{"id":"CVE-2021-33541","state":"PUBLISHED","title":"Phoenix Contact: ILC1x Industrial controllers affected by Denial-of-Service vulnerability","description":"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.","publishedAt":"2021-06-25T18:26:05.564Z","updatedAt":"2024-09-16T23:21:50.885Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"CERTVDE"},"assigner":"CERTVDE","products":["Phoenix Contact ILC1x"],"affected":[{"vendor":"Phoenix Contact","product":"ILC1x","versions":[{"version":"ILC1x0 all variants","status":"affected"},{"version":"ILC1x1 all variants","status":"affected"}]}],"references":["https://cert.vde.com/en-us/advisories/vde-2021-019"],"weaknesses":["CWE-770"],"ingestedAt":"2026-10-29T19:48:36.050Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2021/33xxx/CVE-2021-33541.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2021-33541","state":"PUBLISHED","datePublished":"2021-06-25T18:26:05.564Z","dateUpdated":"2024-09-16T23:21:50.885Z","assignerShortName":"CERTVDE","assignerOrgId":"270ccfa6-a436-4e77-922e-914ec3a9685c","dateReserved":"2021-05-24T00:00:00.000Z"},"containers":{"cna":{"title":"Phoenix Contact: ILC1x Industrial controllers affected by Denial-of-Service vulnerability","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."}],"affected":[{"vendor":"Phoenix Contact","product":"ILC1x","versions":[{"version":"ILC1x0 all variants","status":"affected"},{"version":"ILC1x1 all variants","status":"affected"}]}],"references":[{"url":"https://cert.vde.com/en-us/advisories/vde-2021-019","tags":["x_refsource_CONFIRM"]}],"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":{"shortName":"CERTVDE","dateUpdated":"2021-06-25T18:26:05.000Z","orgId":"270ccfa6-a436-4e77-922e-914ec3a9685c"},"credits":[{"lang":"en","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."}],"datePublic":"2021-06-23T00:00:00.000Z","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"},"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. The automation task is not affected."}]},"generator":{"engine":"Vulnogram 0.0.9"},"impact":{"cvss":{"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"}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-770 Allocation of Resources Without Limits or Throttling"}]}]},"references":{"reference_data":[{"name":"https://cert.vde.com/en-us/advisories/vde-2021-019","refsource":"CONFIRM","url":"https://cert.vde.com/en-us/advisories/vde-2021-019"}]},"solution":[{"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"}}},"adp":[{"title":"CVE Program Container","references":[{"url":"https://cert.vde.com/en-us/advisories/vde-2021-019","tags":["x_refsource_CONFIRM","x_transferred"]}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2024-08-03T23:50:42.996Z"}}]}}}