CVE-2021-33541

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To restore the network connectivity the device needs to be restarted. The automation task is not affected."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-770", "description": "CWE-770 Allocation of Resources Without Limits or Throttling", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2021-06-25T18:26:05.000Z", "orgId": "270ccfa6-a436-4e77-922e-914ec3a9685c", "shortName": "CERTVDE"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://cert.vde.com/en-us/advisories/vde-2021-019"}], "solutions": [{"lang": "en", "value": "Temporary Fix / Mitigation\n\nPhoenix Contact recommends operating network-capable devices in closed networks or protected with a suitable firewall. For detailed information on our recommendations for measures to protect network-capable devices, please refer to the Phoenix Contact application note:\nMeasures to protect network-capable devices with Ethernet connection (https://dam-mdc.phoenixcontact.com/asset/156443151564/0a870ae433c19148b80bd760f3a1c1f2/107913_en_03.pdf)"}], "source": {"advisory": "VDE-2021-019", "defect": ["VDE-2021-019"], "discovery": "EXTERNAL"}, "title": "Phoenix Contact: ILC1x Industrial controllers affected by Denial-of-Service vulnerability", "x_generator": {"engine": "Vulnogram 0.0.9"}, "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "info@cert.vde.com", "DATE_PUBLIC": "2021-06-23T10:00:00.000Z", "ID": "CVE-2021-33541", "STATE": "PUBLIC", "TITLE": "Phoenix Contact: ILC1x Industrial controllers affected by Denial-of-Service vulnerability"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "ILC1x", "version": {"version_data": [{"version_affected": "=", "version_name": "ILC1x0", "version_value": "all variants"}, {"version_affected": "=", "version_name": "ILC1x1", "version_value": "all variants"}]}}]}, "vendor_name": "Phoenix Contact"}]}}, "credit": [{"lang": "eng", "value": "This vulnerability was discovered by the Industrial Control Security Laboratory of Qi An Xin Technology Group Inc. from China and reported to CERT@VDE. PHOENIX CONTACT thanks CERT@VDE for the coordination and support with this publication."}], "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "Phoenix Contact Classic Line Controllers ILC1x0 and ILC1x1 in all versions/variants are affected by a Denial-of-Service vulnerability. The communication protocols and device access do not feature authentication measures. Remote attackers can use specially crafted IP packets to cause a denial of service on the PLC's network communication module. A successful attack stops all network communication. To restore the network connectivity the device needs to be restarted. 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For detailed information on our recommendations for measures to protect network-capable devices, please refer to the Phoenix Contact application note:\nMeasures to protect network-capable devices with Ethernet connection (https://dam-mdc.phoenixcontact.com/asset/156443151564/0a870ae433c19148b80bd760f3a1c1f2/107913_en_03.pdf)"}], "source": {"advisory": "VDE-2021-019", "defect": ["VDE-2021-019"], "discovery": "EXTERNAL"}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T23:50:42.996Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://cert.vde.com/en-us/advisories/vde-2021-019"}]}]}, "cveMetadata": {"assignerOrgId": "270ccfa6-a436-4e77-922e-914ec3a9685c", "assignerShortName": "CERTVDE", "cveId": "CVE-2021-33541", "datePublished": "2021-06-25T18:26:05.564Z", "dateReserved": "2021-05-24T00:00:00.000Z", "dateUpdated": "2024-09-16T23:21:50.885Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"product": "ILC1x", "vendor": "Phoenix Contact", "versions": [{"status": "affected", "version": "ILC1x0 all variants"}, {"status": "affected", "version": "ILC1x1 all variants"}]}], "source": "info@cert.vde.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:phoenixcontact:ilc1x0_firmware:*:*:*:*:*:*:*:*", "matchCriteriaId": "5AC07A81-D5D6-449C-93F8-93D6E87487DD", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:phoenixcontact:ilc1x0:-:*:*:*:*:*:*:*", "matchCriteriaId": "AE45F6AF-7286-48F7-B4BE-AFC948884C7C", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:phoenixcontact:ilc1x1_firmware:*:*:*:*:*:*:*:*", "matchCriteriaId": "8E168AB1-1B81-4990-95E4-56C36275609B", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:phoenixcontact:ilc1x1:-:*:*:*:*:*:*:*", "matchCriteriaId": "9E318A8B-D1D1-4DD5-AF71-DCBFEFCF2C5E", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Phoenix Contact Classic Line Controllers ILC1x0 and ILC1x1 in all versions/variants are affected by a Denial-of-Service vulnerability. The communication protocols and device access do not feature authentication measures. Remote attackers can use specially crafted IP packets to cause a denial of service on the PLC's network communication module. A successful attack stops all network communication. To restore the network connectivity the device needs to be restarted. The automation task is not affected."}, {"lang": "es", "value": "Phoenix Contact Classic Line Controllers ILC1x0 e ILC1x1 en todas sus versiones/variantes est\u00e1n afectados por una vulnerabilidad de denegaci\u00f3n de servicio. Los protocolos de comunicaci\u00f3n y el acceso al dispositivo no cuentan con medidas de autenticaci\u00f3n. Unos atacantes remotos pueden usar paquetes IP especialmente dise\u00f1ados para causar una denegaci\u00f3n de servicio en el m\u00f3dulo de comunicaci\u00f3n de red del PLC. Un ataque con \u00e9xito detiene toda la comunicaci\u00f3n de red. Para restablecer la conectividad de la red es necesario reiniciar el dispositivo. La tarea de automatizaci\u00f3n no est\u00e1 afectada"}], "id": "CVE-2021-33541", "lastModified": "2026-06-17T03:54:45.350", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 7.8, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 6.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "info@cert.vde.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-06-25T19:15:09.757", "references": [{"source": "info@cert.vde.com", "tags": ["Third Party Advisory"], "url": "https://cert.vde.com/en-us/advisories/vde-2021-019"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://cert.vde.com/en-us/advisories/vde-2021-019"}], "sourceIdentifier": "info@cert.vde.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-770"}], "source": "info@cert.vde.com", "type": "Secondary"}]}

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