CVE-2021-27406

An attacker can take leverage on PerFact OpenVPN-Client versions 1.4.1.0 and prior to send the config command from any application running on the local host machine to force the back-end server into initializing a new open-VPN instance with arbitrary open-VPN configuration. This could result in the attacker achieving execution with privileges of a SYSTEM user.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.cisa.gov/uscert/ics/advisories/icsa-21-056-01	Third Party Advisory US Government Resource

Configurations

Configuration 1 (hide)

cpe:2.3:a:perfact:openvpn-client:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2022-10-14 17:15

Updated : 2022-10-18 13:38

NVD link : CVE-2021-27406

Mitre link : CVE-2021-27406

CVE.ORG link : CVE-2021-27406

JSON object : View

Products Affected

perfact

openvpn-client

CWE

CWE-610

Externally Controlled Reference to a Resource in Another Sphere

CWE-15

External Control of System or Configuration Setting

{"id": "CVE-2021-27406", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/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": 2.8}, {"type": "Secondary", "source": "ics-cert@hq.dhs.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/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": 2.8}]}, "published": "2022-10-14T17:15:10.530", "references": [{"url": "https://www.cisa.gov/uscert/ics/advisories/icsa-21-056-01", "tags": ["Third Party Advisory", "US Government Resource"], "source": "ics-cert@hq.dhs.gov"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-610"}]}, {"type": "Secondary", "source": "ics-cert@hq.dhs.gov", "description": [{"lang": "en", "value": "CWE-15"}]}], "descriptions": [{"lang": "en", "value": "An attacker can take leverage on PerFact OpenVPN-Client versions 1.4.1.0 and prior to send the config command from any application running on the local host machine to force the back-end server into initializing a new open-VPN instance with arbitrary open-VPN configuration. This could result in the attacker achieving execution with privileges of a SYSTEM user."}, {"lang": "es", "value": "Un atacante puede aprovechar PerFact OpenVPN-Client versiones 1.4.1.0 y anteriores, para enviar el comando config desde cualquier aplicaci\u00f3n que sea ejecutada en el equipo anfitri\u00f3n local para forzar al servidor back-end a inicializar una nueva instancia de Open-VPN con una configuraci\u00f3n arbitraria de Open-VPN. Esto podr\u00eda resultar en que el atacante logre una ejecuci\u00f3n con privilegios de un usuario SYSTEM"}], "lastModified": "2022-10-18T13:38:40.527", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:perfact:openvpn-client:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E4F40462-0D14-4ED0-94C2-B4C23A0A2913", "versionEndIncluding": "1.4.1.0"}], "operator": "OR"}]}], "sourceIdentifier": "ics-cert@hq.dhs.gov"}