CVE-2025-34352

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The Remote Assist uninstaller performs privileged create, write, execute, and delete actions on predictable files inside a user-writable %TEMP% subdirectory without validating that the directory is trusted or resetting its ACLs when it already exists. A local, low-privileged attacker can pre-create the directory with weak permissions and leverage mount-point or symbolic-link redirection to (a) coerce arbitrary file writes to protected locations, leading to denial of service (e.g., by overwriting sensitive system files), or (b) win a race to redirect DeleteFileW() to attacker-chosen targets, enabling arbitrary file or folder deletion and local privilege escalation to SYSTEM. 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A local, low-privileged attacker can pre-create the directory with weak permissions and leverage mount-point or symbolic-link redirection to (a) coerce arbitrary file writes to protected locations, leading to denial of service (e.g., by overwriting sensitive system files), or (b) win a race to redirect DeleteFileW() to attacker-chosen targets, enabling arbitrary file or folder deletion and local privilege escalation to SYSTEM. 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A local, low-privileged attacker can pre-create the directory with weak permissions and leverage mount-point or symbolic-link redirection to (a) coerce arbitrary file writes to protected locations, leading to denial of service (e.g., by overwriting sensitive system files), or (b) win a race to redirect DeleteFileW() to attacker-chosen targets, enabling arbitrary file or folder deletion and local privilege escalation to SYSTEM. This issue is fixed in JumpCloud Remote Assist 0.317.0 and affects Windows systems where Remote Assist is installed and managed through the Agent lifecycle."}, {"lang": "es", "value": "JumpCloud Remote Assist para Windows versiones anteriores a 0.317.0 incluye un desinstalador que es invocado por el Agente de Windows de JumpCloud como NT AUTHORITY\\SYSTEM durante operaciones de desinstalaci\u00f3n o actualizaci\u00f3n del agente. El desinstalador de Remote Assist realiza acciones privilegiadas de creaci\u00f3n, escritura, ejecuci\u00f3n y eliminaci\u00f3n en archivos predecibles dentro de un subdirectorio %TEMP% escribible por el usuario sin validar que el directorio sea de confianza o restablecer sus ACL cuando ya existe. Un atacante local con pocos privilegios puede pre-crear el directorio con permisos d\u00e9biles y aprovechar la redirecci\u00f3n de puntos de montaje o enlaces simb\u00f3licos para (a) forzar escrituras de archivos arbitrarias en ubicaciones protegidas, lo que lleva a una denegaci\u00f3n de servicio (por ejemplo, sobrescribiendo archivos de sistema sensibles), o (b) ganar una carrera para redirigir DeleteFileW() a objetivos elegidos por el atacante, lo que permite la eliminaci\u00f3n arbitraria de archivos o carpetas y la escalada de privilegios local a SYSTEM. Este problema est\u00e1 solucionado en JumpCloud Remote Assist 0.317.0 y afecta a los sistemas Windows donde Remote Assist est\u00e1 instalado y gestionado a trav\u00e9s del ciclo de vida del Agente."}], "id": "CVE-2025-34352", "lastModified": "2026-10-18T18:10:00.100", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.5, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "disclosure@vulncheck.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2025-34352", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2025-12-02T19:01:02.992023Z", "version": "2.0.3"}}]}, "published": "2025-12-02T19:15:49.360", "references": [{"source": "disclosure@vulncheck.com", "url": "https://jumpcloud.com/platform/remote-assistance"}, {"source": "disclosure@vulncheck.com", "url": "https://jumpcloud.com/support/list-of-jumpcloud-agent-release-notes"}, {"source": "disclosure@vulncheck.com", "url": "https://www.vulncheck.com/advisories/jumpcloud-remote-assist-arbitrary-file-write-delete-via-insecure-temp-directory"}], "sourceIdentifier": "disclosure@vulncheck.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-59"}, {"lang": "en", "value": "CWE-378"}], "source": "disclosure@vulncheck.com", "type": "Secondary"}]}

{}

{"created": "2025-12-04T16:44:40.266632+00:00", "updated": "2025-12-04T16:44:40.266658+00:00", "vendors": ["jumpcloud", "jumpcloud$PRODUCT$remote_assist", "microsoft", "microsoft$PRODUCT$windows"]}