CVE-2023-3494

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The interface lets the guest copy a string into a buffer resident in the bhyve process' memory. A bug in the state machine implementation can result in a buffer overflowing when copying this string. Malicious, privileged software running in a guest VM can exploit the buffer overflow to achieve code execution on the host in the bhyve userspace process, which typically runs as root, mitigated by the capabilities assigned through the Capsicum sandbox available to the bhyve process."}, {"lang": "es", "value": "El controlador fwctl implementa una m\u00e1quina de estados que se ejecuta cuando un hu\u00e9sped bhyve accede a ciertos puertos de E/S x86. La interfaz permite al hu\u00e9sped copiar una cadena en un b\u00fafer residente en la memoria del proceso bhyve. Un error en la implementaci\u00f3n de la m\u00e1quina de estado puede provocar el desbordamiento del b\u00fafer al copiar esta cadena. El software malicioso y privilegiado que se ejecuta en una m\u00e1quina virtual hu\u00e9sped puede explotar el desbordamiento del b\u00fafer para lograr la ejecuci\u00f3n de c\u00f3digo en el host en el proceso de espacio de usuario bhyve, que normalmente se ejecuta como root, mitigado por las capacidades asignadas a trav\u00e9s de la caja de arena Capsicum disponible para el proceso bhyve."}], "id": "CVE-2023-3494", "lastModified": "2026-06-17T06:14:12.840", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.0, "impactScore": 6.0, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-3494", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2024-10-21T20:16:54.904181Z", "version": "2.0.3"}}]}, "published": "2023-08-01T23:15:31.053", "references": [{"source": "secteam@freebsd.org", "tags": ["Vendor Advisory"], "url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-23:07.bhyve.asc"}, {"source": "secteam@freebsd.org", "url": "https://security.netapp.com/advisory/ntap-20230831-0006/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-23:07.bhyve.asc"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.netapp.com/advisory/ntap-20230831-0006/"}], "sourceIdentifier": "secteam@freebsd.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-120"}], "source": "secteam@freebsd.org", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-120"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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