.com/2020/07/steam-arbitrary-code-execution-part-2.html	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:valvesoftware:steam_client:2.10.91.91:*:*:*:*:*:*:*

History

21 Nov 2024, 05:05

Type	Values Removed	Values Added
References	~~() http://daniels-it-blog.blogspot.com/2020/07/steam-arbitrary-code-execution-part-2.html - Exploit, Third Party Advisory~~	() http://daniels-it-blog.blogspot.com/2020/07/steam-arbitrary-code-execution-part-2.html - Exploit, Third Party Advisory

Information

Published : 2020-07-05 01:15

Updated : 2024-11-21 05:05

NVD link : CVE-2020-15530

Mitre link : CVE-2020-15530

CVE.ORG link : CVE-2020-15530

JSON object : View

Products Affected

valvesoftware

steam_client

CWE

CWE-362

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

{"id": "CVE-2020-15530", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 7.2, "accessVector": "LOCAL", "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C", "authentication": "NONE", "integrityImpact": "COMPLETE", "accessComplexity": "LOW", "availabilityImpact": "COMPLETE", "confidentialityImpact": "COMPLETE"}, "acInsufInfo": false, "impactScore": 10.0, "baseSeverity": "HIGH", "obtainAllPrivilege": false, "exploitabilityScore": 3.9, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "published": "2020-07-05T01:15:10.790", "references": [{"url": "http://daniels-it-blog.blogspot.com/2020/07/steam-arbitrary-code-execution-part-2.html", "tags": ["Exploit", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "http://daniels-it-blog.blogspot.com/2020/07/steam-arbitrary-code-execution-part-2.html", "tags": ["Exploit", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-362"}]}], "descriptions": [{"lang": "en", "value": "An issue was discovered in Valve Steam Client 2.10.91.91. The installer allows local users to gain NT AUTHORITY\\SYSTEM privileges because some parts of %PROGRAMFILES(X86)%\\Steam and/or %COMMONPROGRAMFILES(X86)%\\Steam have weak permissions during a critical time window. An attacker can make this time window arbitrarily long by using opportunistic locks."}, {"lang": "es", "value": "Se detect\u00f3 un problema en Valve Steam Client 2.10.91.91. El instalador permite a usuarios locales obtener privilegios NT AUTHORITY\\SYSTEM porque algunas partes de %PROGRAMFILES(X86)%\\Steam y/o %COMMONPROGRAMFILES(X86)%\\Steam presentan permisos d\u00e9biles durante una ventana de tiempo cr\u00edtica. Un atacante puede hacer que esta ventana de tiempo sea arbitrariamente larga usando bloqueos oportunistas"}], "lastModified": "2024-11-21T05:05:42.240", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:valvesoftware:steam_client:2.10.91.91:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "30EC9032-8AAD-4B1D-A787-612469F59DB1"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}