CVE-2021-30481

Valve Steam through 2021-04-10, when a Source engine game is installed, allows remote authenticated users to execute arbitrary code because of a buffer overflow that occurs for a Steam invite after one click.

CVSS v3 9.0 CRITICAL
CVSS v2.0 6.0 MEDIUM

9.0^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 2.3 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

6.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:M/Au:S/C:P/I:P/A:P

Exploitability : 6.8 / Impact : 6.4

Access Vector NETWORK

Access Complexity MEDIUM

Authentication SINGLE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://news.ycombinator.com/item?id=26762170	Issue Tracking Third Party Advisory
https://twitter.com/floesen_/status/1337107178096881666	Third Party Advisory
https://twitter.com/the_secret_club/status/1380868759129296900	Exploit Third Party Advisory
https://www.youtube.com/watch?v=rNQn--9xR1Q	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

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

History

07 Feb 2022, 19:09

Type	Values Removed	Values Added
CPE	cpe:2.3:a:valvesoftware:steam::::::::	cpe:2.3:a:valvesoftware:steam_client::::::::

Information

Published : 2021-04-10 19:15

Updated : 2024-02-04 21:47

NVD link : CVE-2021-30481

Mitre link : CVE-2021-30481

CVE.ORG link : CVE-2021-30481

JSON object : View

Products Affected

valvesoftware

steam_client

CWE

CWE-120

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

{"id": "CVE-2021-30481", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 6.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:M/Au:S/C:P/I:P/A:P", "authentication": "SINGLE", "integrityImpact": "PARTIAL", "accessComplexity": "MEDIUM", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 6.4, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 6.8, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": true}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.0, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 2.3}, {"type": "Secondary", "source": "cve@mitre.org", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.0, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 1.3}]}, "published": "2021-04-10T19:15:11.707", "references": [{"url": "https://news.ycombinator.com/item?id=26762170", "tags": ["Issue Tracking", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://twitter.com/floesen_/status/1337107178096881666", "tags": ["Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://twitter.com/the_secret_club/status/1380868759129296900", "tags": ["Exploit", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://www.youtube.com/watch?v=rNQn--9xR1Q", "tags": ["Exploit", "Third Party Advisory"], "source": "cve@mitre.org"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-120"}]}], "descriptions": [{"lang": "en", "value": "Valve Steam through 2021-04-10, when a Source engine game is installed, allows remote authenticated users to execute arbitrary code because of a buffer overflow that occurs for a Steam invite after one click."}, {"lang": "es", "value": "Valve Steam hasta el 10-04-2021, cuando un juego del motor de Origen es instalado, permite a usuarios autenticados remotos ejecutar c\u00f3digo arbitrario debido a un desbordamiento del b\u00fafer que ocurre para una invitaci\u00f3n de Steam despu\u00e9s de un clic"}], "lastModified": "2022-02-07T19:09:13.950", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:valvesoftware:steam_client:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3F4F455F-5897-4F4D-B3BE-8CF1CEDB1627", "versionEndIncluding": "2021-04-10"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}