CVE-2021-34855

This vulnerability allows local attackers to disclose sensitive information on affected installations of Parallels Desktop 16.1.3 (49160). An attacker must first obtain the ability to execute low-privileged code on the target guest system in order to exploit this vulnerability. The specific flaw exists within the Toolgate component. The issue results from the lack of proper initialization of memory prior to accessing it. An attacker can leverage this in conjunction with other vulnerabilities to escalate privileges and execute arbitrary code in the context of the hypervisor. Was ZDI-CAN-13592.

CVSS v3 6.5 MEDIUM
CVSS v2.0 2.1 LOW

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.0 / Impact : 4.0

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope CHANGED

2.1^/10

CVSS v2.0 : LOW

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

Exploitability : 3.9 / Impact : 2.9

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

Link	Resource
https://kb.parallels.com/125013	Patch Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-939/	Third Party Advisory VDB Entry
https://kb.parallels.com/125013	Patch Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-21-939/	Third Party Advisory VDB Entry

Configurations

Configuration 1 (hide)

cpe:2.3:a:parallels:parallels_desktop:16.1.3:*:*:*:*:macos:*:*

History

21 Nov 2024, 06:11

Type	Values Removed	Values Added
References	~~() https://kb.parallels.com/125013 - Patch, Vendor Advisory~~	() https://kb.parallels.com/125013 - Patch, Vendor Advisory
References	~~() https://www.zerodayinitiative.com/advisories/ZDI-21-939/ - Third Party Advisory, VDB Entry~~	() https://www.zerodayinitiative.com/advisories/ZDI-21-939/ - Third Party Advisory, VDB Entry

Information

Published : 2021-10-25 17:15

Updated : 2024-11-21 06:11

NVD link : CVE-2021-34855

Mitre link : CVE-2021-34855

CVE.ORG link : CVE-2021-34855

JSON object : View

Products Affected

parallels

parallels_desktop

CWE

CWE-908

Use of Uninitialized Resource

{"id": "CVE-2021-34855", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 2.1, "accessVector": "LOCAL", "vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:N", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "LOW", "availabilityImpact": "NONE", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "LOW", "obtainAllPrivilege": false, "exploitabilityScore": 3.9, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV30": [{"type": "Secondary", "source": "zdi-disclosures@trendmicro.com", "cvssData": {"scope": "CHANGED", "version": "3.0", "baseScore": 6.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 4.0, "exploitabilityScore": 2.0}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 4.0, "exploitabilityScore": 2.0}]}, "published": "2021-10-25T17:15:08.160", "references": [{"url": "https://kb.parallels.com/125013", "tags": ["Patch", "Vendor Advisory"], "source": "zdi-disclosures@trendmicro.com"}, {"url": "https://www.zerodayinitiative.com/advisories/ZDI-21-939/", "tags": ["Third Party Advisory", "VDB Entry"], "source": "zdi-disclosures@trendmicro.com"}, {"url": "https://kb.parallels.com/125013", "tags": ["Patch", "Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.zerodayinitiative.com/advisories/ZDI-21-939/", "tags": ["Third Party Advisory", "VDB Entry"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "zdi-disclosures@trendmicro.com", "description": [{"lang": "en", "value": "CWE-908"}]}], "descriptions": [{"lang": "en", "value": "This vulnerability allows local attackers to disclose sensitive information on affected installations of Parallels Desktop 16.1.3 (49160). An attacker must first obtain the ability to execute low-privileged code on the target guest system in order to exploit this vulnerability. The specific flaw exists within the Toolgate component. The issue results from the lack of proper initialization of memory prior to accessing it. An attacker can leverage this in conjunction with other vulnerabilities to escalate privileges and execute arbitrary code in the context of the hypervisor. Was ZDI-CAN-13592."}, {"lang": "es", "value": "Esta vulnerabilidad permite a atacantes locales revelar informaci\u00f3n confidencial en las instalaciones afectadas de Parallels Desktop versi\u00f3n 16.1.3 (49160). Un atacante debe obtener primero la habilidad de ejecutar c\u00f3digo poco privilegiado en el sistema hu\u00e9sped de destino para poder explotar esta vulnerabilidad. El fallo espec\u00edfico se presenta en el componente Toolgate. El problema resulta de una falta de inicializaci\u00f3n apropiada de la memoria antes de acceder a ella. Un atacante puede aprovechar esto junto con otras vulnerabilidades para escalar privilegios y ejecutar c\u00f3digo arbitrario en el contexto del hypervisor. Fue ZDI-CAN-13592"}], "lastModified": "2024-11-21T06:11:20.747", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:parallels:parallels_desktop:16.1.3:*:*:*:*:macos:*:*", "vulnerable": true, "matchCriteriaId": "97B97F09-5AE7-47BD-82DF-47422EC15D8B"}], "operator": "OR"}]}], "sourceIdentifier": "zdi-disclosures@trendmicro.com"}